Question # 1

Stronger the intermolecular forces

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Lower the Vapour pressure

Greater the Vapour pressure

May be smaller or greater

None

What is the formula of talc or soapstone?

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Na2B4O7.10H2O

H2Mg3(SiO3)4

Cu2S

NaNO3

A gas is heated in such a way that its volume and absolute temperature both are doubled. the pressure of gas:

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Becomes 4 time

Becomes half

Becomes 2 time

Remains same

LiF is a crystalline substance and has

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ionic crystal

metallic crystal

covalent crystal

molecular crystal

Styrene has empirical formula CH, and there is 92.2%C and 7.75% hydrogen. If molar mass is 104g mol¯, what will be integral multiple (n) to get molecular formula:

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2

4

6

8

What is clinker?

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Roasted calcareous material

Roasted calcareous & argelarious material

Roasted argillaceous material

Roasted gypsum

Which is not a calcareous material?

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lime

clay

marble

marine shell

Dehydrohalogenation of secondary butyI bromide will give

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Propene

1-Butene

Butene

2-Butene

Which ion has maximum number of unpaired electrons in 3d subshell and shows maximum paramagnetic behavior?

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Cr+3

Ni+2

Co+2

Fe+3

Which one of the following statements about diamond is not true?

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the coordination number of carbon atoms is 4

diamond is an isotpe of graphite

diamond has a high melting point

diamond has a rigid tetrahedral, structure

Volume of O₂gas at 0°C is 273 cm³, then volume of O₂gas at -10°C is

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263 cm³

163 cm³

173 cm³

73 cm³

Which of the following molecules has a net dipole moments

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CO₂

CS₂

SO₂

CCI₄

Acetic Acid reacts with PCl₅ giving:

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Acetamid

Acetyl chloride

Alcohol

ether

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-1.10 V

+1.10 V

-0.42 V

+0.42 V

The charge of an electron is determined by

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J.J. Thomson

Crooks

Perrin

R.A.Millikan

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Hear of reaction

Heat of formation

Heat of neutralization

Heat of combustion

which one of the following is not a nucleophile?

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H₂O

H₂S

BF₃

NH₃

In exothermic reversible reaction increase in temperature shift the equilibrium to :

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Remains unchanged.

Product side.

Reactant side.

None of above.

General formula of aliphatic carboxylic acids:

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R---OH

R----COH

R----CO---R

RCOOH

Palmitic acid & steanic acid ae obtained from process of fats & oils:

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Reduction

Neutralization

oxidation

hydrolysis

Which of the following molecules has zero dipole moment?

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NH₃

CHCl₃

H₂O

BF₃

The normal amount of overhead ozone is about

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250 Du

300 DU

350 DU

400 DU

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