21. Water stored in earthenware cools because
Earthenware has high heat capacity
Earthenware is a good radiator of heat
Water oozing out of the pores evaporates
Earthenware absorbs heat from water
22. The quantity of water vapour the atmosphere can hold
is independent of temperature
increases with increase of temperature
decreases with increase of temperature
fluctuates with increase of temperature
23. The hygrometer is an instrument to measure
The relative density of liquids
The purity of milk
Relative humidity
Atmospheric pressure
24. A lunar eclipse occurs when
The sun, the moon and the earth are not in the same line
The moon comes between the sun and the earth
The earth comes between the sun and the moon
The sun comes between the earth and the moon
25. Milk tastes sour when kept in the open for some time due to the formation of
Carbonic acid
Citric acid
Lactic acid
Malic acid