Water is used in hot water bags because (1) It is easily obtained (2) It is cheaper and is not harmful (3) It has high specific heat (4) It Is easy to heat water

Water is used in hot water bags because (1) It is easily obtained (2) It is cheaper and is not harmful (3) It has high specific heat (4) It Is easy to heat water
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(3) It has high specific heat Explanation: The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius: The specific heat of water is 1 calorie/gram °C = 4. 186 joule/gram °C which is higher than any other common substance. As a result, water plays a very important role in temperature regulation
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Water is used in hot water bags because (1) It is easily obtained (2) It is cheaper and is not harmful (3) It has high specific heat (4) It is easy to heat water

Description : Water is used in hot water bags because (1) It is easily obtained (2) It is cheaper and is not harmful (3) It has high specific heat (4) It is easy to heat water

Last Answer : It has high specific heat

Water is used in a hot water bag because – (1) It is easily available (2) It has high specific gravity (3) It has high specific heat (4) It is a liquid substance

Description : Water is used in a hot water bag because – (1) It is easily available (2) It has high specific gravity (3) It has high specific heat (4) It is a liquid substance

Last Answer : (3) It has high specific heat Explanation: Water has the highest specific heat of any known substance except hydrogen; that is, it requires more heat to raise the temperature of water a definite ... to raise the temperature of an equal amount of any other substance the same number of degrees.

In cold countries alcohol is preferred to mercury as a thermometric liquid because (a) alcohol is a better conductor of heat (b) alcohol can be coloured and its level seen easily (c) alcohol has a lower freezing point than mercury (d) alcohol is cheaper than mercury

Description : In cold countries alcohol is preferred to mercury as a thermometric liquid because (a) alcohol is a better conductor of heat (b) alcohol can be coloured and its level seen easily (c) alcohol has a lower freezing point than mercury (d) alcohol is cheaper than mercury

Last Answer : Ans:(c)

Water is used in car radiator because of its – (1) low density (2) easy availability (3) high specific heat capacity (4) low boiling point

Description : Water is used in car radiator because of its – (1) low density (2) easy availability (3) high specific heat capacity (4) low boiling point

Last Answer : (3) high specific heat capacity Explanation: Water is used in car radiators because the Specific heat capacity of water is high as a result of which it takes away the heat from engine better compared to ... coolant used in the radiator. If the radiator was to overheat the car would come to a stop.

Water is used in car radiator because of its (1) low density (2) easy availability (3) high specific heat capacity (4) low boiling point

Description : Water is used in car radiator because of its (1) low density (2) easy availability (3) high specific heat capacity (4) low boiling point

Last Answer : high specific heat capacity

When hot liquid is poured into a thick glass tumbler, it cracks because glass – (1) is a bad conductor of heat so only inner surface expands (2) has high temperature coefficient of expansion (3) has a very low specific heat (4) has low temperature coefficient of expansion

Description : When hot liquid is poured into a thick glass tumbler, it cracks because glass – (1) is a bad conductor of heat so only inner surface expands (2) has high temperature coefficient of expansion (3) has a very low specific heat (4) has low temperature coefficient of expansion

Last Answer : (1) is a bad conductor of heat so only inner surface expands Explanation: When hot liquid is poured into a thick glass tumbler, it cracks because glass is a bad conductor of heat so only inner surface expands.

When hot liquid is poured into a thick glass tumbler, it cracks because glass : (1) is a bad conductor of heat so only inner surface expands (2) has high temperature coefficient of expansion (3) has a very low specific heat (4) has low temperature coefficient of expansion

Description : When hot liquid is poured into a thick glass tumbler, it cracks because glass : (1) is a bad conductor of heat so only inner surface expands (2) has high temperature coefficient of expansion (3) has a very low specific heat (4) has low temperature coefficient of expansion

Last Answer :  is a bad conductor of heat so only inner surface expands 

Animal protein is called first class protein because it is - (1) easily digestible (2) delicious in taste (3) cheaper in the market (4) rich in essential amino acids

Description : Animal protein is called first class protein because it is - (1) easily digestible (2) delicious in taste (3) cheaper in the market (4) rich in essential amino acids

Last Answer : (4) rich in essential amino acids Explanation: Proteins from animals are called 'first class' proteins - they provide all the essential amino acids, including those that the body can't make. Proteins from plants are 'second class' proteins.

