Question # 1

Aluminum is usually extracted from

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Bauxite

Corundum

Feldepar

Alumite

Acid rain effects

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Human being

Crops

Aquatic life

All above

According to SHAB, Lewis acid are divided into.

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Two classes

Three classes

Four classes

None of above

According to the VSEPR theory, the shape of the SO3 molecule is.

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Pyramidal

Tetrahedral

Trigonal planar

Distorted totrahedron

CFT can very well explain

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Color

Magnetic properties

Spectra of transition metal

All

White Phosphorus is kept under

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Cold water

Ammonia liquor

Ethanol

Kerosene

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 carbonates decomposes at the highest temperature.

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Mg CO3

CaCO3

Sr CO3

Ba CO3

Pick out the incorrect statement for Xe F6

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XeF6 is hydrolyzed practically to form XeOF4

It reacts with SiO2 to form Xe F4

On complete hydrolysis, it forms XeO3

It acts as F acceptor when treated with alkali metal fluoride, but cannot act as F donor to form complexes.

Stainless steel contains.

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Fe + Cr+ Ni

Fe + Ni + Cu

Fe + Cr+ Cu

Cu + C + Ni

Pi bond is formed

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By the overlapping of atomic orbitals on internuclear axis

By transference of electrons

By sidewise overlapping to half filled p orbitals

By overlapping of s-orbitals with p orbitals

Stainless steel contains

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Fe+Cr+Ni

Fe+Ni+Cu

Fe + Cr+ Cu

Cu + C + Ni

Sulphate ores of aluminium

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Alumite

Cryolite

Fekdsper

Kaolin

Which of the following orbitals has maximum penetration effect.

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s

p

d

f

The electronegativity of the following elements increases in the order.

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C,N, Si, P

N, Si, C,P

Si, P, C, N

P, Si, N, C

In the forth floatation process for the purification of ores, the ore particles float because.

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They are light

Their surface is not easily vetted by water

They bear electrostatic charge

They are insoluble

The shape of SO₄^2-ion is.

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Tetrahedral

Trigonal planar

Square planar

Octahedral

The formula of sulphur sequioxide

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SO4

S2O7

S2O3

SO3

Most electronegative element is.

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C

Si

Pb

Sn

Which of the following compounds is must acdic.

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H2O

H2S

H2Se

H2Te

Arrange the following in order of increasing boiling point.

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CH3OH < CH3Cl < RbCl < CH4

CHOH < CH4 < CH3Cl < RbCl

RbCl < CH3Cl < CH3OH < CH4

CH4 < CH3Cl < CH3OH < RbCl

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