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.
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.
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.
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
Description : An egg sinks in soft water but floats in a concentrated solution of salt because – (1) Egg absorbs salt from the solution and expands (2) Albumin dissolves in salt solution and egg becomes lighter (3) The density of salt solution exceeds the density of eggs (4) Water has high surface tension
Last Answer : (3) The density of salt solution exceeds the density of eggs Explanation: Following the density principle, the density of the egg compared to the density of the tap water is lesser (the density principle ... and that is why an egg sinks in soft water but floats in a concentrated solution of salt.
Description : An egg sinks in soft water but floats in a concentrated solution of salt because (1) egg absorbs salt from the solution and expands (2) albumin dissolves in salt solution and egg becomes lighter (3) the density of salt solution exceeds the density of eggs (4) water has high surface tension
Last Answer : the density of salt solution exceeds the density of eggs
Description : Why is the gas thermometers is more sensitive than the liquid thermometer? -Do You Know?
Last Answer : answer:
Description : Why is the gas thermometers is more sensitive than the liquid thermometer?
Last Answer : Expand more than liquids
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.
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
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
Description : Which of the following in the correct device that converts thermal energy into electrical energy? (1) constant volume gas thermometer (2) liquid-in-glass thermometer (3) thermopile (4) none of these
Last Answer : (3) thermopile Explanation: A thermopile is an electronic device that converts thermal energy into electrical energy.
Description : In the diving apparatus, helium is used along with oxygen, because it is (A) Easily available (B) Not soluble in blood at high pressure (C) Lighter than nitrogen (D) Completely miscible with oxygen
Last Answer : (B) Not soluble in blood at high pressure
Description : (1) aluminium powder and ammonium nitrate Explanation: Ammonal is an explosive made up of ammonium nitrate and aluminium powder. The ammonium nitrate functions as an oxidizer and the aluminium ... a fairly substantial shock, though it is still more sensitive than trinitrotoluene and composition C4.
Last Answer : Gelatin is mostly used in making icecreams in order to - (1) prevent making a colloid (2) stabilise the colloid and prevent crystallisation (3) stabilise mixture (4) enrich the aroma
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 : (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 ... than any other common substance. As a result, water plays a very important role in temperature regulation
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
Description : Pipelines in cold countries often burst in winter, because – (1) Water freezes and expands in its volume (2) Temperature of ice is less than that of water (3) Pipelines contract in their volume (4) Pipelines expand due to freezing
Last Answer : (1) Water freezes and expands in its volume Explanation: Water expands on freezing. When liquid water is cooled, it contracts like one would expect until a temperature of approximately 4 degrees ... it expands by approximately 9%. The fact that water expands upon freezing causes icebergs to float.
Description : Pipelines in cold countries often burst in winter, because (1) water freezes and expands in its volume (2) temperature of ice is less than that of water (3) pipelines contract in their volume (4) pipelines expand due to freezing
Last Answer : water freezes and expands in its volume
Description : The length of a liquid stream while flowing over a weir __________ at the ends of the sill. (A) Expands (B) Does not change (C) Contracts (D) None of these
Last Answer : Answer: Option C
Description : State two advantages and two drawbacks of liquid filled and gas filled thermometer.
Last Answer : Liquid filled thermometer Advantages: 1) They are comparatively cheaper than other temperature measurement devices. 2) They are handy and convenient to use. 3) Unlike electrical thermometers, they do ... : 1) Larger bulb size. 2) Generates less deflection force for controlling device.
Description : Photographic plates are covered with black paper because (a) the cellulose acetate of the paper must remain fresh (b) sunlight is easily absorbed by black paper and it helps develop the film ... paper prevents contact with light (d) the conversion of silver bromide to metallic silver is essential
Last Answer : Ans:(c)
Description : Water pipes in hilly areas often burst on a cold frosty night, because – (1) The material of which pipes are made contracts due to cold and so breaks (2) Water in the pipes freezes and on freezing water expands, so pipes break (3) Frost makes the pipes rusty, so they break (4) None of these
Last Answer : (2) Water in the pipes freezes and on freezing water expands, so pipes break Explanation: The temperature may fall below 0° C during cold frosty nights which converts the water inside the pipes into ice, ... in an increase in volume. This exerts great force on the pipes and as a result, they burst.
Description : In severe winter, in cold countries water pipes burst because – (1) Water expands on freezing (2) Contraction of water pipes (3) High atmospheric pressure (4) Combined effect of all the above three
Last Answer : (1) Water expands on freezing Explanation: Most liquids have a quite simple behavior when they are cooled (at a fixed pressure): they shrink. The liquid contract as it is cooled; ... substance solidifies, which causes it to contract some more because crystalline solids are usually tightly packed.
Description : When hot-water is sprinkled on a hotter glass tumbler, it breaks because – (1) glass suddenly expands (2) glass suddenly contracts (3) water evaporates (4) glass reacts chemically with water
Last Answer : (2) glass suddenly contracts Explanation: If the poured liquid is relatively hotter or colder in comparison to the tumbler, it will break. When hot water is poured into a tumbler there is an uneven increase in the thermal expansion of the walls of the vessel.