Animal protein is called first class protein because it is (1) easily digestible (2) delicious in taste (3) cheaper in the market (4) rich in essential amino acids

Description : Animal protein is called first class protein because it is (1) easily digestible (2) delicious in taste (3) cheaper in the market (4) rich in essential amino acids

Last Answer :  rich in essential amino acids

A gas thermometer is more sensitive than a liquid thermometer because a gas: (1) is lighter than liquid (2) expands more than a liquid (3) is easy to obtain (4) does not change state easily

Description : A gas thermometer is more sensitive than a liquid thermometer because a gas: (1) is lighter than liquid (2) expands more than a liquid (3) is easy to obtain (4) does not change state easily

Last Answer : (4) does not change state easily Explanation: Gas is easily compressed so it would have a more versatile range of measurement at least in our atmospheric conditions. Liquid is not so ... apparatus is a constant volume thermometer. Gas thermometers are often used to calibrate other thermometers.

A gas thermometer is more sensitive than a liquid thermometer because a gas : (1) is lighter than liquid (2) expands more than a liquid (3) is easy to obtain (4) does not change state easily

Description : A gas thermometer is more sensitive than a liquid thermometer because a gas : (1) is lighter than liquid (2) expands more than a liquid (3) is easy to obtain (4) does not change state easily

Last Answer : does not change state easily

. Urea is a better fertilizer than ammonium sulphate, because (A) It is cheaper (B) Nitrogen content is higher (C) It is not poisonous (D) It is easy to manufacture

Description : . Urea is a better fertilizer than ammonium sulphate, because (A) It is cheaper (B) Nitrogen content is higher (C) It is not poisonous (D) It is easy to manufacture

Last Answer : (B) Nitrogen content is higher

Why are recycled plastic bags considered harmful for the environment? -SST 10th

Description : Why are recycled plastic bags considered harmful for the environment? -SST 10th

Last Answer : Plastics are recycled by plastic manufacturers. Plastic is non-biodegradable. The bonds of carbon in plastic are impossible to break down through a physical or chemical process. They have to ... melting of plastic and plastic products breaks some polymer chains into smaller units which are harmful.

Ice is packed in saw dust because – (1) saw dust will not get melted easily. (2) saw dust is poor conductor of heat. (3) saw dust is a good conductor of heat. (4) saw dust does not stick to the ice.

Description : Ice is packed in saw dust because – (1) saw dust will not get melted easily. (2) saw dust is poor conductor of heat. (3) saw dust is a good conductor of heat. (4) saw dust does not stick to the ice.

Last Answer : (2) saw dust is poor conductor of heat. Explanation: ice needs to absorb heat energy to melt and become water (called latent heat of fusion). Since saw-dust is a poor conductor of heat, it takes ... required heat energy. This allows ice to remain in solid state for more time when packed in saw dust.

Ice is packed in saw dust because (1) saw dust will not get melted easily. (2) saw dust is poor conductor of heat. (3) saw dust is a good conductor of heat. (4) saw dust does not stick to the ice.

Description : Ice is packed in saw dust because (1) saw dust will not get melted easily. (2) saw dust is poor conductor of heat. (3) saw dust is a good conductor of heat. (4) saw dust does not stick to the ice.

Last Answer : saw dust is poor conductor of heat.

