Chemistry- Matter around us

Which of the following are also considered to be states of matter?

• Plasma

• Platelets

• BEC (Bose Einstein Condensate)

• BHC

One of the following does not undergo sublimation. This one is

• Iodine

• Camphor

• Sodium chloride

• Ammonium chloride

When heat is constantly supplied by a gas burner with small flame to melt the ice, then the temperature of the ice during melting

• increases very slowly

• does not increase at all

• first remains constant then increases

• increases to form liquid water

When heat is constantly supplied by a burner to boiling water, then the temperature of the water during vaporization

• rises very slowly

• rises rapidly until the steam is produced

• first rises and then becomes constant

• does not rise at all

During summer days, water kept in an earthen pot becomes cool because of the phenomenon of

• diffusion

• transpiration

• osmosis

• evaporation

On converting 308K, 329K and 391K to Celsius scale, the correct sequence of temperature will be

• 33⁰C, 56⁰C, 118⁰C

• 35⁰C, 56⁰C, 119⁰C

• 35⁰C, 56⁰C, 118⁰C

• 56⁰C, 119⁰C, 35⁰C

Which of the following energy is absorbed during change of state of substance?

• Specific heat

• Latent heat

• Heat capacity

• Heat of solution

Which of the following factors are responsible for the change in state of solid carbon dioxide when kept exposed to air? (More than one option is correct)

• increase in pressure

• increase in temperature

• decrease in pressure

• decrease in temperature

During respiration, glucose and oxygen enter our body cells and waste products leave the body cells by the process of

• effusion

• osmosis

• diffusion

• plasmolysis

The evaporation of water increases under the following conditions

• increase in temperature, decrease in surface area

• increase in surface area, decrease in temperature

• increase in surface area, increase in temperature

• increase in surface area, increase in temperature, addition of common salt