Question # 1

Which of the following fluorides of xenon in impossible?

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XeF₂

XeF₃

XeF₄

XeF₆

Natural fertilizer from plants and animals provide nitrogen

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1.5 kg

3.0 kg

4.5 kg

6 kg

Inert pair effect plays an important role in case of

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F

AI

Si

TI

In the equilibrium

N₂ + 3H₂ - 2NH₃ + 22 kcal the formation of ammonia is favoured by

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Increasing the pressure

Increasing the temperature

Decreasing the pressure

Adding ammonia

Which of the following value of ΔHf° represent that the product is least stable?

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-94.0 kcal mol^-1

-231.6 kcal mol^-1

+21.4 kcal mol^-1

+64.8 kcal mol^-1

Mark the smallest atom

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F

CI

Br

I

The rate of a reaction that does not involve gases does not depend upon

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Pressure

Temperature

Concentration

Catalyst

Hess's law deals with

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Changes in heat or reaction

Rate of reaction

Equilibrium constant

Influence of pressure on volume of a gas

Vital force theory was rejected by

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Berzelius

Kolbe

Wholer

Lavoiser

The number of unpaired electrons in the P-subshell of oxygen atom

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1

2

3

4

Propyne on hydrolysis in presence of H₂SO₄ and HgSO₄ gives

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Acetaldehyde

Actone

Formaldehyde

None

Which of the following is a colligative property?

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Melting point

Osmotic pressure

Freezing point

Sublimation temperature

ΔH_{neutralisation}is always

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positive

Negative

Zero

Positive or negative

Which is true for an element R present in group 13 of the periodic table?

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It is a gas at room temperature

It has oxidation state of +4

It forms R₂O₃

It forms RX₂

Dehydration of glycerol give

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Propane

Propene

Acrolein

Benzene

The number of atoms contained in 11.2 L of SO₂at 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

Octane number is zero for

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n-Heptane

Isooctane

n-Hexane

Isoheptane

Gooch Crucible used to filter the solution of

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H₂SO₄

HCI

KMnO₄

Both B & C

For the carbylamine reaction we need hot alc. KOH and

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Any amin and chloroform

Chloroform and Ag powder

A primary amine and chloroform

A mono alkyl amine and trichlorom-ethane

Bleaching action of bleaching powder is due to the liberation of

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O₂

OCl^-

Cl₂

Cl^-

The bond angle H-O-H in ice is closest to

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120° . 28'

60°

90°

109°

A solution of sodium sulphate was electrolysed using some inert electrodes. The products at the electrodes are

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O_2,H₂

O_2,Na

O_2,SO₂

O_2,S_2O^2-₈

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