Nichrome wire is used as a heating element I many appliances because (a) it can be drawn out into wires easily (b) it has high resistivity (c) it resists oxidation in air when red hot (d) both (b) and (c) are correct

Description : Nichrome wire is used as a heating element I many appliances because (a) it can be drawn out into wires easily (b) it has high resistivity (c) it resists oxidation in air when red hot (d) both (b) and (c) are correct

Last Answer : Ans:(d)

Water is a good solvent of ionic salts because - (1) It has no colour (2) It has a boiling point (3) It has a high dipole moment (4) It has a high specific heat

Description : Water is a good solvent of ionic salts because - (1) It has no colour (2) It has a boiling point (3) It has a high dipole moment (4) It has a high specific heat

Last Answer : (3) It has a high dipole moment

Water is not suitable as a calorimetric substance because it – (1) has high specific heat (2) is a good conductor (3) has high boiling point (4) low latent heat of vaporization

Description : Water is not suitable as a calorimetric substance because it – (1) has high specific heat (2) is a good conductor (3) has high boiling point (4) low latent heat of vaporization

Last Answer : (1) has high specific heat Explanation: The specific heat of water is higher than all other common substances. Hence, water is used for heating purposes (as in hot water bottles) and for cooling ... the liquids, mercury has the lowest specific heat due to which it is used as a thermometric liquid.

Water is not suitable as a calorimetric substance because it : (1) has high specific heat (2) is a good conductor (3) has high boiling point (4) low latent heat of vapourization

Description : Water is not suitable as a calorimetric substance because it : (1) has high specific heat (2) is a good conductor (3) has high boiling point (4) low latent heat of vapourization

Last Answer : has high specific heat

The snow on the mountains does NOT melt all at once when it is heated by the sum because: (1) It becomes very hard (2) It reflects most of the heat from the sum (3) it has a low specific heat capacity (4) it has a high latent heat of fusion

Description : The snow on the mountains does NOT melt all at once when it is heated by the sum because: (1) It becomes very hard (2) It reflects most of the heat from the sum (3) it has a low specific heat capacity (4) it has a high latent heat of fusion

Last Answer : (2) It reflects most of the heat from the sum Explanation: Newly formed snow reflects about 90 per cent of the sunlight that falls upon it. This means that the sun is powerless to melt clean snow. And when ... on a spring day because of the sun's heat. It melts because of the warm air from the sea.

Gas thermometers are more sensitive than the liquid thermometers because the gases – (1) have large coefficient of expansion (2) are lighter (3) have low specific heat (4) have high specific heat

Description : Gas thermometers are more sensitive than the liquid thermometers because the gases – (1) have large coefficient of expansion (2) are lighter (3) have low specific heat (4) have high specific heat

Last Answer : (1) have large coefficient of expansion Explanation: Gases are more sensitive to the temperature than liquids (such as mercury). That means gas expands more than the mercury for the same increase of temperature. Hence the has thermometer is more sensitive than liquid (mercury) thereto-meter.

Gas thermometers are more sensitive than the liquid thermometers because of the gases - (1) have low specific heat (2) have high specific heat (3) have large coefficient of expansion (4) are lighter

Description : Gas thermometers are more sensitive than the liquid thermometers because of the gases - (1) have low specific heat (2) have high specific heat (3) have large coefficient of expansion (4) are lighter

Last Answer : (1) have low specific heat Explanation: Gas thermometers are more sensitive because gas has low specific heat than liquids.

Gas thermometers are more sensitive than the liquid thermometers because the gases (1) have large coefficient of expansion (2) are lighter (3) have low specific heat (4) have high,specific heat

Description : Gas thermometers are more sensitive than the liquid thermometers because the gases (1) have large coefficient of expansion (2) are lighter (3) have low specific heat (4) have high,specific heat

Last Answer : have large coefficient of expansion

The snow on the mountains does NOT melt all at once when it is heated by the sun because: (1) it becomes very hard (2) it reflects most of the heat from the sun (3) it has a low specific heat capacity (4) it has a high latent heat of fusion

Description : The snow on the mountains does NOT melt all at once when it is heated by the sun because: (1) it becomes very hard (2) it reflects most of the heat from the sun (3) it has a low specific heat capacity (4) it has a high latent heat of fusion

Last Answer : it reflects most of the heat from the sun

Magnetising steel is normals difficult because (a) it corrodes easily (6) it has high permeability (c) it has high specific gravity (d) it has low permeability

Description : Magnetising steel is normals difficult because (a) it corrodes easily (6) it has high permeability (c) it has high specific gravity (d) it has low permeability

Last Answer : (d) it has low permeability

Copper wires are generally used for electrical power transmission instead of iron wire because (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron

Description : Copper wires are generally used for electrical power transmission instead of iron wire because (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron

Last Answer : (3) copper is a better conductor of electricity than iron Explanation: Copper is generally preferred for electrical power transmission instead of iron because of its high electrical conductivity and low resistivity.

