Question # 1

The number of degrees of freedom and number of components for a system of containing undissolved salt , in equilibrium with water vapor are.

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2,2

3 , 2

1 , 1

1 , 2

The bromine produced on commercial scale may contain impurities of.

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Water

Chloride

iodine

All above

What is the ratio of stress to strain in a material loaded within its elastic ranger.

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Poisson’s ratio

Refractive index

Modulus of elasticity

None of above

The colour of Ni2+ ion is.

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Blue

Green

deep green

Orange

What is the advantage of quench hardening?

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Imporoved strength

Hardness

Wear characteristics

All of the choice

Which of the following bonds will be non polar.

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N - H

O - H

C - H

C l - Cl

The structure of SO2 is

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Linear

Angular

V-shaped

Planner

In confining and growing nano roade CNTs will act as.

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Template

Support

Source of oxidant

Sieve

Each of the following compound is an aromatic except.

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Benzene

Naphthalene

Cyclopentadienyl cation

Cyclopentadienyl anion

Galvanized steel are steel products coated with

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Carbon

Sulphur

Zinc

Iron

The law of triads is applicable to

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Lithium, beryllium, boron

Fluorine, chlorine, bromine

Chlorine, bromine, iodine

Sodium, potassium, Rubidium

Which of the following statement is incorrect about rock salt type

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It has for arrangement of Na+

Na+ and Cl- ions have coordination number of 6:6

A unit cell of NaCl metals have rock salt type structure.

None of them

Inert pair effect is best shown by

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Si

Z

Sn

Pb

The decomposition of dimethyl ether at 504 oC is first order with a half -life of 1570 second. What fraction of an initial amount of dimethyl ether remain after 47-10 seconds.

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1/3

1/6

1/8

1/16

Fats and oil are_____________

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Acids

Alcohols

Salts

Base

Vitamin which contains cobalt is.

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Vitamin B1

Vitamin B2

Vitamin B6

Vitamin B12

Which of the following solution has highest normality.

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1 N H2PO4

0.5 N H2SO4

6 g NaOH per 100 cm3

4 g NaOH PER 1000 cm3

Each of the following compound react with Grignard's reagent to form alkane exxcept.

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Ethanal

Ethanoic acid

Ethanol

Ethync

Which of the following equations represent linear free energy relationship.

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Hammett equation

Taft equation

Helmholtz equation

Differential equation

All halogens exist as covalent molecules.

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Monoatomic

Daitomic

Triatonic

Tetra atomic

Which of the following statement about molecularity is not correct.

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It cannot be fraction

It can be obtained from balanced equation

It may be or may not be equal to the order of the reaction

it can not be more than 3

In a one -component system the maximum number of phase that can consist in equilibrium is.

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1

2

3

4

Which of the following techniques involve gas as the mobile phase.

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HPLC

GLC

TLC

Paper chromatography

The main constituent of glass is.

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Silica

Silicon

Magnesia

Alumina

When a concentrated solute of an electrolyte is diluted.

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Its specific conductance increases

Its equivalent conductance decreases

The specific conductance decreases and equivalent conductance increases

Both specific and equivalent conductance increase

Pick out incorrect statement about K2Cr2O7

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It oxidizes acidified solution H2SO4 to S

It oxidizes KI to I2

It oxidizes HCl to Cl2

It gives oxygen, when treated with cold conc. H2SO4

When two atoms of hydrogen combine to form a molecule of hydrogen gas the energy of the molecule.

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higher than that of the separate atoms

Equal to that of the separate atoms

Lower than that of the separate atoms

Sometimes lower and sometime higher.

Which of the following techniques is capable of seperating minute quantities of the substances in a relatively short times with high resolutions.

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Gel electrophoresis

Capillary electrophoresis

GC

HPLC

Which of the following statements is not correct about noble gases.

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Their ionization energies are very high

Their electron affinities are nearly zero

They do not form any chemical compounds

They are not easily liquefied

Variable electrovalency is due to the following reasons.

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Unstable configuration of core

Inset electron pair effect

All of above

None of above

Which of the following techniques is used to separate a mixture of cations.

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GC

FPLC

Ion exchange chromatography

Size exchange chromatography

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