Question

1. Select the most appropriate answer

(i) In the gaseous state, molecules can move:
(a) only in one direction
(b) only in a fixed direction
(c) randomly in all directions (d) upwards and downwards only

(ii)The force of attraction between the molecules is maximum:
(a) in solids
(b) in liquids
(e) in gases
(d) in all the three states

(iii) When a gas is compressed, its pressure:
(a) increases
(b) decreases
(c) remains the same
(d)none of these

(iv)The volume of a certain mass of a gas at constant temperature is:
(a) directly proportional te pressure
(b) inversely proportional to pressure
(c) remains the same
(d) none of these

(v)Which of the following is incorrect about plasma?
(a) Fluorescent tube and neon sign bulbs consist of plasma.
(b) The gas gets ionised when electrical energy flows through it.
(c) It consists of super-energetic and super-excited particles.
(d) The plasma glows with colour which does not depend upon nature of gas.

(vi) The colour of vapours formed on sublimation of iodine solid is
(a) Purple (violet)
(b) Colourless
(c) Yellow
(d) Orange​

Answer 1

Answer:

(i) c

(ii) a

(iii) a

(iv) b

(v) d

(vi) a