Question # 1

Which one of the following salts makes the water permanently hard?

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NaCO₃

NaHCO₃

CA(HCO₃)₂

CaSO₄

Rapid growth of algae in water bodies in because of detergent having.

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Carbonat salt

Sulphonic acid

Sulphat salt

Phosphate salt

Which is simplest alkane?

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CH₄

C₂H₈

C₂H₂

C₂H₄

Mesophere extend forms 50 km to:

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50 km

12 km

60 km

85 km

Which disease cause by deficiency of vitamin D?

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Rickets

Anemia in babies

Scurvy

Night blindness

Formation profess of Ammonia by the combination Hydrogen and Nitrogen was given by:

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Dalton

Thomson

Haber

Waage

We exhale gas in the atmosphere during respiration.

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Carbon dioxide

Oxygen

Nitrogen

Water

Chemical form of gypsum.

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MgSO₄. 5H₂O

CaSO₄. 2H₂O

FeSO₄. 5H₂O

CuSO₄. 5H₂O

Normal rain water is:

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weakly acidic

strongly acidic

weakly basic

strongly basic

The ability of carbon atom to form chain is called.

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Isomerism

Catenation

resonance

Condensation

Red hair contains compound of.

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Iron

copper

titanium

Molybdenum

Which one of the following does not contain proteins.

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In pulses

In Potatoes

In fruits

In eggs

The Earth's atmosphere is getting hotter because of.

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Increasing concentration of CO

Increasing concentration of CO₂

Increasing concentration of O₃

Increasing concentration of SO₂

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