Question # 1

Chlorophyll contains in it:

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Li

Na

Mg

Ca

Alkali metals have electrons in s-orbital:

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one

two

three

Four

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

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

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1%

2%

3%

4%

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

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H₂

Na

Cl₂

O₂

Which oxide is insouluble

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Li₂O

Na₂O

K₂O

BaO

All alkali metals react with acetylene to form acetylides except

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Li

Na

K

Rb

The strong alkaline solution in water is of metal:

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Potassium

Sodium

Lithium

Magnesium

Acidic soils are neutralized by adding:

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Plaster of paris

Brine

Lime

Milk of magnesia

alkaline metal have electrons in s-orbitals:

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One

Two

three

Four

The mineral CaSO₄.2H₂O has the general name

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gypsum

dolomite

calcite

epsom salt

Lime is often used as an agent:

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dehydrating

hydrating

oxidizing

reducing

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 respectgive metal

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Oxides

Nitrates

Sulphates

CO₂

The element caesium bears resemblance with:

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Ca

Cr

Both of the above

None of these

the oxides of beryllium are:

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acidic

basic

amphoteric

None of these

Which is insoluble carbonate?

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KCO₃

CaCO₃

Na₂CO₃

K₂CO₃

Cement plaster is made by mixing plaster of paris with:

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glue or oil

gypsom

glycol

alum or borax

Chile saltpetre has the chemical formule

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NaNO₃

KNO₃

Na₂B₄O₇

Na₂CO₃.H₂O

Cement plaster is made by mixing plaster of paris with

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glue or oil

gypson

glycol

alum or borax

Which one of the following is not an alkali metal?

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Francium

Caesium

Rubidium

Radium

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