Question # 1

Among the elements of second period the element with highest melting point belongs to group.

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1

14

17

18

The boiling point of water is unexpectedly high because.

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H2O molecule in linear

Sp3 hydrogen bonding is involved in the formation of water

There is hydrogen bonding and consequent association of H2O molecules.

Oxygen is the first member of the VI group

Which of the following specie is stronger acid than formic acid, HCOOH, in aqueous solution.

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CH3COOH

NH+4

H2SO-3

H4P2O7

Stainless steel consists of which elements.

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Fe only

Cr only

Fe and Ni

Fe ,Ni and Cr

According to the Langumir isotherm , when the pressure of the gas is very large, the adsorption.

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Is directly proportional to pressure

Is inversely proportional to pressure

Is directly proportional to the square of the pressure.

Is independent of pressure

Which of the flowing operator combination would yield eight value equation

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d/x (sin x)

d/dx (cos x)

d /dx (sin 4x)

d /dx (cos 4x)

d/dx (e^x)

Which of the following analytical method is based on scattering of radiation.

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Emission spectroscopy

Colorimetry

Turbidimetry

Polarimetry

HCIO evolves Cl2 and O2 when dissolve

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Ca

Ni

Cu

Any of above

Ozone filters out radiation below.

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o

1000 A

o

2000 A

o

3000 A

o

4000 A

Alums are generally used

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In Dying and water proofing of fabric

In arrest bleeding

IN water purification

All above

Which of the following molecules belongs to C_av point group.

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H2O

H2S

NH3

BF3

In which paper some additive is not added.

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Carbon paper

Filter paper

Glazed paper

Art paper

The rate of a chemical reaction is proportional to the product of the active mean of the reactants, This is a statement of.

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Law of dynamic equilibrium

Le Chatlier's principle

Law of mass action

Solubility product principle

Permanent hard water is softened by addition of.

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Na2CO3

CaCO3

MgCO3

ZnCO3

The hardness of water i s due to the presence of dissolved soluble salts of.

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Calcium

Megnesium

Iron

All above

Various compound corresponding to molecular formula C1H10 are.

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Functional isomers

Position isomers

Chain isomers

None of the abvoe

Cytosine a pyrimidine base pairs with

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Guanine

Thymine

Adenine

Any of these

A well packed column may hve

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100 plates /m

1000 plates /m

10 plates /m

10,000 plates/m

Of all the noble gaes, easily available gases are

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He & Ar

He & Ne

Ne & Ar

Xe & Kr

Sulphate ores of aluminium

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Alumite

Cryolite

Fekdsper

Kaolin

The branch of chemistry which is concerned with the interrelation of electrical and chemical energy is called.

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Reaction dynamics

Electrochemisty

Surface chemistry

Kinetics

Which of the following combination is used to make buffer.

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NaOH and HCl

KOH and H2SO4

CH3COOH and CH3COONa

CH3COOH and NH4OH

The maximum number of electrons in s,p,d and f sub shells are.

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2 in each

2, 6, 10, 18

2,6 ,10,14

5 in each

The element Uuu has atomic numebr

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102

111

101

110

Which of the following elements is most electropositive.

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C

N

O

Be

The molarity of a 500 mL solution containing 4 g NaOH

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0.1

0.2

0.3

0.4

Sugar and common salt in a mixture can be separated through then process of.

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Sublimation

Distillation

Ion exchange

Crystallization from solution in ethanol

Detergents are known to pollute revers and water ways. However, detergents can be made biodegradable and pollution free by taking.

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cyclic hydrocarbon chain

Shorter hydrocarbon chain

Unbranched hydrocarbon chain

Benzenoid hydrocarbons

CFT can very well explain

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Color

Magnetic properties

Spectra of transition metal

All

Oxygen and sulphur exist in state

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Free

Combined

_{Both free & combined}

None of above

Bryllium salts on hydrolysis give.

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Basic solutions

Acidic solutions

Neutral solutions

Amphoteric solutions.

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