Question # 1

The word alkali is derived from which language

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Arabic

Greek

French

German

Point out the element which forms super oxide

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Li

Na

K

C

Which element reacts with alkali and H2 gas is produced.

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Be

Mg

Ca

Sr

Down's cell is used to prepare.

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Sodium carbonate

Sodium bicarbonate

sodium metal

Sodium hydroxide

------------- 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

Which on eof the following alkaline earth metal form peroxide when heated with oxygen at 600 ^oC

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Magnesium

Calcium

Strontium

Barium

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 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 is insoluble in water.

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BeSO4

MgSO4

CaSO4

BaSO4

Dolomite is a carbonate of

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Be

Mg

Na

Ba

Which one of the following has lowest first ionization energy.

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Li

Na

Rb

Cs

The element cesium bears resemblance with

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Ca

Cr

Both of the above

None of the above

Which of the following sulphates is not soluble in water.

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Sodium sulphate

Potassium sulphate

Zinc sulphate

Barium Sulphate

Sulphur is essential constituent for plants. Which is not role of sulphur

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Chlorophyll development

Development of root system

Constituents of some proteins

Increase transpiration force

Which of the following gas will turn lime water milky

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Cl₂

NO₂

CO

CO₂

Ca Mg3 (SiO3)2 is the composition of.

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Dolomite

Gypsum

Calcite

Asbestos

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