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Heat and thermodynamics

Q.1) Therm is the unit of

(A) Power

(B) Heat

(C) Light

(D) Distance

Q.2) Ice is packed in sawdst because

(A) Saw dust does not stick to the ice

(B) Saw dust will not get melt easily

(C) Saw dust is a good conductor of heat

(D) Saw dust is a poor conductor of heat

Q.3) Water is used in hot water bags because

(A) It is easily available

(B) It is cheap and not harmful

(C) Its specific heat is more

(D) Water can be heated easily

Q.4) Which of the following metal has the maximum thermal conductivity?

(A) Iron

(B) Aluminium

(C) Copper

(D) Silver

Q.5) A body absorbs maximum amount of heat when it is

(A) Black and rough

(B) Black and smooth

(C) White and rough

(D) White and smooth

Q.6) Heat of a reaction does not depend upon

(A) Temperature of reaction

(B) Path by which final product is obtained

(C) Physical state of product and reactant

(D) Reaction takes place at constant pressure or constant volume

Q.7) In winter season water coming out of hand pumps is hot because

(A) In winter our body temperature remains low, so water makes us feel hot.

(B) Inside the earth temperature is more than the atmosphere temperature

(C) Due to pumping function is produced which causes heat and makes water hot

(D) Water comes out from the earth and gains the heat from surroundings

Q.8) Which of the following causes more burn?

(A) Boiling water

(B) Hot water

(C) Steam

(D) None of these

Q.9) The direction of flow of heat between any two system depends on

(A) Their specific heat

(B) Their latent heat

(C) Their individual temperature

(D) Amount of heat they contain individually

Q.10) Due to the horizontal motion of air, transfer of heat is known as

(A) Advection

(B) Convection

(C) Conduction

(D) Radiation

ਜੇਕਰ ਤੁਸੀ ਕਿਸੇ ਵੀ ਸਰਕਾਰੀ ਨੌਕਰੀ ਬਾਰੇ ਜਾਣਕਾਰੀ ਲੈਣਾ ਚਾਹੁੰਦੇ ਹੋ ਤਾ ਉੱਤੇ ਦਿੱਤੇ ਕੰਮੈਟ ਬਾਕਸ ਵਿੱਚ ਕੰਮੈਟ ਕਰ ਸਕਦੇ ਹੋ ਧੰਨਵਾਦ ਅਰਨ ਮਨੀ ਜੋਬਜ ਟੀਮ