Question # 1

Which one is alkaline earth metal?

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Sodium

Beryllium

Potassium

Lithium

CO₂absorber used in breathing tanks is

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K₂O₂

K₂O

KO₂

Na₂O₂

Down's cell is used to prepare:

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Sodium carbonate

Sodium bicarbonate

Sodium metal

Sodium hydroxide

Diaphragm cell is used to prepare

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sodium

sodium hydroxide

calcium

magnesium

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 respectgive metal

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Oxides

Nitrates

Sulphates

CO₂

Carbonates of alkaline earth metals decomposes to respective metal

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oxides

nitrates

sulphates

CO₂

Which are being formed by alkali metals?

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oxides

nitrides

carbides

peroxides

Arabic word "alkali" means:

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The ashes

the sour

The fragrant

Caustic

All alkali metals react with acetylene to form acetylides except:

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Li

Na

K

Rb

Which are being formed by alakli metals?

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oxides

nitrides

carbides

peroxides

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

Maximum shielding effect is observing in

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Li

Be

Mg

Ca

Which one of the following is not an alkali metal?

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Francium

Caesium

Rubidium

Radium

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

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

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Na⁺

Cs⁺

Ba⁺

Mg⁺²

Chlorophyll contains in it

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Li

Na

Mg

Ca

Which oxide is insouluble

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Li₂O

Na₂O

K₂O

BaO

Which one is alkali metal in them?

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Rubidium

Magnesium

Calcium

Barium

Gypsom added in cement is

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1%

2%

3%

4%

The oxides of beryllium are

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acidic

basic

amphoteric

none of these

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

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Be

Re

Ba

Rn

The element caesium bears resemblance with:

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Ca

Cr

Both of the above

None of these

alkaline metal have electrons in s-orbitals:

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One

Two

three

Four

Acidic soils are neutralized by adding:

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Plaster of paris

Brine

Lime

Milk of magnesia

acidic soils are neutralized by adding

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plaster of paris

brine

lime

milk of magnesia

Lime is often used as an agent:

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dehydrating

hydrating

oxidizing

reducing

Chile saltpetre has the chemical formule

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NaNO₃

KNO₃

Na₂B₄O₇

Na₂CO₃.H₂O

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

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Be

Ra

Ba

Rn

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