Question # 1

The highest melting point is observed by

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Butanoic acid

Propanoic acid

Pentanoie acid

HCI

To prepare ethane by Wurtz synthesis the suitable alkyl halide is

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Ethyl iodide

any alkyl iodide

Ethyl chloride

Methyl bromide

At absolute zero the molecules of hydrogen gas will have

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Only translatioral motion

Only vibrational motion

Only rotational motion

All the motion are ceased

Which of the following metal cannot evolve hydrogen from the acetic acid

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Sodium

Potassium

Magnesium

Copper

The instrument that is used to measure the pressure of a gas is called

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viscometer

photometer

barometer

stalagmometer

Naturally occurring isotopes of silver are

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,Two

, Four

, Forty seven

, sixteen

The steroids of fungi and yeast are called:

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Vitamin D

Vitamin D₂

Ergosterol

Cholesterol

The smallest unit of a crystal that shows all the characteristic properties of its pattern is called

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cell

electrolyte

unit cell

crystal

Why a C - Cl bond breaks by uv light

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Cl is most electronegative

Cl is volatile

C - Cl bond energy is smaller than that of C - H bond energy

Uv light provides energy which is sufficient to break C - Cl bond and not C - H bond

Cotton has cellulose in it:

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96%

97%

98%

99%

Which of the following is sweetest sugar

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Glucose

Maltose

Fructose

Sucrose

The carbon atom of a carbonyl group is

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Sp hybridized

Sp²hybridized

Sp³hybridized

None of these

Coal contains sulphur in it :

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1 - 3%

1 - 6%

1 - 9 %

1 - 12%

Which of the following is a constituent of nylon?

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Adipic acid

Styrene

Teflon

None of these

Those amino acids which contain two carboxylic groups are called ______ amino acids

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Acidic

Basic

Neutral

None of these

In the presence of Aluminium ethoxide, aldehydes get converted into esters. The reaction is known as

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Schmidt reaction

Aldol condensation

Beckmann's rearrangement reaction

Tischenko reaction

Which gas is not a constituent of atmosphere

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Xe

O₃

H₂

F₂

Eutrophication causes reduction in

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Dissolved hydrogen

Dissolved oxygen

Dissolved salts

All the above

Smallest particle of an element which may or may not have independent existence is known as:

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A molecule

An ion

An atom

An electron

Number of neutrons in heavy hydrogen atom is

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0

1

2

3

Substances that tend to decrease the activity of enzymes are called

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Coenzyme

Activators

Inhibitors

Apoenzyme

The elements like boron, chlorine, cobalt, copper etc are added in small amounts to the soil. They are called

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Macrountrients

Trace elemetns

Micronutrients

Additives

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