TEST SERIES: CHEMISTRY Chapters 1,2

 Pathak’s Academy Spectrum 2022

TEST SERIES: CHEMISTRY

Chapters 1,2

Section A

Q.no.1) Multiple choice question                        of  7M

i) In body centered cubic structure the space occupied is about         a) 68%    b) 53%    c) 38%    d) 32%

ii) Close packing is maximum in the crystal lattice of     a) Simple cubic    b) Face centered     c) body centered    d) none 

iii) The major binding force in diamond is     a) Covalent bond    b) ionic bond    c) metallic bond     d) co-ordinate covalent bond

iv) The boiling point of water at high altitude is low because    a) Low temp.    b) Low pressure    c) high temp    d) high pressure

v) The temperature at which vapour pressure of a liquid becomes equal to atmospheric pressure is    a) melting point    b) boiling point    c) 273K    d) 373K

vi) Molal elevation  constant is elevation in boiling point produced by    a) 1g solute in 100g solvent        b) 100g solute in 100g solvent    c) 1mole solute in 1L of solvent    d) 1 mole of solute in 1kg of solvent

vii) Which of the following is not a colligative property?     a) vapour pressure    b) Depression in freezing point    c) elevation in boiling point    d) Osmotic pressure

Section B

Q.No.2) Solve any FOUR                                    8 M

i) Differentiate between tetrahedral and octahedral voids.

ii) A compound is formed by two elements M and N. The elements N formed ccp and atoms of M occupy 1/3rd of tetrahedral voids. What is the formula of the compound?

iii) Define Semi-permeable membrane and Osmotic pressure.

iv) Explain Raoult’s law .

v) What are the factors which affects the vapour pressure?

vi) Explain Schottky defect with example.

Section C

Q.No.3) Solve any FOUR                                12 M

i) Explain defects in crystal structure.

ii) Differentiate between Crystalline and Amorphous solids

iii) Define: Molarity, Normality and Molality.

Iv) 0.15 molal solution of substance boils at 373.23 K. Calculate molal elevation constant of water 

(given: boiling point of water is 373.15K ).

v) Explain laws of osmotic pressure.

vi) Describe TWO main types of conductors.

Section D

Q.No. 4) Solve any TWO                                    8M

i) Derive expression for Density of Simple cubic and Body centered cell.

ii) Give seven systems of crystal lattice with their edge length and angle specifications.

iii) What is lowering of vapour pressure? Explain with suitable experiment.

iv) Explain graphically depression of freezing point on addition of solute.