Question # 1

The halide which is not hydrolysed is

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SiCl₄

SiF₄

CCl₄

PbCl₄

Sulphonation of benzoic acid produces mainly

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o-Sulphobenzoic acid

m-Sulphobenzoic acid

p-Sulphobenzoic acid

o- and p-Sulphobenzoic acid

The percentage of oxygen in NaOH is

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40

60

8

10

The maximum number of electrons in a subshell for whichι = 3 is

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14

10

8

4

Which of the following belongs to the halogen family?

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Francium

Polonium

Radium

Astatine

The rate of reaction between A and B increases by a factor of 100, and when the concentration with respect to A is increased 10 folds, the order of reaction w.r.t. A is

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10

1

4

2

The dimension of rate constant of second order reaction involves

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Neither time nor concentration

Only time

Time and concentration

Time and square of concentration

The relative rates of diffusion of a gas (molecular weight = 128) as compared to oxygen is

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2 times

1/4

1/8

1/2

According to MO theory, the species O⁺₂

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Bond order of 2.5

Three unpaired electrons

Diamagnetic character

Stability lower then O₂

Which of these is the most widely used nitrogen fertilizer in Pakistan

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Urea

Ammonium nitrate

Ammonium Sulphate

Ammonium chloride

Which of the following has no tin in its composition?

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Solder

Bronze

Brass

Tin stone

In Friedal-Craft's alkylation besides AlCl₃the other reactants are

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C6H6 + NH3

C6H6 + CH4

C6H6 + CH3Cl

C6H6 + CH3COCl

Bromine is obtained on a commercial scale from

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Caliche

Carnallite

Common satl

Cryolite

The last orbit of argon would have electrons

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8

18

2

6

Fertililzer are made by

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Nature only

Artificial methods only

Both artificial and natural methods

None of the above

Inert pair effect plays an important role in case of

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F

Al

Si

Tl

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