Description : Which one of the following has the highest value of specific heat? (1) Glass (2) Copper (3) Lead (4) Water
Last Answer : (4) Water 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 ... in temperature regulation. The specific heat per gram for water is much higher than that for a metal.
Last Answer : Water
Description : What has the highest specific heat lead copper iron or granite?
Last Answer : Definitely Granite because although copper, iron and lead all lack metabolism, causing granite to be the heaviest of the bunch.
Description : Which of the following has the highest specific heat? a) lead b) mercury c) water d) alcohol
Last Answer : c) water
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 : Pick out the wrong statement. (A) Copper is the metal having the highest electronic conductivity (B) Hardenability & Weldability of metals are inversely related (C) Covalent bonding formed by ... all semiconductor materials (D) Glass transition temperature applies to 'polymers' but not to 'glasses'
Last Answer : Option A
Description : Out of the following, maximum temperature drop for a given heat flow & for the same thickness will be in the case of (A) Steel (B) Glass wood (C) Copper (D) Fireclay bricks
Last Answer : B) Glass wood
Description : The biggest point sources of waste heat originate from ....... production. a) Steel or Brass b) Copper or Glass c) Steel or Glass d) Steel or Copper
Last Answer : Steel or Glass
Description : Heat exchanger tubes are never made of (A) Plain carbon steel (B) Stainless steel (C) Lead (D) Copper
Last Answer : (C) Lead
Description : The best conductors of heat are A) Silver and Copper B) Lead and Mercury C) Iron and Tin D) Gold and Platinum
Last Answer : A) Silver and Copper
Description : Fuse wire is made of an alloy of – (1) Tin and Lead (2) Tin and Copper (3) Lead and Copper (4) Copper and Silver
Last Answer : (1) Tin and Lead Explanation: The common material used as fuse wire is an alloy of tin and lead (63% tin and 37% lead). Fuse wires provide over current protection of an electrical circuit ... wire or strip that melts when too much current flows through it, thereby interrupting the flow of current.
Description : A fuse wire is made of: (1) an alloy of tin and copper (2) an alloy of tin and lead (3) an alloy of tin and aluminium (4) an alloy of nickel and chromium
Last Answer : (2) an alloy of tin and lead Explanation: Electric fuse wire is an alloy made of tin (63 % lead 37 %. The cross sectional area determines the melting point at a certain current. Alloys (e.g. ... resulting combination of good conductivity (due to the tin) with a low melting point due to the lead).
Description : The metal whose electrical conductivity is more, is – (1) copper (2) aluminium (3) silver (4) lead
Last Answer : (3) silver Explanation: Copper ; 9% less conductive than silver: aluminium is 1 0% less conductive than copper; while steel is the least conductive among the given options. The most electrically conductive metal is silver.
Description : The filament of electric bulb is made up of : (1) Copper (2) Nichrome (3) Lead (4) Tungsten
Last Answer : (4) Tungsten Explanation: An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light which produces light with a filament wire heated to a high temperature by an electric ... through it, until it glows. Tungsten, also known as wolfram, is a chemical element.
Description : Fuse wire is made of an alloy of (1) Tin and Lead (2) Tin and Copper (3) Lead and Copper (4) Copper and Silver
Last Answer : Tin and Lead
Last Answer : an alloy of tin and lead
Description : The metal whose electrical conductivity is more, is (1) copper (2) aluminium (3) silver (4) lead
Last Answer : silver
Last Answer : Tungsten
Description : __________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant. (A) Pyrex (B) Soda lime (C) Lead (D) High silica
Last Answer : (A) Pyrex
Description : Which of the following has the highest value of refractive index? (A) Brine (sea water) (B) Diamond (C) Distilled water (D) Glass
Last Answer : (B) Diamond
Description : The matter having highest specific heat . capacity?
