Question

1. Multiple choice questions 1 X 15 = 15

1.1.The standard room temperature is taken as

a. 00C b.298 K c.273 K d. 200 C.

1.2.The process of evaporation causes

a. Heating

b. Cooling

c. increase in temperature

d. none of these.

1.3.The quantity of matter present in an object is called its

a. Weight b. gram c. mass d. density.

1.4.Which has the least energetic molecules?

a. Solids b. liquids c. gases d. plasmas

1.5.Of the following, what is the densest state of matter?

a. solids b. liquids c. gases d. vapours

1.6.SI unit of temperature is

a. Kelvin b. Celsius c. both (a) and (b) d. none of these.

1.7.The forces of attraction between the particles of matter is maximum in

a. Iron rod b. kerosene oil c. glycerine d. dry air.

1.8.When ice melts to water, then heat is

a. Absorbed b. evolved c. no change d. depends on conditions.

1.9.Ice floats on the surface of water because

a. It is heavier than water

b. The density of both water and ice is the same

c. Ice is lighter than water

d. None of these.

1.10.Evaporation of a liquid can take place

a. At its boiling point

b. Below its boiling point

c. At all temperatures

d. At a fixed temperature.

1.11.Which one of the following is correctly is matched?

a. Emulsion – curd

b. Foam – mist

c. Aerosol – smoke

d. Solid sol – cake

1.12.Which gas present in air has the highest boiling point?

a. Oxygen b. nitrogen c. argon d. hydrogen​

Answer 1

Answer:

what is this much big ha