Question # 1

When electricity is passed through moten Al₂O₃+Na₃AIF₆and 13.5 gms of Al are deposited, the number of faraday must be

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0.5

1.0

1.5

2.0

Number of elements present in the fifth period of periodic table is

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8

10

18

32

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

The addition of HBr is easiest with

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CH2 = CHCl

CICH = CHCl

CH3 - CH = CH2

(CH3)2 C = CH2

Gooch Crucible used to filter the solution of

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H₂SO₄

HCI

KMnO₄

Both B & C

Which of the following fluorides of xenon is impossible?

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XeF₂

XeF₃

XeF₄

XeF₆

The pure crystalline substance on being heated gradually first forms turbid liquid at constant temperature and still at higher temperature turbidity completely disapp-ears. The behaviour is a characteristic of substance forming

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Allotropic crystal

Liquid crystals

Isomeric crystals

Isomorphous crystals

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

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Mercury

Lead

Nitrogen oxide

Sulphur oxide

Acetic anhydride is obtained from acetyl chloride by the reaction of

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P₂O₅

H₂SO₄

CH₃COONa

CH₃COCH₃

Iron, once dipped in concentrated H₂SO₄, does not displace copper from copper sulphates solution, because

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It is less reactive than copper

A layer of sulphates is deposited on it

An inert layer of iron oxide is deposited on it.

All valence electrons of iron are consumed.

Causticisation process is used for the preparation of

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Caustic soda

Caustic potash

Baryata solution

Slaked lime

Reaction of acids with alcohols is also known as

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Esterification

Saponification

Alkalization

None

Galena is an ore of

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Gallium

Lead

Tin

Germanium

Ethyl chloride on treatment with aqueous alkali gives

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Ethane

Ethene

Ethanal

Ethanol

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

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Type of Bonding

Shapes

Shape and Type of bonding

None of above

Which of the following is directly related to Qualitative analysis?

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Identification

Separation

Measurement

Calculation

When a carbon atom forms single bonds with other carbon atoms, these hybird orbitals overlap with the orbitals of hydrogen to form four bonds which are

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Three sigma and one P_i

Two sigma andtwo P_i

One sigma and three P_i

Sigma

When quantity of electricity passed is one faraday then the mass deposited at the electrode is equal to

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One gm. atomic weight

One gm. equivalent weight

Electrochemical equivalent

None of the above

Alum is not used

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As a mordant in dyeing

As an insecticide

In purification of water

In tanning of leather

Which of the following imparts violet colouration to non-luiminous flame of Bunsen burner?

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NaCl₂

BaCl₂

CaCl₂

KCl

Hydrolytic conversion of sucrose into glucose and fructose is known as

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Induction

Inversion

Insertion

Inhibition

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