Question # 1

When system is at quilibrium state.

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The rate of the forward and reverse rections become equal

The concentrationof reatants and product becoes equal

The oposing reactions stop

The rate of the reverse reactio becomes very low

Concentratin of reactants and product at equilibrium remains unchanged if

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Concentration of any reactant or product is not changed

Temperaure of the reation is not changed

Pressure or volume of the system is not changed

All of the above are observed

In the beginning the rate of reverse reaction is.

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Slow

very fast

Moderate

Negligible

Predict which components of the amosphere react in the presence of lightening.

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N2 and H2O

O2 and H2O

N2 and O2

CO2 and O2

The reaction in which the products do not reombine to form reatants are called

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Addition reactions

Decomposition reactions

Irreversitble reactions

reversible reactions

Such reaction which continue in both directins are called.

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Dynamic

Irreversible

Reversible

Non- reactive

Which compound is used a thinner is paint industry?

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H2O

C2H3OH

CH3COOC2H5

CH3COOH

A reverse reaction is one that

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Speeds up gradually

Proceeds from left to right

In which reactants react to form products

Slow down gradually

The forward reaction takes place from

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Right to left

Left to right

Both a and b

None of these

CaO or lime is used extensive in steel, glass and paper industries. It is produced inan exothermic reversitble reaction by the decompositon of lie . Choose the conditions to produce maximum amount of lime.

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Heating at high temperatur ein an open vessel

Heating at high temperatur ein a closed vessel

Cooling it in a closed vessel

Colling it in an open vessel

At what temperature , rate of ammonia formation and decomposition is the highest.

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200 ^oC

300^oC

400 ^oC

500 ^oC

An Inorganic chemistry places one mle of PCl5 in container A and one mole of each Cl2 and PCl3 in container B. Both the containers were sealed and heated to the same temperture to reach the stte of equilibrium Guess about the composition of mixtures in both the containers.

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Both the containers wil have zero concentration of its reactants.

Both the containers wil hae the same composition of mixtures

Container A will have more concentraion of PCl3 than B.

Container A will have less concentraion of PCl3 than B.

Which type of reactions speed up gradully?

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Decomposition reaction

Forward reaction

Reverse reactions

Irreversibel reactions

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