Question # 1

Any substance which has solidified from the liquid state with crystallization is known as

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Steel

Fibre

Glass

Asbestos

H2SO4 acts as gent

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Reducing

Oxidizing

Both A and B

None of above

Which of the following bonds will be non polar.

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N - H

O - H

C - H

C l - Cl

The hydrogen bond is strongest in.

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O - H .............S

S - H.............O

F- H....................F

F - H...............O

In Serpekr's process the ore is treated with which of the following.

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Carbon

Nitrogen gas

Both A and B

None of these

Pick out the incorrect statement about K2Cr2O7

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It is thermally stable

It dissolves in alkali to form chromate

It oxidizes acidified FeSO4 solution to Fe2(SO4)3

It is used as cleansing agent for glassware, etc. when mixed wiht cold conc. H2SO4

Which of the following is soluble in water.

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AgF

AgCl

AgBr

Ag I

Which of the following pentahalides is not formed.

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NF5

PF5

AsF5

BiF5

An sp3 hybrid orbital contains

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1/4 a character

1/2 a character

2/3 a character

3/4 a character

Perdisulphuric acid is.

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Marshal acid

Caro acid

None of above

Any of above

A^o or 10 Dq is called crystal field.

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Energy

Splitting energy

Stabilization energy

None of above

NH3 has a not dipole moment while BF3 has zero dipole moment Thsi is because.

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NH3 is not a planar molecule while BF3 is a planar molecule.

NH3 is a planar molecule, while BF3 is a planner molecule.

Fluorine is more electronetative than nitrogen

Born is more electronegative than nitrogen

Which of the following have +3 oxidation states.

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B & AI

In & TI

B & In

AI & TI

In the fourth flotation process for the purification of ores, the ore particles floats because.

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They are light

Their surface is not easily wetted by water

They bear electrostatic charge

They are insoluble

The pH of the 0.0032 M H2SO4 is.

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3.2

4.0

2.198

1.0

The electron gain enthalpy of chlorine is -349 Kj mol-1 ionization energy of Cl would be.

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-349 kJ mol -1

349 kJ mol-1

-698 kJ mol-1

698 kJ mol-1

Buffer solution are used to.

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Increase the pH

Resist the pH

Decrease the pH

None of above

Among alkali metals, the least metallic element is.

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Li

Na

Rb

Cs

Al2Cl6 is an example of

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Ionic bond

Covalent bond

Co ordinate bond

Metallic bond

Finely divided iorn combines with CO to give

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Fe(CO)3

Fe2 (CO)9

F33(CO)12

Fe(CO)6

The structure of SO2

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Linear

Angular

V-shaped

Planner

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