Copper wires are generally used for electrical power transmission instead of iron wire because : (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron

Description : Copper wires are generally used for electrical power transmission instead of iron wire because : (1) copper is cheaper than iron (2) copper is lighter than iron (3) copper is a better conductor of electricity than iron (4) copper can take higher power than iron 

Last Answer : copper is a better conductor of electricity than iron

The restriction enzymes are used in genetic engineering, because (a) they can cut DNA at specific base sequence (b) they are nucleases that cut DNA at variable sites (c) they can degrade harmful proteins (d) they can join different DNA fragments.

Description : The restriction enzymes are used in genetic engineering, because (a) they can cut DNA at specific base sequence (b) they are nucleases that cut DNA at variable sites (c) they can degrade harmful proteins (d) they can join different DNA fragments.

Last Answer : (a) they can cut DNA at specific base sequence

3. Overhead projector is superior to short circuit TV in a classroom teaching because (a) It is cheap and self devised (6) Pictures in it may be shown in a desired sequence and with a minimum of lost motion (material) (c) Information presented though it is easily retained (d) it is easy to use

Description : 3. Overhead projector is superior to short circuit TV in a classroom teaching because (a) It is cheap and self devised (6) Pictures in it may be shown in a desired sequence and with a minimum of lost motion (material) (c) Information presented though it is easily retained (d) it is easy to use

Last Answer : (c) Information presented though it is easily retained

In a barometer, mercury is preferred over water because (a) mercury is a good conductor of heat (b) mercury is shining and therefore its level can be read easily (c) mercury is available in pure form (d) mercury has high density and low vapour pressure

Description : In a barometer, mercury is preferred over water because (a) mercury is a good conductor of heat (b) mercury is shining and therefore its level can be read easily (c) mercury is available in pure form (d) mercury has high density and low vapour pressure

Last Answer : Ans:(d)

Mercury is commonly used as a thermometric fluid rather than water because (1) specific heat of mercury is less than water (2) specific heat of mercury is more than water (3) mercury has greater visibility than water (4) density of mercury is more than the water

Description : Mercury is commonly used as a thermometric fluid rather than water because (1) specific heat of mercury is less than water (2) specific heat of mercury is more than water (3) mercury has greater visibility than water (4) density of mercury is more than the water

Last Answer : (3) mercury has greater visibility than water Explanation: One special kind of mercury-inglass thermometer, called a maximum thermometer, works by having a constriction in the neck close to the bulb.

Steam at 100°C causes more severe burns than water at 100° C because – (1) steam has no specific heat capacity (2) steam has latent heat of vaporization (3) water has no specific heat capacity (4) water has latent heat of fusion

Description : Steam at 100°C causes more severe burns than water at 100° C because – (1) steam has no specific heat capacity (2) steam has latent heat of vaporization (3) water has no specific heat capacity (4) water has latent heat of fusion

Last Answer : (2) steam has latent heat of vaporization Explanation: It is because steam releases its latent heat as it condenses, which is substantial. The heat of vaporization of steam is over 2000 J per gram. And when it releases that it's then 100 degree water, the same as boiling water.

