Question # 1

Which one of the following has the lowest boiling point?

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B

AI

Ga

Ti

The reaction/method that does not give an alkane is

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Catalytic hydrogenation of alkanes

Wurtz reaction

Hydrolysis of alkyl magnesium bromide

Dehydrohalogenation of an alkyl halid.

Isopropyl alcohol on oxidation forms

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Acetone

Ether

Ethylene

Acetaldehyde

When pressure is applied to the equilibrium system Ice Water Which of the following phenomenon will happen?

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More ice will be formed

Water will evaporate

More water will be formed

Equilibrium will not be formed

Cyclone collector is used for minimizing

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Radioactive pollution

Air pollution

Noise pollution

Water pollution

Which one is not usually used for the crystallization

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Acetone

Acetic acid

Sulphuric acid

Chloroform

The mass of the neutron is of the order of

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10^-23 kg

10^-24 kg

10^-26 kg

10^-27 kg

When electricity is passed through molten AI₂O₃ + Na₃AIF₆ and 13.5 gms AI are deposited,the number of faraday must be

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0.5

1.0

1.5

2.0

The number of atoms contained in 11.2 L of SO₂ at S.T.P are

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3/2 x 6.02 x 10²³

2 x 6.02 x 10²³

6.02 x 10²³

4 x 6.02 x 10²³

Propyne on hydrolysis in presence of H₂SO₄ and HgSO₄ gives

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Acetaldehyde

Actone

Formaldehyde

None

Vitamin A is present in

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Liver

Milk

Green vegetables

All

The formula to calcium cyanamide is

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Ca(CN)₂

CaC_2N

CaNCN

CaCHNH₂

Which one of the following elements occurs free in nature?

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N

P

As

Sb

Which of the following statement is correct if the intermolecular forces in liquids A, B and C are in the order A < B < C?

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B evaporates more readily than A

B evaporates less readily than C

A and B evaporates at the same rate

A evaporates more readily than C

Which is the most amphoteric?

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Na₂O

MgO

Al₂O₃

CaO

Which of the substances Na, Hg, S, Pt and graphite can be used as electrodes in electrolytic cells having aqueous solution?

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Na, Pt and graphite

Na and Hg

Pt and graphite only

Na and S only

The halide which is not hydrolysed is

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SiCl₄

SiF₄

CCl₄

PbCl₄

Octane number can be changed by

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Isomerisation

alkylation

Cyclisation

All of these

Ethanol containing some methanol is called

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Absolute spirit

Rectified spirit

Power alcohol

Methylated spirit

The number of electrons in the M shell of the element with atomic number 24 is

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24

12

13

8

The digestion of fats in the intestines is aided by

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Diffusion

Protection

Peptization

Emulsification

The wire in the flash bulbs is made up of

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Mg

Ba

Cu

Ag

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