Question # 1

Gypsom added in cement is:

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1%

2%

3%

4%

Which of the following sulphates is not soluble in water?

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Sodium sulphate

Potassium sulphate

Zinc sulphate

Barium sulphate

Milk of lime is

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MgO

CaO

Ca(OH)₂

Mg(OH)₂

Gypsom added in cement is

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1%

2%

3%

4%

CO₂absorber used in breathing tanks is

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K₂O₂

K₂O

KO₂

Na₂O₂

Which are being formed by alkali metals?

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oxides

nitrides

carbides

peroxides

Which oxide is insouluble

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Li₂O

Na₂O

K₂O

BaO

alkaline metal have electrons in s-orbitals:

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One

Two

three

Four

II-A group element are called:

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s-block elements

p-block elements

d-block elements

f-block elements

s-block elements belong to groups

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I-A & II-A

III-A to VIII-A

I-B to X-B

Lanthanides

Chile saltpetre has the chemical formule

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NaNO₃

KNO₃

Na₂B₄O₇

Na₂CO₃.H₂O

Diaphragm cell is used to prepare

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sodium

sodium hydroxide

calcium

magnesium

The mineral CaSO₄.2H₂O has the general name

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gypsum

dolomite

calcite

epsom salt

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

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Na⁺

Cs⁺

Ba⁺

Mg⁺²

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

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Be

Ra

Ba

Rn

p-block elements belong to group

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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 respectgive metal

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Oxides

Nitrates

Sulphates

CO₂

Chlorophyll contains in it:

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Li

Na

Mg

Ca

Chlorophyll contains in it

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Li

Na

Mg

Ca

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

gypson

glycol

alum or borax

Carbonates of alkaline earth metals decomposes to respective metal

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oxides

nitrates

sulphates

CO₂

Maximum shielding effect is observing in

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Li

Be

Mg

Ca

The strong alkaline solution in water is of metal:

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Potassium

Sodium

Lithium

Magnesium

Down's cell is used to prepare:

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Sodium carbonate

Sodium bicarbonate

Sodium metal

Sodium hydroxide

Transition elements belong to

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I-A & II-A

III-A to VIII-A

I-B to X-B

Lanthanides

Alkali metals have electrons in s-orbital:

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one

two

three

Four

All alkali metals react with acetylene to form acetylides except:

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Li

Na

K

Rb

Which one is alkali metal in them?

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Rubidium

Magnesium

Calcium

Barium

Which is plaster of paris?

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CaSO₄.H₂O

(CaSO₄)₂.H₂O

CaSO₄.2H₂O

CaSO₄.3H₂O

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