Steam at 1000C causes more severe burns than water at 100° C because (1) steam has no specific heat capacity (2) steam has latent heat of vaporisation (3) water has no specific heat capacity (4) water has latent heat of fusion

Description : Steam at 1000C causes more severe burns than water at 100° C because (1) steam has no specific heat capacity (2) steam has latent heat of vaporisation (3) water has no specific heat capacity (4) water has latent heat of fusion

Last Answer :  steam has latent heat of vaporisation

Pick up the correct statement from the following: (A) Lime mortar with cement in the ratio of in 10 is cheaper and better for outside plaster (B) For very cold or very hot climate, a compact and closed plan should be provided (C) On the sea coast, an exposed and open house is generally preferred (D) All the above

Description : Pick up the correct statement from the following: (A) Lime mortar with cement in the ratio of in 10 is cheaper and better for outside plaster (B) For very cold or very hot climate, a compact and closed ... (C) On the sea coast, an exposed and open house is generally preferred (D) All the above

Last Answer : Answer: Option D

A cyclic engine exchanges heat with two reservoirs maintained at 100 and 300°C respectively. The maximum work (in J) that can be obtained from 1000 J of heat extracted from the hot reservoir is (A) 349 (B) 651 (C) 667 (D) 1000

Description : A cyclic engine exchanges heat with two reservoirs maintained at 100 and 300°C respectively. The maximum work (in J) that can be obtained from 1000 J of heat extracted from the hot reservoir is (A) 349 (B) 651 (C) 667 (D) 1000

Last Answer : (A) 349

In the pressure cooker, cooking is faster because the increase in vapour pressure - (1) increase the specific heat (2) decreases the specific heat (3) decreases the boiling point (4) increases the boiling point

Description : In the pressure cooker, cooking is faster because the increase in vapour pressure - (1) increase the specific heat (2) decreases the specific heat (3) decreases the boiling point (4) increases the boiling point

Last Answer : (4) increases the boiling point

Crude oil is subjected to vacuum distillation in the last stage, because (A) High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose (B) Lighter/low boiling products are prone to thermal decomposition (C) High purity products can be obtained thereby (D) None of these

Description : Crude oil is subjected to vacuum distillation in the last stage, because (A) High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose (B) Lighter/low ... prone to thermal decomposition (C) High purity products can be obtained thereby (D) None of these

Last Answer : (A) High boiling point products like heavy fuel oil & lubricating oils are heat sensitive and may decompose

Hot water (0.01 m3 /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m3 /min) of density 800 kg/m3 and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately (A) 32 (B) 37 (C) 45 (D) 50

Description : Hot water (0.01 m3 /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m3 /min) of density 800 kg/m3 and specific heat of ... mean temperature difference in °C is approximately (A) 32 (B) 37 (C) 45 (D) 50

Last Answer : (A) 32

Is bathing with hot water harmful for body ?

Description : Is bathing with hot water harmful for body ?

Last Answer : Many people usually take a bath in hot water in winter. However, there is some debate over whether bathing in hot water is harmful. Some people say that even if there is relief for ... water raises body temperature. Which not only creates acidity problems , but also affects mental health. Thanks

Expert power is the power that comes from the amount of knowledge a person has obtained in a specific area. This type ofpower is: 1. Critical to a project manager because the PM has to have as much or more knowledge than any of the team members tomake sure the project is completed successfully 2. Used by the PM to influence upper management and the critical stakeholders 3. Important if the project manager wants to maintain the respect of the project team 4. Used sparingly if at all by the PM because the PM cannot stay current on all areas of expertise and also manage the project

Description : Expert power is the power that comes from the amount of knowledge a person has obtained in  a specific area. This type ofpower is: 1. Critical to a project manager because the PM has to have ... by the PM because the PM cannot stay current on all areas of  expertise and also manage the project

Last Answer : 4. Used sparingly if at all by the PM because the PM cannot stay current on all areas of  expertise and also manage the project

Before X-ray examination (coloured Xray) of the stomach, patients are given suitable salt of barium because. (1) barium is a good absorber of X-rays and helps stomach to appear clearly (2) barium salts are white in colour and this helps stomach to appear clearly (3) barium allows X-rays to pass through the stomach (4) barium salts are easily available

