Question # 1

Which element has highest oxidation potential

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Li

Be

Ba

Ra

Alkaline earth metals posses two electrons in their outermost

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F-orbital

D-orbital

S-orbital

P-orbital

The acid which has a peroxy linkage is

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Sulphurous acid

Pyrosulphuric acid

Dithionic acid

Caro's acid

Which of the following has highest dipole moment?

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NH₃

PH₃

AsH₃

SbH₃

Which one of the following is not an alkali metal

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Francium

Caesium

Rubidium

Radium

Sulphuric acid reacts with PCl₅to give

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Thionyl chloride

Sulphur monochloride

Sulphuryl chloride

Sulphur tetrachloride

Dipole moment of CO molecule is:

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0.0

1.112 D

0.112 D

2.112 D

Which of the following elements is not present abundantly in earth's crust?

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Silicon

Aluminium

Sodium

Oxygen

The formula of lime stone is

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CaCl₂

MgCO₃

Na₂CO₃

CaCO₃

Carbonates of alkali metals dissolves freely in water to form

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Acidic solutions

Neutral solution

Alkaline solution

None of these

Red P can be obtained form white P by

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Heating it with a catalyst in an inert atmosphere

Distilling it in an inert atmosphere

Dissolving it in CS₂and crysllizing

Melting it ad pouring the liquid into water

In a group IIA from top to bottom as the atomic number increases, there is regular decreases in

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Ionic size

Atomic size

Ionization potential

None of these

Solvay process is used in the manufacture of

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Na₂CO₃

NaHCO₃

CaCl₂

All

Baking powder has which one of the following formula

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Na₂CO₃

Na₂SO₄

NaHCO₃

K₂CO₃

Sulphuric acid has great affinity for water because

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It hydrolyses the acid

It decomposes the acid

Acid forms hydrates with water

Acid decomposes water

Permonosulphuric acid is known as

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Marshall's acid

Carlo's acid

Sulphuric acid

None of these

Which of the following is not the reactions of lithium

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Which element forms an iron with charge 3+?

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Berylium

Aluminium

Carbon

Silicon

Which has soapy touch?

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Na2B4O7

H3BO3

Ca2B6O11

HBO2

What causes nitrogen to be chemically inert?

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Multiple bond formation in the molecule

Absence of bond distance

Short internuclear distance

High bond energy

Which of the element is not an alkaline earth metal

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Beryllium

Strontium

Barium

Caesium

The chemical formula of Trona is

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KCl . MgCl₂. 6H₂O

Na₂CO₃. 2NaHCO₃. 2H₂O

Na₂CO₃. H₂O

KCl

HNO₂acts as an/a

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Acid

Oxidizing agent

Reducing agent

All the three

Electron affinity of sulphur is

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More than O and Se

More than O but less than Se

Less than O but more than Se

Equal to O and Se

Hypo is used in photography for

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Developing picture

Picture printed

The colour of picture

The fixation of picture

Chief ore of aluminium is:

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Na₃AIF₆

Al₂O₃.2H₂O

Al₂O₃

Al₂O₃ .H₂O

Which one of the following pentafluorides cannot be formed?

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PF₅

AsF₅

SbF₅

BiF₅

When ammonia is heated with cupric oxide, a molecule of ammonia will

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Gain 3 electrons

Lose 3 electrons

Gain 2 electrons

Lose 2 electrons

Orthophosphoric acid is

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Monobasic

Dibasic

Tribasic

Tetrabasic

Which salt is used for preserving food

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BaCl₂

CaCl₂

NaCl

Na₂SO₄

Which is used in navigational equipments?

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B

Be

Mg

Al

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