Question # 1

Nelson's cell is used to prepare

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NaOH

Na₂CO₃

Na metal

NaCl

Which element reacts with carbon to form metal carbide.

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Li

Na

K

All 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

In which ore carbon is present

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Magnesite

Epsom salt

Barite

Sylvite

Ca Mg3 (SiO3)2 is the composition of.

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Dolomite

Gypsum

Calcite

Asbestos

Which metal oxide is insoluble in water

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MgO

CaO

SrO

BaO

Which of the following gas will turn lime water milky

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Cl₂

NO₂

CO

CO₂

------------- does not belong to Alkaline-Earth metals

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Be

Ra

Ba

Rn

The oxides of beryllium are

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Basicity

Rancidity

Amphoteric

none of all

Which is more basic

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RbOH

NaOH

KOH

Li OH

Setting of Plaster of Paris is accompanied with

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Hydrogen bonding

Hydration

Dehydration

None of these

Which is the least reactive of all the alkali metals

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Li

Na

K

Cs

Which gas is evolved when CO2 is passed through KO2.

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O2

CO

O3

None of these

In Down's cell anode is made up of.

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Iron

Copper

Graphite

Platinum

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

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H₂

Ba

Ra

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 one of the following is not an alkali metal

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Francium

Caesuym

Rubidium

Radium

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.

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