Question # 1

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

Milk of lime is

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MgO

CaO

Ca(OH)₂

Mg(OH)₂

The oxides of beryllium are

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acidic

basic

amphoteric

none of these

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

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Na⁺

Cs⁺

Ba⁺

Mg⁺²

Which is plaster of paris?

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CaSO₄.H₂O

(CaSO₄)₂.H₂O

CaSO₄.2H₂O

CaSO₄.3H₂O

Which one is alkaline earth metal?

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Sodium

Beryllium

Potassium

Lithium

Arabic word "alkali" means:

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The ashes

the sour

The fragrant

Caustic

CO₂absorber used in breathing tanks is

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K₂O₂

K₂O

KO₂

Na₂O₂

Cement plaster is made by mixing plaster of paris with:

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glue or oil

gypsom

glycol

alum or borax

Carbonates of alkaline earth metals decomposes to respective metal

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oxides

nitrates

sulphates

CO₂

I-A group elements are called:

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Alkali-metal

alkaline earth metals

Halogens

Chalocogens

Chlorophyll contains in it

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Li

Na

Mg

Ca

Gypsom added in cement is

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1%

2%

3%

4%

All alkali metals react with acetylene to form acetylides except

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Li

Na

K

Rb

Alkali metals have electrons in s-orbital:

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one

two

three

Four

Which is insoluble carbonate?

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KCO₃

CaCO₃

Na₂CO₃

K₂CO₃

Lime is often used as an agent

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dehydrating

hydrating

oxidizing

reducing

Cement plaster is made by mixing plaster of paris with

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glue or oil

gypson

glycol

alum or borax

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

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1%

2%

3%

4%

Lime is often used as an agent:

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dehydrating

hydrating

oxidizing

reducing

Decomposition of carbonate of alkaline earth metals produce gas

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N₂

Oxide

CO₂

CO

All alkali metals react with acetylene to form acetylides except:

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Li

Na

K

Rb

Transition elements belong to

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I-A & II-A

III-A to VIII-A

I-B to X-B

Lanthanides

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 oxides of beryllium are:

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acidic

basic

amphoteric

None of these

Which of the following sulphates is not soluble in water?

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Sodium sulphate

Potassium sulphate

Zinc sulphate

Barium sulphate

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

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Be

Ra

Ba

Rn

The strong alkaline solution in water is of metal:

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Potassium

Sodium

Lithium

Magnesium

Chlorophyll contains in it:

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Li

Na

Mg

Ca

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