Question # 1

Anode rays were discovered by

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J. Stoney

Rutherford

J.J. Thomson

Goldstein

How should the condition be changed to prevent the volume of a given gas from expanding when its mass is increased

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Temperature is lowered and pressure is increased

Temperature is increase and pressure is lowered

Temperature and pressure both are lowered

Temperature and pressure both are increased

One molecule of hemoglobin in heavier than one atom of hydrogen.

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680 times

6800 times

68000 times

680000 times

Which of the following species has unpaired electrons in anti-bonding molecular orbitals

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O₂⁺²

N₂^-2

B₂

F₂

The optimum temperature for the synthesis of NH3 by Haber's process is.

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200 ^oC

300 ^oC

400 ^oC

500 ^oC

the nature of the positive rays depend on

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The nature of the electrrode

The nature of the discharge tube

The nature of the residual gas

All of the above

The comparative rates at which the solutes move in paper chromatography, depends on

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The size of paper used

Their R_fvalues

Their partition coefficients

The polarity of solvent used

Which particle have greater wave nature.

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Electron

Proton

Neutron

a particles

Solvent extraction method is a particularly useful technique for separation when the product to be separated is.

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Non volatile or thermally unstable

Volatile or thermally stable

Non volatile or thermally stable

Volatile or thermally unstable

If reactants have very low activation energy it means that reaction is.

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Slow

Fast

Endothermic

Exothermic

K_aand K_bof a conjugate acid and are related with k_was

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K_a+ K_b=K_w

K_a-K_b=K_w

K_a.K_b= K_w

K_a/ K_b= K_w

Which is not chargeable cell

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Lead accumulator

NiCAD cell

Fuel cell

Alkaline battery

In the ground state of an atom the electron is present.

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In the nuclsus

In the second shell

Nearest to the nucleus

Farthest from the nucleus

With increase in 10°C temperature, the rate of reaction double. This increase in rate of reaction is due to

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Decrease in activation energy of reaction

Decrease in the number of collisions between reactant molecules

Increases in activation energy of reactants

Increase in number of effect collisions

Which one is not example of a sublimate.

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NH4Cl

I

NaCl

Benzoic Acid

Which one of the following has the same number of electrons as an alpha particle.

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H

He

H+

Li+

The molal boiling point constant is the the ratio of the elevation in boiling point to.

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Molarity

Molality

Mole fraction of solvent

Mole fraction of solute

The rate of reaction

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Increases as the reaction proceeds

Decreases as the reaction proceeds

Remains the same as the reaction proceeds

May decrease or increase as the reaction proceeds

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