Description : Before X-ray examination (coloured Xray) of the stomach, patients are given suitable salt of barium because. (1) barium is a good absorber of X-rays and helps stomach to appear clearly (2) barium ... clearly (3) barium allows X-rays to pass through the stomach (4) barium salts are easily available

Last Answer : (1) barium is a good absorber of X-rays and helps stomach to appear clearly

Steel is more elastic than rubber because it – (1) requires larger deforming force (2) Is never deformed (3) is deformed very easily (4) is harder than rubber

Description : Steel is more elastic than rubber because it – (1) requires larger deforming force (2) Is never deformed (3) is deformed very easily (4) is harder than rubber

Last Answer : (3) is deformed very easily Explanation: Elasticity is the capability of an object to return to its former shape once a load inducing strain is removed. Young Modulus or elastic modulus [tendency to be ... ., nonpermanently) when a force is applied to it] of steel is more than that of rubber.

Steel is more elastic than rubber because it : (1) requires larger deforming force (2) is never deformed (3) is deformed very easily (4) is harder than rubber

Description : Steel is more elastic than rubber because it : (1) requires larger deforming force (2) is never deformed (3) is deformed very easily (4) is harder than rubber

Last Answer : is deformed very easily

Is it permissible to burn harmful animals in fire ? Our village house is infested with ants during the rainy season. Then they are killed with hot ashes from the stove. Then the broom is given. Is it a sin ?

Description : Is it permissible to burn harmful animals in fire ? Our village house is infested with ants during the rainy season. Then they are killed with hot ashes from the stove. Then the broom is given. Is it a sin ?

Last Answer : It is not permissible to burn any harmful animal in fire. The Prophet (peace and blessings of Allaah be upon him) said : وَإِنَّ النَّارَ لاَ يُعَذِّبُ بِهَا আল্লাহِلَّا اللَّهُ No one has the right to ... be permissible ; Rather it would be a sin. (Almuhitul Burhani 6/94 ; Fatawa Hindi 6/361)

Is it cheaper to use a wood pellet stove to heat my house, or will propane be more affordable?

Description : Is it cheaper to use a wood pellet stove to heat my house, or will propane be more affordable?

Last Answer : A pellet stove is a good room heater but may be much more expensive for overall house heating than a regular furnace.

Electricity is transmitted over long distances – (1) it is fast (2) there is less wastage of energy (3) it is safer (4) it is cheaper

Description : Electricity is transmitted over long distances – (1) it is fast (2) there is less wastage of energy (3) it is safer (4) it is cheaper

Last Answer : (2) there is less wastage of energy Explanation: Long distance means higher wastage of energy. So High volt direct-current (HVDC) technology is used forgreater efficiency in very long distances. ... at high voltages (110 kV or above) to reduce the energy lost in long-distance transmission.

Electricity is transmitted over long distances (1) it is fast (2) there is less wastage of energy (3) it is safer (4) it is cheaper

Description : Electricity is transmitted over long distances (1) it is fast (2) there is less wastage of energy (3) it is safer (4) it is cheaper

Last Answer : there is less wastage of energy

Can a las vegas divorce easily be obtained illegally?

Description : Can a las vegas divorce easily be obtained illegally?

Last Answer : There's no such thing as an illegal divorce. Legal divorce proceedings in Las Vegas are the same as anywhere else in America, and uncontested, can take a 2-3 month period and $350 to finalize.

Blister steel (A) Is obtained by cementation process (B) Is full of fissures and cavities (C) Can be easily welded (D) All the above

Description : Blister steel (A) Is obtained by cementation process (B) Is full of fissures and cavities (C) Can be easily welded (D) All the above

Last Answer : Answer: Option D

Water is a highly effective coolant for a car engine because _____ A. Water is good conductor of heat B. Water has very high specific heat capacity C. Water boils at a comparatively high temperature D. Evaporation of water produces lot of cooling

Description : Water is a highly effective coolant for a car engine because _____ A. Water is good conductor of heat B. Water has very high specific heat capacity C. Water boils at a comparatively high temperature D. Evaporation of water produces lot of cooling

Last Answer : ANSWER: A