Question # 1

Which ion will have the maximum value of heat of hydration.

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Na+

Ca+

Ba+2

Mg+2

Which one does not belong to the alkaline earth metals

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Be

Ba

Ra

Rn

Which substance is used to lower the melting point of NaCl in Down's cell

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CaCO3

CaCl2

MgSO4

AlCl3

Which is insoluble in water.

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BeSO4

MgSO4

CaSO4

BaSO4

Oxides of alkaline earth metal are

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Acidic

Basic

Neutral

Amphoteric

Ca Mg3 (SiO3)2 is the composition of.

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Dolomite

Gypsum

Calcite

Asbestos

Which meal is least reactive

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Li

NaOH

K

Pb

In Down's cell anode is made up of.

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Iron

Copper

Graphite

Platinum

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 one of the following elements has the same oxidation number in all its known compounds.

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Beryllium

Nitrogen

Sulphur

Chorine

Down's cell is used to prepare.

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Sodium carbonate

Sodium bicarbonate

sodium metal

Sodium hydroxide

Which one is not use of lime

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Extraction of metals

Ceramic industry

Preparation of bleaching powder

Preparation of gypsum

Which is called milk of magnesia.

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MgCO3

Mg(OH)2

MgSO4

MgCl2

The ore CaSO4.2H2O has the general name.

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Gypsum

dolomite

Calcite

Epsom salt

Chile saltpeter has the chemical formal

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NaNO₃

KNO₂

Na₂B₄O₇

Na₂CO₃.H₂O

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

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Be

Ra

Ba

Rn

Which element is present in chlorophyll

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Ca

Mg

K

Be

Setting of Plaster of Paris is accompanied with

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Hydrogen bonding

Hydration

Dehydration

None of these

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%

Which is the least reactive of all the alkali metals

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Li

Na

K

Cs

Which one of the following is not an alkali metal.

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Francium

Cesium

Rubidium

Radium

Alkali metal whose carbonate is is relatively less stable and decomposes giving its oxides is.

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Li

Ba

K

Rb

Which is more basic

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RbOH

NaOH

KOH

Li OH

Which metal oxide is insoluble in water

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MgO

CaO

SrO

BaO

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