Question # 1

Substances that render enzymes catalytically inactive are called

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coenzymes

substrates

inhibitors

apoezymes

a hole used to dump the municipal wastes is called:

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landfill

effluents

leachate

inclneration

Polarity of a molecule is expressed in terms of

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Bond strength

Dipole moment

Bond length

Shape

What is the formula of silica?

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Si2O3

SiO2

Si3O4

SiO-

Reason for the rancidity of fat is

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Low sponification

High reactivity of fat

Oxidation of fat

All

Empirical formula of monosaccharide is

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(CHO)_n

CH_nO_n+1

C_nH₂O

(CH₂O)_n

_{What is name of hydrated variety of quartz?}

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Rose quartz

Smokey quartz

Silica

Opal

Lithosphere has amount of silicon

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35.30%

27.72%

40.01%

21.13%

N terminal of glutathione is

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Glycine

Cysteine

Glutamate

Aspartate

The slope of the graph is steepest at the beginning of reaction showing

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Rapid decrease in concentration of reactants

Rapid increase in concentration of reactants

Fast rate of reaction

All of the above

One Pascal is equal to

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1 Nm^-2

1 Nm

1 Nm^-1

1 Nm²

Reaction of Grignard's reagent with ketones gives: Reaction of Grignard's reagent with formaldehyde gives:

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Pri-alcohol

Sec-Alcohol

Ter-alcohol

Carboxylic

The total number of orbitals possible for the quantum number n is

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n

n²

2n

2n²

The unit rate of constan K ismole^-1 dm³S^-1for a chemical reaction, the order of reaction is :

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3

2

1

0

An alkane is produced when an alkyle halide reacts with zinc in the presence of

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HCl

CH₃COOH

Both a & b

None

Detergents are

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Synthetic products

Natural products

Both (a) and (b)

None of these

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

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Ag⁺

Cu²⁺

Al³⁺

Si⁴⁺

Bronze is an alloy of Cu and

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Zn

As

Sb

Sn

A cell constant is generally found by measuring the conductivity of aqueous solution of

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BaCl₂

KCl

NaCl

MgCl₂

If the difference of pKa values of the two acids is 2, then

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Acid with smaller pKa is 10 times stronger acid

Acid with greater pKa is 10 times stronger acid

Acid with smaller pKa is 100 times stronger acid

Acid with greater pKa is 100 times stronger acid

The Zwitter ion is also called

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International salt

Internal salt

No salt

None of these

The treatment of benzene with isobutene in the presence of sulphuric acid give

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isobutyl benzene

tert-Butyl benzene

n- Butyl benzene

no reaction

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