IGCSE Cambridge Secondary Grade 10 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in


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Question-1 In a face centred cubic lattice, a unit cell is shared equally by how many unit cells?

(A) 8	(B)4
(C)2	(D)6

Question-2 Which on of the following statements is wrong for gases?

(A) Gases do not have a definite shape and volume.	(B)Volume of the gas is equal to volume of container confining the gas.
(C)Confined gas exerts uniform pressure on the walls of its container in all directions.	(D)Mass of gas cannot be determined weighing a container in which it is enclosed.

Question-3 A closed flask contains water in all its three states, solid, liquid and vapour at 0^oC. In this situation, the average kinetic energy of water molecules will be:

(A) the greatest in all the three states.	(B)the greatest in vapour state.
(C)the greatest in the liquid state.	(D)tthe greatest in the solid state.

Question-4
In van der Waals' equation of state for a non - ideal gas, the term that accounts for inter molecular forces is:

(A) (V - b )	(B) (RT)^-1
(C)	(D) RT

Question-5 The root mean square speeds at STP for the gases H₂, N_2, O₂ and HBr are in the order:

(A) H₂ < N₂ < O₂ < HBr	(B)HBr < O₂ < N₂ < H₂
(C)H₂ < N₂ = O₂ < HBr	(D)HBr < O₂ < H₂ < N₂

Question-6
Which is NOT true in case of an ideal gas?

(A) It cannot be converted into a liquid.	(B) There is no interaction between the molecules.
(C) All molecules of the gas move with same speed.	(D) At a given temperature, pV is proportional to the amount of the gas.

Question-7 Pressure remaining the same, the volume of a given mass of an ideal gas increases for every degree centigrade rise in temperature by definite fraction of its volume at:

(A) 0^oC	(B)absolute zero
(C)its critical temperature	(D)its Boyle's temperature

Question-8
A pure crystalline substance on being heated gradually first forms a turbid liquid at constant temperature, and still at higher temperature turbidity completely disappears. This behaviour is a characteristic of substances forming:

(A) allotropic crystals.	(B) liquid crystals.
(C) isomeric crystals.	(D) isomorphous crystals.

Question-9 Select the correct statement. In the gs equation pV = nRT:

(A) n is the number of molecules of a gas	(B)V denotes volume of one mole of the gas
(C)n moles of the gas have a volume V	(D)p is the pressure of the gas when only one mole of the gas is present

Question-10 When electrons are trapped into the crystalline anion vacancy, the defect is known as:

(A) Schottky defect	(B)Stoichiometric defect
(C)Frenkel defect	(D)F - centres

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Cambridge Secondary Grade 10

IGCSE

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