Question # 1

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

Total number of possible chain and positional isomers of butyl alcohol among alcohols are

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Four

Five

Two

Six

The optimum pH value for the enzyme ''Pepsin'' is:

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2

8

10

1.4

The potential difference set up at 25 C and 1 atm when clectrode is dipped m Tis one molar ionic sohution is called

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Single electrode potential

electrode potential

Standard electrode potential

Standard hydrogen electrode

Carboxylic acid having more than one carboxyl group are called:

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Mono-carboxylic acid

Di-carboxylic acid

Tri-carboxylic acid

Poly carboxylic acid

Which of the following is incorrect for glucose & sucrose

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Both are water solube

Natural polymers

Source of energy

Carbohydrate in nature

The major binding force of diamond,silicon and quartz is

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Electostatic force

Electical attraction

Ceobalent bond force

Non convalent bond force

Heat balance of earth is maintained by sphere:

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Hydrosphere

atmosphers

lithosphere

biosphere

Which alcohol is most reactive towards sodium metal?

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Ter Butyl alcohol

n-Propyl alcolol

Isopropyl alcohol

Have same reactivity

The value of general gas constant R is derived from:

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Newton's Cooling law

Maxwell's law

Avogadro's law

Charle's law

Ionic crystals are brittle because

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they have cubic geometry

they are bad conductors of electricity

coordination number of cations and anions is same

cations and anions are arranged in alternate positions in layers

Which one of the following pentafluorides cannot be formed?

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PF₅

AsF₅

SbF₅

BiF₅

The total number of transition elements is

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10

14

40

50

When an electric current is passed through discharge tube at low pressure, cathode rays are emitted from cathode these rays consist of:

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Alpha rays.

Negative particles.

Electromagnetic rays.

Positive particles.

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Shift reaction toward forward direction

Shift reaction backward

Lower the value of K_c

No change in reaction

The alkali metals form

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Ionic bond

Covalent bond

Co-ordinate bond

H-bond

Which statement is not correct

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Enzymes catalyst a specific reaction

Enzymes show catalytic activity at a specific temperature

The catalytic activity of enzymes is stopped if optimum pH is changed

The catalytic activity is poisoned by a co-enzymes

The four quantum numbers of the valency electron of potassium are

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4,1,1,1/2

4,0,0,1/2

4,1,0,1/2

4,4,0,1/2

The percentage of H is the highest in

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CH₄

NH₃

H₂SO₄

C₆H₁₂O₆

A current of 9.65 ampere flowing for 10 minutes deposits 3.0 g of the metal which is monovalent. The atomic mass of the metal is

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10

50

30

96.5

The development of disagreeable odur in fats or oil is called

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Fragrance

Perfume

Rancidity

Smell

In Millikan method for determination of charge on electron the air in the chamber is ionized by

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Protons

Electric field

X-rays

a - particles

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