Description : When hot-water is sprinkled on a hotter glass tumbler, it breaks because (1) glass suddenly expands (2) glass suddenly contracts (3) water evaporates (4) glass reacts chemically with water
Last Answer : glass suddenly contracts
Description : In severe winter, in cold countries water pipes burst because (1) water expands on freezing (2) contraction of water pipes (3) high atmospheric pressure (4) combined effect of all the above three
Last Answer : water expands on freezing
Description : Water pipes in hilly areas often burst on a cold frosty night, because (1) the material of which pipes are made contracts due to cold and so breaks (2) water in the pipes freezes and on freezing water expands, so pipes break (3) frost makes the pipes rusty, so they break (4) None of these
Last Answer : water in the pipes freezes and on freezing water expands, so pipes break
Description : Which of the following devices can be used to detect radiant heat? (1) Liquid thermometer (2) Six's maximum and minimum thermometer (3) Constant volume air thermometer (4) Thermopile
Last Answer : (4) Thermopile Explanation: Based on the thermoelectric effect, the thermopile can be used as a heat sensor to measure thermal radiation. A thermopile is made of thermocouple junction pairs connected electrically in series. Thermocouples near the ground measures radiant energy.
Description : Which of the following devices can be used to detect radiant heat ? (1) Liquid thermometer (2) Six’s maximum and minimum thermometer (3) Constant volume air thermometer (4) Thermopile
Last Answer : Thermopile
Description : LPG when brought to atmospheric pressure & temperature will be a (A) Liquid lighter than water (B) Liquid heavier than water (C) Gas lighter than air (D) Gas heavier than air
Last Answer : (D) Gas heavier than air
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.
Description : Ail oil drop spreads over water because (1) oil is lighter than water (2) oil is more viscous (3) oil does not mix with water (4) surface tension of oil is much smaller than that of water
Last Answer : (4) surface tension of oil is much smaller than that of water Explanation: Surface tension is a contractive tendency of the surface of a liquid that allows it to resist an external force. It is ... is caused by cohesion of similar molecules, and is responsible for many of the behaviors of liquids.
Description : Enrichment of uranium by gaseous diffusion relies on the fact that uranium-235 diffuses through holes in the barriers more readily than uranium-238 does because uranium-235 is: w) a different chemical ... x) a different wavelength. y) resistant to magnetism. z) slightly lighter than uranium-238.
Last Answer : ANSWER: Z -- SLIGHTLY LIGHTER THAN URANIUM-238.
Description : An oil drop spreads over water because (1) oil is lighter than water (2) oil is more viscous (3) oil does not mix with water (4) surface tension of oil is much smaller than that of water
Last Answer : surface tension of oil is much smaller than that of water
Description : Is it true if you let air out of a bicycle tire the valve becomes cold. This is because when a gas under pressure expands it releases energy to the environment?
Last Answer : Feel Free to Answer
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.
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
Description : When a person who has been taking opioids becomes less sensitive to their analgesic properties, that person is said to have developed a (an) a) tolerance. Tolerance is characterized by the need ... using more than one form of analgesia concurrently to obtain more pain relief with fewer side effects.
Last Answer : a) tolerance. Tolerance is characterized by the need for increasing dose requirements to maintain the same level of pain relief.
Description : If a gas absorbs `200J` of heat and expands by `500 cm^(3)` against a constant pressure of `2 xx 10^(5) N m^(-2)`, then the change in internal energy
Last Answer : If a gas absorbs `200J` of heat and expands by `500 cm^(3)` against a constant pressure of `2 xx 10^(5) N ... . `-100 J` C. `+100 J` D. None of these
Description : . The entropy change in a reversible isothermal process, when an ideal gas expands to four times its initial volume is (A) R loge 4 (B) R log10 4 (C) Cv log10 4 (D) Cv loge 4
Last Answer : (A) R loge 4
Description : Which of the following events is heat exchange involved? a. when there is a phase change b. when there is a chemical reaction c. when the gas expands adiabatically d. when there is difference in temperature
Last Answer : when the gas expands adiabatically
Description : Helium gas is used in gas balloons instead of hydrogen gas because it is (1) lighter than hydrogen (2) more abundant than hydrogen (3) non-combustible (4) more stable
Last Answer : non-combustible
Description : Helium gas is filled in ballons because (1) its atomic number is 2 (2) it is lighter than air (3) it is one of the constitutents of water (4) it is a noble gas
Last Answer : it is lighter than air
Description : A pre-stressed concrete pile is (A) Easy to handle (B) Lighter in weight (C) Extremely durable (D) All the above
Last Answer : Answer: Option D
Description : ___ is a milk process that makes milk more easily digested by those with a sensitive digestive system. a) Ionization b) Evaporation c) Pasteurization d) Homogenization
Last Answer : d) Homogenization
Description : What advantage is there for an enterprise to adopt a virtual private cloud model? A. Reduce costs by adopting a flexible pricing model for the entire operation. B. Reduce infrastructure ... such as security and performance since the entire infrastructure will be managed within the IT department.
Last Answer : Manage sensitive data in a compliant and secure manner and benefit from flexible pricing models for select services or infrastructure.
Description : It is easy to burst a gas-filled balloon with a needle than with a nail. It is because – (1) nail is more longer than needle. (2) nail exerts more pressure than needle on the balloon. (3) needle exerts more pressure than nail on the balloon. (4) gas is reactive with the needle.
Last Answer : (3) needle exerts more pressure than nail on the balloon. Explanation: It is easy to burst a gas-filled balloon with a needle than with a nail because the needle applies more pressure than nail. Besides, ... tip of the needle, so only a little force gives a lot of pressure (pressure = force/area).
Description : It is easy to burst a gas-filled balloon with a neelde than with a nail. It is because (1) nail is more longer than needle. (2) nail exerts more pressure than needle on the balloon. (3) needle exerts more pressure than nail on the balloon. (4) gas is reactive with the needle.
Last Answer : needle exerts more pressure than nail on the balloon.
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