Question # 1

Hypo is used to photography for

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Developing picture

Picture printed

The colour of picture

The fixation of picture

By using the fluted filter paper rate of filtration is

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Increased

Decreased

Filtration is constant

Having no effect

The pore size of filter paper depends upon

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Nature of the medium

Temperature of the medium

Size of particles

Mass of the particles

Tollen's reagent is

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Ammonical cuprous chloride

Ammonical cuprous oxide

Ammonical silver bromide

Ammonical silver nitrate

Which of the following is different from the other three oxides?

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MgO

SnO

ZnO

Cr₂O₃

Which for the following has greatest reducing power?

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Hl

HBr

HCl

Hl

For most of the chemical reactions the rate of reaction

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Increase as the reaction proceeds

Decrease as the reaction proceeds

May increase or decrease during the reaction

Remains constant as the reaction proceeds

Fluorine does not show positive oxidation states due to the absence of

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d-orbitals

s-orbitals

p-orbitals

None

In cold countries ethylene glycol is added to water in radiators of cars during winter. It results in

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Lowering in b.pt.

Reducing viscity

Reducing specific heat

Lowering in freezing pt.

The principal constituent of pyrex glass

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Zn

B

Pb

Cl

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.

The total number of protons in 10 g of calcium carbonate is (N₀= 6.023 x 10²³)

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1.5057 x 10²⁴

2.0478 x 10²⁴

3.0115 x 10²⁴

4.0956 x 10²⁴

The number of oxygen atoms in 4.4 g of CO₂is approximately

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1.2 x 10²³

6 x 10²²

6 x 10²³

12 x 10²³

Which of the following compounds has the lowest anion to cation size ratio?

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LiF

NaF

Csl

CsF

Which of the following with aqueous KOH will give acetaldehyde?

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1, 2-Dichloroethane

1, 1-Dichloroethane

Chloroacetic acid

Ethyl chloride

Acetic anhydride is obtained from acetyl chloride by the reaction of

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P₂O₅

H₂SO₄

CH₃COONa

CH₃COCH₃

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