Question # 1

Elastic collision involves:

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gain of energy

loss of energy

no relationship between elastic

no gain or loss of energy

When enzyme fumarase is exposed to UV light, then

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Its activity is enhanced

It converts into Glucokinase

It is inactivated

None

What can be deduce about two gases which have the same molecular mass:

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They have same numbers of atoms in a molecule

They have same rate of diffusion

They have same boiling points

They have equal solubility in water at room temprature

Zine does not show variable oxidation state, because

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Its d-subshell is incomplete

Its d-subshell is complete

It is relatively soft metal

It has two electrons in outermost shell

Which compound shows the highest melting point

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water

Propanoic acid

Methanoic acid

Ethanoic acid

.Both aldehydes and ketones are planar to the neighborhoods of carbonyl (C-0) group. Which one of the following bonds is distorted towards the oxygen atoms?

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pi-bond of C and O

Sigma bond of C and O

Sigma bond of C and H

Sigma bond of C and C

pH of an aqueous solution is 3.0 at 25°C. The hydrogen ion concentration in the solution would be

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0.001

0.01

0.0001

10(-5)

Ti+3 shows minimum absorption (maximum transmittance) at-------and-------wavelength

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Yellow, Green

Red. Yellow

Blue. Green

Red. Blue

Mercury does not wet the glass because of

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repulsion

weak cohesive force

high viscosity

capillary action

Which of the following has the lowet solubility in water

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НСOOH

CH3СООН

CH3-CH2-СООН

C3H7-COOH

The examples of a hexagonal system is

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sugar

graphite(a=b not equal to c) {Alpha =beta. not equal to gamma}

sulphur

diamond

Positive particle in discharged tube is produced by ionization of gas molecules, which is caused by

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Gas molecules collide with anode

Gas molecules are at high temperature

Gas molecules produce X-rays

Cathode rays remove electrons from gas molecules

The vant Hoff factor (1) accounts for

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Degree of solubilisation of solute

The extent of dissolution of solute

The degree of decomposition of solution

The unit of the rate constant is the same as that of rate of reaction in :

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Third order reaction

Second order reaction

First order reaction

Zero order reaction

The functional group of acid amide is

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Among the lanthandes the one obtained by synthetic method is

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Lu

Pm

Pr

Gd

When vapours of isopropyl alcohol are passed over heated copper, the major product obtained is

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Propane

Propylene

Acetaldehyde

Acetone

Monocarboxylic acids exist as dimer because of

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Dipole-dipole attraction

Hydrogen bonding

Van der Waals forces

Conhesive forces

Hybridization of each carbon atom in benzene ring is

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sp hybridized

sp²hybridized

sp³

dsp²

A nucleoside may be

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Ribonuleoside

Deoxyribonucleoside

Both a and b

None

Which of the statements given below concerning properties of solution, describe a colligative effect?

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Boiling point of pure water decreases by the addition of ethanol

Vapour pressure of pure water decreases by the addition of nitric acid

Vapour pressure of pure benzene decreases by the addition of naphthalene

Boiling point of pure benzene increases by the addition of toluene

An ion bearing positive charge is called:

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Cation

Positron

Anion

None of above

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