Question # 1

Alkaline earth metals are usually

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Reducing agent

Oxidizing agent

Amphoteric

Acidic

HNO₂acts as an/a

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Acid

Oxidizing agent

Reducing agent

All the three

Sometimes a yellow turbidity appears while passing H₂S gas even in the absence of II group radicals. This is because

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Sulphur is present in the mixture as impurity

IV group radicals are precipitated as sulphides

Of the oxidation of H₂S gas by some acid radicals

III group radicals are precipitated as hydroxides

Which property is not present in Al?

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Reacts with acid

Reacts with bases

Changes litmus paper

Changes methyle orange colour

Which metal is used in the thermit process because of its activity?

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Iron

Copper

Alumnium

Zinc

LiOH ______ soluble than NaOH

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More soluble

Less soluble

Equally soluble

None

Sodium hexametaphophate is known as

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Calgon

Permutite

Natalite

Nitrolim

Which of the following is acidic?

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SO₃

N₂O

BeO

HgO

The electrolytic cell used for the production of metallic sodium is known as

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Down's cell

Solvary's cell

Haber's cell

None of these

Which one of the following pentafluorides cannot be formed?

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PF₅

AsF₅

SbF₅

BiF₅

The metal with highest electrical resistance at room temperature is

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Pb

Te

Po

Fe

______ is called milk of magnesia

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NaOH

KOH

LiOH

None

NaHCO₃is prepared by

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Down's process

Solvay's process

Nelson's process

None of these

The element which has a simple cubic lattice in solid state is

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Se

Te

Po

None of these

Polyanion formation is maximum in

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Nitrogen

Oxygen

Sulphur

Boron

Which element forms an iron with charge 3+?

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Berylium

Aluminium

Carbon

Silicon

Which metal of Group-II A of the periodic Table, will form the least ionic chloride

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Be

Mg

Ca

Sr

White phosphorus is

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A mono atomic gas

P₄, a tetrahedral solid

P₈, a crown

A linear diatomic molecule

Sodium should be stored in

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Air free from moisture

Air free form carbon dioxide

Under water

Under kerosene oil

Which has soapy touch?

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Na2B4O7

H3BO3

Ca2B6O11

HBO2

Gypsum is applied to the soil to provide calcium and

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Oxygen

Nitrogen

Phosphorous

Sulphur

Chemical composition of colemnite is:

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Ca₂B₆O₁₁.5H₂O

CaB₄O₇ .4 H₂O

Na₂B₇O₇. 4 H₂O

CaNaB₅O₉.8H₂O

Permonosulphuric acid is known as

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Marshall's acid

Carlo's acid

Sulphuric acid

None of these

The alkali metals form

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Ionic bond

Covalent bond

Co-ordinate bond

H-bond

The number of unpaired electrons in the p-subshell of oxygen atom

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1

2

3

4

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

Chile saltpetre has the chemical formula

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NaNO₃

KNO₃

Na₂B₄O₇

Na₂CO₃H₂O

Orthophosphoric acid is

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Monobasic

Dibasic

Tribasic

Tetrabasic

______ reacts with alkalis to give hydrogen

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Be

Mg

Ca

None

When sulphur is boiled with Na₂SO₃solution, the compound formed is

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Sodium sulphides

Sodiums sulphates

Sodium persulphate

Sodium thiosulphate

Which of the following are electropositive in nature

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Alkali metals

Alkaline earth metals

Halogens

Alkali and alkaline earth metals

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