Flash Card
3.5 kcal = ............. .
Latent heat is evolved during the transformation of liquids into solids." How will you explain this statement?
While deciding the unit for heat, temperature interval chosen is
When latent heat is released or given off from a substance, it results into ............ .
Small white trail in sky behind back of flying aeroplane indicates
Hot liquids get cooled faster .............. .
In temperature range of o "C to 4 °C, at ......... volume of water is maximum due to expansion.
An example observed as a consequence of attaining the dew-point temperature is
If two ice cubes are pressed against each other. they stick together firmly after some time because ............. .
The amount of heat energy to be supplied to convert 2 kg of ice at 0°C completely into water at 0 °C if latent heat of fusion for ice is 80 cal/g is........ .
With increased height from sea level, melting point of solids which expand on solidifying .......... .
In cold countries in winter, water carrying pipes sometimes break, because
Due to constant ................ of water, water vapour is always present in the atmosphere.
When ice of 0 °C is heated to convert into steam, for what values of temperature thermometer dipped into ice shows constant reading for some time?
The vapour content in the air is measured using a physical quantity called .......... .
Water is heated from 0 °C to 10 °C, then it volume
The constant temperature at which liquid converts into gas is called its ............
SI unit of specific heat capacity is
During transformation of liquid phase to solid phase, the latent heat is ............. .
If a substance expands on solidifying, then application of pressure ............ .
From the options given below, the specific heat of ................... is maximum.
When latent heat of phase transformation from solid to gaseous state is studied for ice, for temperature range of 20 °C to 80 °C, graph of temperature versus time is
.................. heat is necessary to raise 1 kg of water from 14.5 °C to 15.5 °C.
When boiling point of water is reached,
The amount of heat necessary to raise the temperature of 1 g of water by 1 °C from 14.5 °C to 15.5 °C is called
Tiny drops on window pane of car at dawn in winter indicates ............... temperature is attained.
Heat is liberated when ............ .
Choose the correct option:
The air is said to be unsaturated if vapour contained in a given volume of air at a temperature
In the experiment to study the effect of heat on ice, what will be the maximum rise in temperature of water?
When the air contains maximum possible water vapour, it is said to be ................. with vapour at that temperature.
Which of the following substances has negative melting point?
When air is saturated with vapour, .................. vapour condenses on the surface of objects in the form of water droplets
Relative humidity has no units because ............ .
Absolute humidity is measured in ............ .
Latent heat of fusion is 80 cal/g. How much wit it be in kJ/kg?
The amount of heat energy absorbed at constant temperature by unit mass of a solid to convert into liquid phase is called the ............. .
In Hope's apparatus, while studying anomalous behavior of water, water with higher temperature ........ .
When water in the ice trays in a refrigerator freezes to form ice .......... .
Relative humidity of air at dew point is ......... .
The increase in temperature of water above its boiling point in the pressure cooker is due to change in .............. .
Which of the following is not a unit of heat?
Water expands on reducing its temperature below ............°C.
If objects of equal masses are given equal heat, their final temperature will be different. This is due to difference in their ............ .
By studying anomalous behavior of water using Hope's apparatus, it is concluded that
While heating ice and water mixture, it is stirred continuously.
Fomenting bottles are used with hot water because
Heat energy absorbed by water at 100 °C during transformation into steam is called its
Latent heat per unit mass of a substance is its.............. .
The moisture in the atmosphere is called
