Question # 1

Which disease cause when humans use water of industrial effuents.

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Cancer

Asthma

Jaundica

Cholera

when a system is in equilibrium state or in dynamic equilibrium state.

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Reactants and product are equal

Forward reactions stops

Reverse reactions stops

Forward reaction rate and reverse reaction rate

Temporary hardness is because of .

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Ca(HCO₃)₂

CaCO₃

MgCO₃

MgSO₄

The number of carbon atoms present in fuel oil.

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14-18

15-18

16-18

17-18

Which is used to manufacture of soap?

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NaOH

Ca(OH)₂

KOH

Mg(OH)₂

Which is not a reducing sugar?

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Glucose

Fructorse

Cellulose

All of them

Crude oil is heated to the fractionating furnace upto.

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300 ^oC

350^oC

400^oC

450^oC

Ammonia is prepared by:

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Solvay's process

Haber's process

Floatation process

Bayer's process

Metallurgy involves which of the following steps?

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Mining and enrichment

Reduction

Refining and casting.

All of these

The molecular formula of the first three members of the alkane hydrocarbons are CH_4,C₂H₆ and C₃H₈. What is the molecular formula for the eight alkane member, octane, which is found is petrol?

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C₈H₈

C₈H₁₆

C₈H₁₈

C₈H₂₀

Which gas is responsible in warming the atmosphere?

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Nitrogen

Hydrogen

Helium

Fluorine

Glucose and fructose are.

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Pentose

Triose

Hexoses

None of these

The reaction in which the products can recombine to form reactants are called.

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Reversible reaction

Irreversible reaction

Decomposition

Addition

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