Question # 1

I-A group elements are called:

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Alkali-metal

alkaline earth metals

Halogens

Chalocogens

Which oxide is insouluble

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Li₂O

Na₂O

K₂O

BaO

Plaster of paris is mixed with water, the expansion in volume is:

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1%

2%

3%

4%

Decomposition of carbonate of alkaline earth metals produce gas

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N₂

Oxide

CO₂

CO

d-block elements belong to groups

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I-A & II-A

III-A to VIII-A

I-B to X-B

Lanthanides

Carbonates of alkaline earth metals decomposes to respective metal

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oxides

nitrates

sulphates

CO₂

CO₂absorber used in breathing tanks is

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K₂O₂

K₂O

KO₂

Na₂O₂

Acidic soils are neutralized by adding:

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Plaster of paris

Brine

Lime

Milk of magnesia

Maximum shielding effect is observing in

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Li

Be

Mg

Ca

Which one is alkaline earth metal?

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Sodium

Beryllium

Potassium

Lithium

Chlorophyll contains in it:

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Li

Na

Mg

Ca

Down's cell is used to prepare:

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Sodium carbonate

Sodium bicarbonate

Sodium metal

Sodium hydroxide

Carbonates of alkaline earth metals decomposes to respectgive metal

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Oxides

Nitrates

Sulphates

CO₂

Diaphragm cell is used to prepare

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sodium

sodium hydroxide

calcium

magnesium

Which one o the following does not belong to alkaline earth metals?

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Be

Re

Ba

Rn

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

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Na⁺

Cs⁺

Ba⁺

Mg⁺²

Which element is deposited at the cathode during the electrolysis of brine in Nelson's cell?

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H₂

Na

Cl₂

O₂

The element caesium bears resemblance with:

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Ca

Cr

Both of the above

None of these

Gypsom added in cement is:

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1%

2%

3%

4%

Which is plaster of paris?

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CaSO₄.H₂O

(CaSO₄)₂.H₂O

CaSO₄.2H₂O

CaSO₄.3H₂O

Arabic word "alkali" means:

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The ashes

the sour

The fragrant

Caustic

Cement plaster is made by mixing plaster of paris with:

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glue or oil

gypsom

glycol

alum or borax

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