Question # 1

Heating a micture of sodium benzoate and soda lime gives

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Benzene

Methane

Sodium benzoate

Calcium benzoate

Hydrogen chloride molecule contains

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Covalent bond

Double bond

Co-ordinate bond

Electrovalent bond

The rate at which a substance reacts depends on its

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Atomic weight

Equivalent weight

Molecular weight

Active mass

Oleum is

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Castor oil

Oil of vitriol

Fuming of H₂SO₄

None of them

With increasing principle quantum number, the energy difference between adjacent energy levels in H atom

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Decreases

Increases

Remain constant

Decreses for low value of Z and increases for higher value of Z.

Bragg's law is given by equation

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nλ= 2θsinθ

nλ= 2 d sinθ

2 nλ= d sinθ

nλ= 1/2 d sinθ

Inert pair effect plays an important role in case of

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F

Al

Si

Tl

By using the fluted filter paper rate of filtration is

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Increased

Decreased

Filtration is constant

Having no effect

Atmosphere of big/metropolitan cities is polluted most by

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Automobile exhausts

Pesticide residue

Household waste

Radio-active fall out

The most reactive compound for electrophilic nitration will be

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Benzyl chloride

Benzoic acid

Nitrobenzene

Chlorobenzene

Bond angle is minimum for

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H₂O

H₂S

H₂Se

H₂Te

Which of the following nitrogen fertilizer contain more nitrogen

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NaNO₃

KNO₃

NH₄NO₃

Urea

Which of the following possesses the highest melting point?

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Chlorobenzene

o- Dichlorobenzene

m-Dichlorobenzene

p-Dichlorobenzene

Hybridization explain the ----------- of orbitals

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Type of Bonding

Shapes

Shape and Type of bonding

None of above

A zero order reaction is one whose rate is independent of

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Temperature of the reaction

The concentration of the reactants

The concentration of the products

The material of the vessel in which the reaction is carried out

Aluminothermy used for on the spot welding of large iron structure is based upon the fact that

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As compared to iron, aluminium has greater affinity for oxygen

As compared to aluminium, iron has greater affinity for oxygen

Refraction between aluminium and oxygen is endothermic

Reaction between iron and oxygen is endothermic.

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