Question # 1

Choose the crop for which ammonium nitrate is not used:

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paddy rise

cotton

wheat

sugar cane

Which method is not used in preparation of acetic acid?

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Oxidation of ethane

Hydrolysis of ethyl acetate

Reaction of CO₂with CH₃MgX

Oxidation of methane

Point out that which is not an application of liquid crystals?

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Source of energy

In display of electrical devices

For skin thermography

As temperature sensor

General gas equation is combination of

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Boyle s law

Avogadro s law

Charles s law

All of these

An instrument which is used to measure the pressure of a gas is called:

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barometer

photometer

stalagmometer

viscometer

Polycyclic aromatic hydrocarbons are taught to be

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Disinfectant

Carcinogenic

Helpful

Reactive

Chemicals used to kill fungi are:

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Herbicides

Insecticides

Pesticides

fungicides

Out of total amount of water available for human use is

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0.30%

0.2%

40%

50%

Which statement is incorrect

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pH and [OH-] are inversely related to cach other

pOH and [OH-] are inversely related to each other

pH and [OH-] are directly related to each other

pOH means potential of hydroxyl ion concentration

An acid that exists as a cyclic dimer in benzene and shows a molar mass of 120g/mol is

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СН3СOOH

HCOOH

CI2CHCOOH

Сl3CCOOH

In van der Waal's equation of state of the gas law,the constant 'b' is measure of

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Intermolecular repulsions

Intermolecular collisions per unit volume

Volume occupied by the molecules

Intermolecular attraction

If pH of buffer of 1 mole dm^-3of HCOOH + 0.1 mole dm^-3HCOONa having pKa = 3.78 is

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1.78

2.78

3.78

4.78

Among the following polymers, the strongest molecular forces are present in

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Elastomers

Fibres

Thermoplactics

Thermosetting polymers

Saponification of ethyl benzoate with caustic soda

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Benzyl alcohol,ethanoic acid

Sodium benzoate, ethanol

Benzoic acid, sodium ethoxide

Phenol, ethanoic acid

During electrolysis, the reaction that takes place at cathode is :

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Reduction

Both (a) and (c)

Oxidation

No reaction occurs

Acetylene gives

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White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu(NO3)2

White ppt. with ammonical AgNO3 and red ppt. with ammonical Cu2C12

White ppt. with both

Red ppt. with both

The organic compounds containing Ph--OH group are called:

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Phenol

Aldehyde

Ketones

Carboxylic acids

Which of the following was discovered first:

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Charge to mass ratio of electrons.

Mass of electrons.

Charge of electrons.

All of above at same time.

The number of spherical nodes in 3p orbitals are

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One

Three

Non

Two

Benzene hexachloride is used as

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Dye

Antimaterial drug

Antibiotic

Insecticide

3-d series elements are present in:

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First period

Second Period

Third period

4th period

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Adding 2(ii) + 3(iii) and subtracting i

Add i + ii + iii

Add i - ii + iii

Add i - ii - iii

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