Question # 1

Silk is the example of:

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mineral fiber

vegetable fiber

animal fiber

none of above

Octyl acetate has the flavor of

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Orange

Pineapple

Banana

Apple

Which is not an enzyme

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Transverses

Lipase

Lyase

None of these

Why is carbon monoxide called as pollutant? The reason is that

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It combines with oxygen

It combines with haemoglobin

It inactivates glycolysis

It inactivates nerves

Three elements needed for the healthy growth of plants are

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N P K

N K C

N S P

N Ca P

Optimum PH rang for amylases is

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6 - 6.4

6.4 - 6.6

6.4 - 6.9

6.6 - 6.9

Point out the substance which has maximum vapour pressure at a given temperature?

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Acetone

Water

Ethanol

Acetic acid

The reaction which is responsible for the production of electricity in the voltaic cell is

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Hydrolysis

Oxidation

Reduction

Redox

Coagulation in the purification of water is carried out by

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Alum

NiSO₄

BaSO₄

CuSO₄

Which of the following are more temperature senesitive

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Liquid crystals

Solid crystals

Ionic stals

None of above

The proteins which are derived by conjugated proteins are called as

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Simple protein

Complex protein

Derived protein

None

Alkyl halides are considered to be very reactive compounds towards nucleophiles because

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They have an electrophilic carbon

They have an electrophilic carbon and a good leaving group

They have an electrophilic carbon and a bad leaving group

They have a nucleophilic carbon and a good leaving group

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A primary alcohol

A secondary alcohol

An eher

A phenol

The spectrum of He is expected to be similar to that of

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H

Na

He⁺

Li⁺

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

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Decreases

Increases

Remains constant

Decreases for low value of Z and increase for higher value of Z

In which type of following solutions we don't know the total volume of the solutions :

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Percentage weight/weight

Percentage weight/volume

Percentage volume/volume

Percentage volume/weight

The value of R(General Gas Constant) is

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8.3134 JK^-1mole^-1

1.987 Cal K^-1Mole^-1

Both a and b

1.987 JK^-1mole^-1

Which isomers of C₅H₁₁OH gives, on dehydration, the greatest number of different alkenes

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Hydrolysis of alkyl nitriles gives:

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alkane

alkyl halide

alkyl nitride

carboxylic acids

Reason of pollution are:

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Population and Urbanization

Transportation

Urbanization industrialization

All of these

During nitration of benzene, the active nitrating agent is

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NO3

NO2+

NO2-

HNO3

Chromyl chloride and toluene react to produce

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p-chlorotoluene

Benzaldehyde

Benzyl chloride

Bezoic acid

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