Question # 1

250cm of 0.2 molar potassium sulphate solution is mixed with 250cm of 0.2 molar KCI solution. The molar concentration of K ions is:

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0.2 molar

0.25 molar

0.3 molar

0.35 molar

covalent network of crystals has:

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lower melting point than molecular crystals

higher melting point than molecular crystals

H-bonding

Substance that does not show the process of sublimation is

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K2Cr2O7

iodine

naphthalene

NH4CI

Rigid rocky crust earth upto a depth of 100 km is called:

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Atmosphere

Hydrosphere

Lithosphere

All of these

Which compound shows the highest melting point

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water

Propanoic acid

Methanoic acid

Ethanoic acid

Which one of the following will react with bothethand and ethanoic acid at room temperature

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CaCO3

CuO

Na-metal

CH3OH

Glucose and fructose are isomers

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Chain isomers

Position isomers

Functional group isomers

Metamers

When a compressed gas is allowed to pass through a nozzle of a jet into a region of low pressure, it produces

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cooling

vaporization

fusion

expansion

Which one of the following enzymes brings about the hydrolysis of fats?

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urease

maltase

zymase

lypase

Which is unnecessary for purification of water for drinking purposes

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Coagulation

Aeration

Treatment with Iodine

Treatment with chlorine

Which one of the following is a water soluble vitamin?

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niacin

rioflavin

trypsin

ascorobic acid

Aldehydes give reactions :

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Oxidation and reduction

Base-catalysed nucleophilic

Acid catalysed nucleophilic

All of these

Energy of electron in first orbit of H atom is

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-45.32 KJ/mole

-82.08 KJ/mole

-52.53 KJ/mole

-1313.31 KJ/mole

Which reaction is too vigorous to control

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Chlorination

Bromination

Iodination

Fluorination

Sp³hybird orbitals are oriented at an angle of

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107.5°

108.5°

109.5°

103.5°

How many alcohol (including both structural isomers and stereoisomers) can have the molecular formula C₄H₁₀O

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3

4

5

6

The pH of 10^-3mole dm^-3of an aqueous solution of H₂SO₄is

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3.0

2.7

2.0

1.5

The rate constant k of a reaction activation energy Ea and temperature are related by Arrhenius in the form of an equation which is

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The elements in which d or f-orbitals are incomplete are called

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Transition elements

Typical elements

Actinides

lanthanides

In a primary alkyl halide, the halogen atom is attached to a carbon which is further attached to

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Only one carbon atom

Two carbon atoms

Three carbon atoms

one or no carbon atom

The voltaic or galvanic cells which cannot be recharged are called

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Primary cells

Secondary cells

Infinite cells

Fuel cells

How many zones through which the charge passes in a rotary kiln

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4

3

2

5

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