Question # 1

Which of the following sulphates is not soluble in water?

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Sodium sulphate

Potassium sulphate

Zinc sulphate

Barium sulphate

Lime is often used as an agent:

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dehydrating

hydrating

oxidizing

reducing

Group VII-A elements are called:

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s-block elements

p-block elements

d-block elements

f-block elements

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%

Carbonates of alkaline earth metals decomposes to respectgive metal

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Oxides

Nitrates

Sulphates

CO₂

All alkali metals react with acetylene to form acetylides except

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Li

Na

K

Rb

Lime is often used as an agent

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dehydrating

hydrating

oxidizing

reducing

Down's cell is used to prepare:

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Sodium carbonate

Sodium bicarbonate

Sodium metal

Sodium hydroxide

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

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1%

2%

3%

4%

CO₂absorber used in breathing tanks is

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K₂O₂

K₂O

KO₂

Na₂O₂

All alkali metals react with acetylene to form acetylides except:

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Li

Na

K

Rb

Acidic soils are neutralized by adding:

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Plaster of paris

Brine

Lime

Milk of magnesia

Arabic word "alkali" means:

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The ashes

the sour

The fragrant

Caustic

Milk of lime is

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MgO

CaO

Ca(OH)₂

Mg(OH)₂

Transition elements belong to

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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

Gypsom added in cement is

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1%

2%

3%

4%

Which oxide is insouluble

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Li₂O

Na₂O

K₂O

BaO

The oxides of beryllium are

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acidic

basic

amphoteric

none of these

acidic soils are neutralized by adding

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plaster of paris

brine

lime

milk of magnesia

Cement plaster is made by mixing plaster of paris with

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glue or oil

gypson

glycol

alum or borax

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