Question # 1

A chemical reaction A ---------- B is said to be in equilibrium when

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Complete conversion of A to B has taken place

Conversion of A to B is 50% complete

Rate of transformation of A to B is equal to B to A

50% Reactant have been changed to B

Acetone and chloroform are soluble in each other due to.

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Intermolecular hydrogen bonding

Dipole dipole interaction

Instantaneous dipoles

All of the above

For a gas obeying Boyle's law if pressure is doubled, the volume becomes.

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Double

One half

Four times

Remains constant

As compared to pure atomic orbitals the hybrid orbitals have.

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Low energy

High energy

Same energy

None of these

Rate of a chemical reaction generally increase rapidly even for small increase in temperature because of rapid increase in the

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Collisions frequency

Activation energy

Average KE of molecules

Fraction of molecules with energies more than activation energy

a zero order reaction is one is which

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Reactants do not react

One reactant is in large excess

Concentration of reactant do not change with passage of time

Rate is of affected by changing concentration of reactants

At equilibrium stage of chemical reaction

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The concentration of reaction is equal to concentration of products

The rate constant of forward reaction is equal to rate constant of backward reaction

The rate of forward reaction is equal rate of backward reaction

The energy of activation of forward step is equal to energy of activation of backward step

In discharge tube, properties of X-rays depend upon the nature of.

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Residual gas

Cathode plate

Anode plate

All of these

How many atoms are present in half mol of oxygen gas. Gas exist in diatomic state.

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3.01 x 10²³

6.02 x 10²³

2 x 10²³

1.003 x 10²³

Which liquid has low boiling point with.

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Less intermolecular force and higher V.P

Greater intermolecular forces and low V.P

Bigger size and greater polarizability

High hydrogen bonding in it

In cubic and hexagonal closest packing which layer has different arrangement.

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First

Second

Third

Fourth

Two solution of NaCI and KCI are prepared separately by dissolving same moles of them in the fixed amount of solvent. Which of the following statements is true for these solution

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KCI solution will have higher boiling point than NaCI solution

Both the solutions have different boiling point

KCI and NaCI solution possess same vapour pressure

KCI solution possesses lower freezing point than NaCI solution

the substance which increase the rate of reaction but remains unchanged at the end of the reaction is called.

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Indicator

Promoter

Catalyst

Activated complex

Which one of the following gases cannot be liquefied by Line's method.

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Water vapours

NH3

Nitrogen

H2

CO+ is an example of.

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Free radical

Cationic molecular ion

Anionic molecular ion

Stable molecule

In which de excitation of electron of hydrogen atom maximum energy is relaeased.

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From n2 to n1

From n3 to n2

From na to n1

From na to n2

Observed pressure is less than ideal pressure for any gas due to

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Intermolecular forces

Size of molecules

Boiling point of molecules

Both a and c

Which gas has highest e/m ratio

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Hydrogen

Helium

Nitrogen

Oxygen

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