Question # 1

Compound of metal exist under earth crust are called.

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Ore

Gangue

Minral

None of these

Formula of Potassium ferrocyanide.

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K₄[Fe(CN)₆]^-4

K₃[Fe(CN)₄]^-3

K₂[Fe(CN)₆]^-4

K₄[Fe(CN)₅]^-4

____________ use for ripening of fruits.

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Ethene

Ethane

Ethyne

Propane

Deficiency of Vitamin E causes.

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rickets

Scurvy

Anemia in babies

Night blindness.

Formula of Decane is.

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C₁₀H₂₀

C₁₀H₂₂

C₁₀ H₄

C₁₀H₁₆

Which one of the following is used as jet fuel.

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Kerosene oil

Lubricating oil

Fuel oil

Diesel oil

Glucose is:

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Hexabydroxy aldehyde

Hexahydroxy ketone

Polyhydroxy aldehyde

Pentahydroxy ketone.

The most important disaccharide is .

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Sucrose

Glucose

Cellulose

None of them

Which disease cause by deficiency of vitamin D?

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Rickets

Anemia in babies

Scurvy

Night blindness

Mesophere extend forms 50 km to:

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50 km

12 km

60 km

85 km

Incomplete combustion of alkanes produce.

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Carbon dixoide only

Carbon monoxide only

Carbon monoxide carbon black and water

Carbon dioxide and carbon black

According to Bronsted and Lowry concept an acid is a substance that can donate.

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Proton

Electron pair

Neutron

Electron

When acid react with carbonates and bicarbonates which gas is evolved?

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H2

CO₂

Cl₂

N₂

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