Question # 1

The bond angle H - O - H in ice is closest to

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120° , 28°

60°

90°

109°

Bleaching action of bleaching powder is due to the liberation of

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O₂

OCI^-

CI₂

CI^-

Bragg's law is given by equation

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n λ = 2 θ sin θ

n λ = 2 d sin θ

2nλ = d sin θ

nλ = 1/2 d sin θ

In Friedal-Craft's alkylation besides AICI3 the other reactants are

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C6H6 + NH3

C6H6 + CH4

C6H6 + CH3CI

C6H6 + CH3COCI

Which one of the following elements occurs free in nature?

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N

P

As

Sb

Benzene is obtained by fractional distillation of

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Heavy oil

Anthracene oil

Middle oil

Light oil

Calcium acetate when dry distilled gives

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Formaldehyde

Acetaldehyde

Acetone

Acetic anhydride

The formula of calcium cyanamide is

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Ca(CN)₂

CaC₂N

CaNCN

CaCHNH₂

At 500 K the equilibrium constant for reaction cis-C₂H₂CI₂ trans-C₂H₂CI₂ is 0.6. At the same temperature the equilibrium constant for the reaction trans-C₂H₂CI₂ cis-C₂H₂CI₂ will be

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0.60

1.67

0.66

2.6

Which of the following does not reflect the periodicity of elements?

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Bonding behaviour

Electronegativity

Ionisation potential

Neutron/proton ratio.

By using the fluted filter paper rate of filtration is

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Increased

Decreased

Filtration is constant

Having no effect

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