Question # 1

Carbon atom in methane in hybridized.

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sp3

Sp2

Sp

dsp3

With increases of 10 oC temperature the rate of reaction doubles. This increase in rate of reactions is due to.

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Decrease in activation energy of reaction

Decrease in the number of collisions between reactant molecules

Increase in activation energy of reactants

Increase in number of effective collisions

Rutherford's model of atom failed because.

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The atom did not have a nucleus and electron

It did not account for the attraction between protons and neutrons.

It did not account for stability of the atom

There is actually no space between the nucleus and the electrons.

Which has greater reduction potential

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Na

H2

Zn

F2

A substance which rerareds the rate of a reaction is called

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Inhibitor

Activator

Auto-catalyst

None of these

Water and Phenol are partially miscible to each other at room temperature when both liquids are mixed together which is upper layer.

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Water in Phenol

Phenol and water

Pure phenol

Pure water

Oxidation number of phosphorus in the compound is.

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+3

+4

+5

+6

The pH of 10^-3mol dm^-3of an aqueous solution of H₂SO₄is

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3.0

2.7

2.0

1.5

Existence of an element in more than one crystalline form is known as.

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Anisotropy

Allotropy

Isomorphism

Unit cell

Compound which undergo sublimation is

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KMnO4

CaCO3

NH4Cl

Na2CO3

The sum of mole percent of all the components of solution is always equal to.

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Unity

100

Less than one

Less than 100

The cathodic reaction in the electrolysis of dill. H₂SO₄with Pt electrodes is

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Reduction

Oxidation

Both oxidation and reduction

Neither oxidation nor reduction

the volume occupied by 1.4 of N2 at S.T.P is

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2.24 dm3

22.4 dm3

1.12 dm3

112 cm3

Forces of attraction between He atoms are.

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Hydrogen bonding

London forces

Debye forces

Ion dipole forces

The diffusion of gases at absolute zero will be

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Unchanged

Zero

slightly decreases

Slightly increases

The pK_avalue of CH₃COOH is 4.74 when we mix CH₃COOH and CH₃COONa in the ratio of 10:1, tehn the pH of the buffer is

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4.74

5.74

3.74

7.00

The unit of the rate constant is same as that of the rate of reaction in

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First order reaction

Second order reaction

Zero order reaction

Third order reaction

Which statements not correct about Galvanic cell.

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Anode in negatively charge

Reduction occur at anode

Cathode is positively charged

Reduction occur at cathode

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