Question # 1

Which is called milk of magnesia.

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MgCO3

Mg(OH)2

MgSO4

MgCl2

Down's cell is used to prepare.

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Sodium carbonate

Sodium bicarbonate

sodium metal

Sodium hydroxide

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 metal oxide is insoluble in water

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MgO

CaO

SrO

BaO

Sodium is collected over molten sodium chloride in Down's cell, because.

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It does not react with NaCl

It is lighter in weight and floats on molten NaCl

Its reactivity is greater than NaCl

None of these

Which is the least reactive of all the alkali metals

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Li

Na

K

Cs

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 hydroxide decomposes on heating.

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LiOH

NaOH

KOH

CaOH

Which one of the following does not belong to alkaline earth metals.

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Be

Ra

Ba

Rn

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

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BaSO4

Na2CO3

CaO

CaSO4.2H2O

Which elements are deposited at the cathode during the electrolysis of brine in diaphragm cell

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H₂

Ba

Ra

Rn

Which is insoluble in water.

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BeSO4

MgSO4

CaSO4

BaSO4

The oxides of beryllium are

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Basicity

Rancidity

Amphoteric

none of all

Point out the element which forms super oxide

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Li

Na

K

C

Which element reacts with carbon to form metal carbide.

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Li

Na

K

All of these

The mineral CaSO₄.2H₂O has the general name

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Dolomite

Gypsum

Calcite

Epsom Salt

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