PHYSICS [HEAT]

Question 1

Evaporation is rapid on a wet day

Answer 1

FALSE

Question 2

Evaporation takes place only from the surface of the liquid

Answer 2

TRUE

Question 3

All molecules of a liquid take part in the process of evaporation

Answer 3

FALSE

Question 4

Temperature of a liquid rises during boiling

Answer 4

TRUE

Question 5

All molecules of a liquid take part in boiling

Answer 5

TRUE

Question 6

Boiling is a rapid phenomenon

Answer 6

TRUE

Question 7

All solids expand to the same amt when heated to the same rise of temperature

Answer 7

FALSE

Question 8

Telephone wires are kept tight between the 2 poles in winter

Answer 8

TRUE

Question 9

Equal volume of different liquids expand by different amounts when they are heated to the same rise in temperature

Answer 9

TRUE

Question 10

Solids expand the least and gases expand the most on being heated

Answer 10

TRUE

Question 11

A mercury thermometer makes use of the thermal expansion of liquids on heating

Answer 11

TRUE

Question 12

Boiling occurs at _______

Answer 12

100 DEGREE CELCIUS

Question 13

Evaporation takes place at ___________

Answer 13

ALL TEMPERATURES

Question 14

The molecules of liquid ______ heat from surrounding

Answer 14

ABSORB

Question 15

Heat is ____ during boiling

Answer 15

ABSORBED

Question 16

Cooling is produced in _______

Answer 16

EVAPORATION

Question 17

A longer rod expands_____ than a shorter rod on being heated to the same rise of temperature

Answer 17

MORE

Question 18

Liquids expand____ than the solids

Answer 18

MORE

Question 19

Gases expand _______ than liquids

Answer 19

MORE

Question 20

Alcohol expands______ than water

Answer 20

MORE

Question 21

Iron expands____ than copper

Answer 21

LESS