Question # 1

The nature of crystal of diamond is

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metallic

molecular

covalent

ionic

Enthalpy of neutralization (∆H°n) per mole of H2SO4/ Ba(OH)2 is

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+57.4 kJmol-1

-114.8 kJmol-1

-57.4 kJmol-1

Which of the following is an example of body centred cube?

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Magnesium

Zinc

Copper

Sodium

The weight of 11.2 liters of CO₂ at S.T.P would be

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88 g

44 g

32 g

22 g

Reaction kinetics is important to discover the---under which reaction will proceed most economically:

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rate constant

Conditions

volume

equilibrium point

Bonding in MgO is an example of

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lonic bond

Polar bond

Covalent bond

Coordination covalent bond

Matter having no definite shape and volume is called:

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gas

liquid

solid

plasma

Which one of following elements is not present in all proteins?

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Carbon

Hydrogen

Nitrogen

Sulphur

Which of the following are responsible for the colour developed in transition elements compounds?

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s-orbitals

p-orbitals

d-orbitals

f-orbitals

If temperature is 73K and volume is 146 cm3 then calculate the value of K=V/T

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5

4

3

2

Identify the linear polymer out of following

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Amylose

Amylopectin

Starch

Glycogen

Which of the following will have the highest boiling point?

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Methanal

Ethanal

Propanal

2-Hexanone

Chemical composition of colemnite is:

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Ca₂B₆O₁₁.5H₂O

CaB₄O₇ .4 H₂O

Na₂B₇O₇. 4 H₂O

CaNaB₅O₉.8H₂O

The weight of pure NaOH required to prepare 250 cm³of 0.1 N solution is

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4 g

1 g

2 g

5 g

A condensation polymer among the following is

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Dacron

PVC

Polysterene

Teflon

The molal elevation constant is the ratio of the elevation in boiling point to

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Molarity

Molality

Mole fraction of solute

Mole fraction of solvent

n + l value for 4f will

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2

5

7

9

Addition of iron fillings to CuSO₄solution caused precipitation of Cu owing to the

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Reduction of Cu²⁺

Oxidation of Cu²⁺

Reduction of Fe

Reduction of Fe³⁺

Which of the following molecules have sp³hybridized carbon

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CH₄

C₂H₄

C₂H₂

CO₂

The nature of interparticle forces in benzene is

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Dipole-dipole interaction

Dispersion force

Ion-dipole interaction

H-bonding

Hemoglobin contains nearly:

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10,000 atoms

100 atoms

1000 atoms

1 atom

In passage of electricity through aqueous solution of AgNO₃silver dissolves at anode to form Ag⁺, the electrodes are

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Silver metal

Pt metal

Graphite

Copper metal

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