Question # 1

Which of the following gas will turn lime water milky

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Cl₂

NO₂

CO

CO₂

When water is added to plaster of paris, it changes to a hard mass. Its volume also expands upto

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1%

2%

3%

5%

The crystals of caustic soda, NaOH, are hygroscopic when these crystals are exposed to air.

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Gain water and remains solid

Gain water and becomes liquid

Lose mass and remain solid

Remain unchanged on heating.

Which is insoluble in water.

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BeSO4

MgSO4

CaSO4

BaSO4

Which of the following compounds is used to make spray, which has fungicidal action.

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BaSO4

Na2CO3

CaO

CaSO4.2H2O

Chile saltpeter has the chemical formula

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NaNO3

KNO3

Na2B4O7

Na2CO3.H2O

In which ore carbon is present

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Magnesite

Epsom salt

Barite

Sylvite

Which oxide is amphoteric in nature.

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BeO

MgO

CaO

BaO

Which is more basic

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RbOH

NaOH

KOH

Li OH

Which one of the following is not an alkali metal

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Francium

Caesuym

Rubidium

Radium

Dolomite is a carbonate of

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Be

Mg

Na

Ba

The word alkali is derived from which language

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Arabic

Greek

French

German

Which metal oxide is insoluble in water

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MgO

CaO

SrO

BaO

Which one of the following pairs of metal reactive directly with nitrogen

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Na and Mg

Li and Mg

Mg and Ca

Li and Be

Which one does not belong to the alkaline earth metals

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Be

Ba

Ra

Rn

Which element reacts with alkali and H2 gas is produced.

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Be

Mg

Ca

Sr

Which is more basic

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RbOH

NaOH

KOH

Li OH

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