Question # 1

Which element reacts with alkali and H2 gas is produced.

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Be

Mg

Ca

Sr

Which gas is evolved when CO2 is passed through KO2.

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O2

CO

O3

None of these

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

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Na+

Ca+

Ba+2

Mg+2

The oxide of beryllium is

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Acidic

Basic

Amphoteric

None of these

The most metallic elements from the following is

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Arsenic

Oxygen

Antimony

Bismuth

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

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 is insoluble in water.

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BeSO4

MgSO4

CaSO4

BaSO4

Which of the following sulphates is not soluble in water.

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Sodium sulphate

Potassium sulphate

Zinc sulphate

Barium Sulphate

Which is more basic

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RbOH

NaOH

KOH

Li OH

Point out the element which forms super oxide

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Li

Na

K

C

Chile saltpeter has the chemical formula

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NaNO3

KNO3

Na2B4O7

Na2CO3.H2O

Nelson's cell is used to prepare

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NaOH

Na₂CO₃

Na metal

NaCl

The Milk of magnesia is used for the treatment of

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Basicity

Rancidity

Acidity

Jaundance

Ca Mg3 (SiO3)2 is the composition of.

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Dolomite

Gypsum

Calcite

Asbestos

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 called milk of magnesia.

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MgCO3

Mg(OH)2

MgSO4

MgCl2

When carbon di oxide is bubbled through lime water, white precipitate is formed This precipitate is.

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COCl2

H2CO3

CaO

CaCO3

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