Description : Which of the following alkali metals has highest specific heat? (1) Caesium (2) Rubidium (3) Potassium (4) Lithium
Last Answer : Lithium
Description : After long periods of use, a grey spot develops on the inside of a bulb. This is because – (1) the tungsten filament evaporates and collects there (2) the heat of the bulb scorches the glass at the top (3) dust inside the bulb condenses on the top (4) glass undergoes a change due to the heat
Last Answer : (3) dust inside the bulb condenses on the top Explanation: At high operating temperatures, tungsten evaporates from the filament and gradually forms a gray film on the inside of the bulb. The inert ... spot develops in the filament. When this happens, the filament will break and the bulb fails.
Description : Which variety of glass is heat resistant? (1) Hard glass (2) Flint glass (3) Pyrex glass (4) Bottle glas
Last Answer : (3) Pyrex glass Explanation: Older clear-glass Pyrex manufactured by Corning, Arc International's Pyrex products, and Pyrex laboratory glassware are made of borosilicate glass.
Description : After long periods of use, a grey spot develops on the inside of a bulb. This is because (1) the tungsten filament evaporates and collects there (2) the heat of the bulb scorches the glass at the top (3) dust inside the bulb condenses on the top (4) glass undergoes a change due to the heat
Last Answer : dust inside the bulb condenses on the top
Description : The coefficient of static friction will have the highest value in case of a.Mild steel and mild steel b.Mild steel and copper c.Cast iron and steel d.Rope and wood e.Any of the above loctions
Last Answer : d. Rope and wood
Description : A lead-acid battery is considered fully charged when the ______________. A. electrolyte gasses freely B. battery charger ammeter indicates a positive reading C. terminal voltage reaches a constant value at a ... cells reaches the correct value and no longer increases over a period of 1 to 4 hours
Last Answer : Answer: D
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.
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.
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 : 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 : Heat given to a body which raises its temperature by 1°C is known as - (1) water equivalent (2) thermal capacity (3) specific heat (4) temperature gradient
Last Answer : (2) thermal capacity Explanation: Heat capacity or thermal capacity is a measurable physical quantity equal to the ratio of the heat added to (or removed from) an object to the resulting temperature change.
Description : Which of the following has the maximum specific heat capacity? (1) water (2) piece of iron (3) piece of gold (4) chloroform
Last Answer : (1) water Explanation: The quantity of heat required to raise the temperature of a substance by one degree Celsius is called its specific heat capacity.
Description : Heat stored in water vapour is – (1) specific heat (2) latent heat (3) absolute heat (4) relative heat
Last Answer : (2) latent heat Explanation: Latent heat is the heat released or absorbed by a body or a thermodynamic system during a process that occurs without a change in temperature. A typical example is a ... the boiling of water. So water vapor which is the end product of evaporated water has latent heat.
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.
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
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.
Description : A kilogram of water goes from 90 degrees Celsius to 10 degrees Celsius in a period of 2 hours. If the specific heat of water is 4 kilojoules per kilogram per degree Celsius, how much heat has the water lost?
Last Answer : ANSWER: 320 KILOJOULES or 320,000 JOULES
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
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 : Heat stored in water vapour is (1) specific heat (2) latent heat (3) absolute heat (4) relative heat
Last Answer : latent heat
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
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
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.
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
Description : Which of the following criterion is used for any metal to be used as a cooking material? (1) More specific heat (2) More thermal conductivity (3) Less thermal conductivity (4) Less electrical conductivity
Last Answer : (3) Less thermal conductivity Explanation: A metal to be used as a cooking material should have less thermal conductivity.
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 : Adiabatic bulk modulus is equal to: A. Υ × P; where Υ: the ratio of the specific heat capacities of the gas, P: pressure B. Pressure C. The ratio of the specific heat capacities of the gas D. Υ ⁄ P; where Υ: the ratio of the specific heat capacities of the gas, P: pressure
Last Answer : Υ × P; where Υ: the ratio of the specific heat capacities of the gas, P: pressur