Question # 1

Reaction of alkyl halides with potassium cyanide in the presence of alcohols give:

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Carboxylic acids

Aldehydess

Alkyl nitriles

Acid amides

All of the following are hydroxy containing amino acids except

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Serine

Threonine

Valine

Tyrosine

In a crystal the atoms are locate at the position of:

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infinite potential energy

minimum potential energy

Zero potential energy

maximum potential

If temperature is 73K and volume is 146 cm3 then calculate the value of K=V/T

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5

4

3

2

If the volume of 2 moles of an ideal gas at 540 K is 44.8 litre then its pressure will be

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1 atmosphere

2 atmosphere

3 atmosphere

4 atmosphere

The factor responsible for lower mercury level in a capillary tube is

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High density

Surface tension

Liquid state

Metallic Colour

Which pair of transition elements shows abnormal electronic configuration?

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Sc and Zn

Cu and Sc

Zn and Cu

Cu and Cr

Only those metals can replace Hydrogen from dilute acids, which have

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High negative reduction potential

Low negative reduction potential

High positive reduction potential

low positive reduction potential

In elimination reaction i.e, in the formation of alkene, the reactivity of alkyl halide is in the order:

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CI>Br>I

I>Br>Cl

Br>CI>I

I>CI> Br

Global warming is mainly caused by ______ radiations

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UV

I.R

gama

X-rays

Dehydrogenase is an erample of

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Transferase

Hydrolase

Lyase

Oxido-reductase

Which orbital is in the process of completion in case of transition elements

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p-orbital

f-orbital

d-orbital

s-orbital

Maximum freezing point falls in

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Camphor

Naphthalene

Benzene

Water

In purification of potable water the coagulant used is:

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Nickel Sulphate

Copper Sulphate

Barium Sulphate

Aluminium Sulphate

The wave number of the light emitted by a certain source is 2 x 10⁶m^-1. The wavelength of this light will be

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500 nm

500 m

200 nm

5 x 10⁷m

AgCl is soluble is

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Aqua regia

H₂SO₄

HCl

NH₃

Vinyl acetylene combines with HCI to form

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Poly acetylene

Benzene

Chloroprene

Divinylacetylene

An organic compound 'X' on treatment with acidified K₂Cr₂O₇gives a compound 'Y' which reacts with I₂and sodium carbonate to form Triodomethane. The compound 'X' is

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CH₃OH

CH₃CHO

CH₃CH(OH)CH₃

CH₃COCH₃

The hydrocarbon which is used as an illuminating agent

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Methane

Methene

Methyne

B & C

The substances that are added to the soil to provide nutrient or assential elements required for plant growth, are called

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Additives

Fertilizer

Manures

Posticides

The chemical reactivity of glass is reduced by the use of

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Fluxes

Formers

Stabilizers

None of these

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

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Pb

Cr

Hg

All of these

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