Question # 1

Alkali metals have electrons in s-orbital:

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one

two

three

Four

Which one is alkali metal in them?

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Rubidium

Magnesium

Calcium

Barium

I-A group elements are called:

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Alkali-metal

alkaline earth metals

Halogens

Chalocogens

Which of the following sulphates is not soluble in water?

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Sodium sulphate

Potassium sulphate

Zinc sulphate

Barium sulphate

The strong alkaline solution in water is of metal:

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Potassium

Sodium

Lithium

Magnesium

Cement plaster is made by mixing plaster of paris with:

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glue or oil

gypsom

glycol

alum or borax

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

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

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

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Na⁺

Cs⁺

Ba⁺

Mg⁺²

Transition elements belong to

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I-A & II-A

III-A to VIII-A

I-B to X-B

Lanthanides

All alkali metals react with acetylene to form acetylides except:

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Li

Na

K

Rb

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

Maximum shielding effect is observing in

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Li

Be

Mg

Ca

Gypsom added in cement is:

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1%

2%

3%

4%

Milk of lime is

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MgO

CaO

Ca(OH)₂

Mg(OH)₂

Lime is often used as an agent

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dehydrating

hydrating

oxidizing

reducing

alkaline metal have electrons in s-orbitals:

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One

Two

three

Four

Decomposition of carbonate of alkaline earth metals produce gas

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N₂

Oxide

CO₂

CO

Chlorophyll contains in it:

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Li

Na

Mg

Ca

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