Question # 1

Vitamin A is present in

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Liver

Milk

Green vegetables

All

Wt. of 112 ml of oxygen at NTP on liquification would be

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0.32 g

0.64 g

0.16 g

0.96 g

Which of the following units represents largest amount of energy?

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Calorie

Joule

Erg

Electron vol.

Water (H_2O) is liquid while hydrogen sulphide (H₂S) is a gas because

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Water has higher molecular weight

Hydrogen sulphide is a weak acid

Sulphure has high electronegativity than oxygen

Water molecules associate through hydrogen

By using the fluted filter paper rate of filtration is

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Increased

Decreased

Filtration is constant

Having no effect

Cannizzaro reaction is not given by

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Trimethyl acetaldehyde

Acetaldehyde

Benzaldehyde

Formaldehyde.

The essential component of organic compound is

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O

C

P

N

Which of the following is a colligative property?

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Melting point

Osmotic pressure

Freezing point

Sublimation temperature

Detergents are

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Synthetic products

Natural products

Both A and B

None of the above

1 mole of CH₄contains

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6.02 x 10²³atoms of H

4 g-atom of hydrogen

1.81 x 10²³molecules of CH₄

3.0 g of carbon

The formula to calcium cyanamide is

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Ca(CN)₂

CaC_2N

CaNCN

CaCHNH₂

Which of the following has linear shape?

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SP

SP²

SP³

None of the above

Given below are some statements concerning formic acid, which of them is true?

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It is a weaker acid than acetic

it is a reducing agent

When its calcium salt is heated, it forms a ketone

It is an oxidizing agent

When excess of SnCl₂is added to a solution of HgCl_{2, a white precipitate turning to grey is obtained. They grey colour is due to the formation of}

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Hg₂Cl₂

SnCl₄

Sn

Hg

Tollen's reagent is

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Ammonical cuprous chloride

Ammonical cuprous oxide

Ammonical silver bromide

Ammonical silver nitrate

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

The freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water in

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-1.86°C

-3.72°C

+1.86°C

+3.72°C

Which of the following statement is correct if the intermolecular forces in liquids A, B and C are in the order A < B < C?

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B evaporates more readily than A

B evaporates less readily than C

A and B evaporates at the same rate

A evaporates more readily than C

Natural fertilizer provides potassium in the form of K₂O (potash)

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1.5 kg

3 kg

4.5 kg

6.5 kg

Which is not a a colligative property?

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Osmotic pressure

Lowering of vapour pressure

Depression of freezing point

Elevation of boiling point

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

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Bonding begaviour

Electronegativity

Ionisation potential

Neutron/proton ratio

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