Question # 1

In the cyclic structure of the glucose when the position of atoms on carbon 1 is called one isomer changes to other. These isomers of glucose are called:

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metamers

position isomers

cis-trans

annomers

The minimum temperature recorded by Kelvin scale is:

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273K

373K

Absolute scale is unable

0K to record this temperature

Amino acid produce α-hydroxy carboxylic acid when treated with

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KNO₃/HBr

Zn/HCI

NaNO₂/HCI

Pd/BaSO₄

Water bodies are included in:

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Atmosphere

Hydrosphere

Lithosphere

All of these

The water is considered to be polluted when the concentration of oxygen in it is

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6 - 9ppm

6 ppm

8 ppm

Less than 4pm

As the number of carbon atoms increases the number of isomers also increase. The 5 C compound pentane has as many as

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3 isomers

5 isomers

6 isomers

10 isomers

Which of the following solids has a simple molecular lattice?

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magnesium oxide

sodium

silicon(IV) oxide

sulphur

In Boyle's law which of the following pair is variable:

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Temperature and quantity of a gas.

Pressure and volume.

Volume and quantity of a gas.

Pressure and quantity of a gas.

If the volume term is present in denominator of Kc expression, then which one is correct

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Increase in pressure will shift the reaction backward

Increase in pressure will shift the reaction forward direction

Decrease in volume will shift the reaction forward direction

Reaction will not effected

A basic buffer solution can be prepared by mixing

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Strong acid and its salt with weak base

Weak base and its salt with strong acid

Strong base and its salt with weak acid

Weak acid and its salt with strong base

Which of the following alkyl halides undergoes SN1 reaction fastest

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Methyl chloride

Isobutyl chlorido

Ethy l chloride

Tertiary butyl chloride

The relative abundance of Pb isotopes is 1.5% Pb²⁰⁴, 23.6% Pb²⁰⁶, 22.6% Pb²⁰⁷, 52.3% Pb²⁰⁸The relative atomic mass of Pb is

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207.94

208.24

206.94

207.24

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 viscosity

Reducing specific heat

Lowering in freezing pt

Reduction with aluminium isopropoxide in excess of Isopropyl alcohol is called Meerwein Ponndroff-Verley reduction (MPV). What will be the final product when cyclohex-2-enone is selectively reduces in MPV reaction?

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Cyclohexanol

Cyclohex-2-enol

Cyclohexanone

Benzene

In purification of potable water the coagulant used is:

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Nickel Sulphate

Copper Sulphate

Barium Sulphate

Aluminium Sulphate

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2, 2, 4-trimethylpentane

2, 4, 4-trimethylpentane

2, 4, 4-methyepentane

2, 2, 4-methylpentane

The isomers due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called

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Functional isomers

Position isomers

Chain isomers

Metamers

N₂ + O₂ ⇌2NO

The unit of K_c for tis reaction will be:

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No unit

mol^-2 dm^-3

mol^-1 dm^-3

mol^-2 dm⁺³

Which element does not belong to 3d transition series

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Ti

V

Mn

Te

The gasoline with high octane No. has ______

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More knocking

Less knocking

No knocking

Only knocking

B-atom in BF₃has

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sp³hybridization

sp²hybridization

sp hybridization

no hybridization

Sodium can be obtained by :

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Electrolysis of acidified water.

By heating NaCl and water at 100°

Electrolysis of molten sodium chloride.

Electrolysis of aqueous sodium chloride.

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