Question # 1

Which of the following is correct statement about cellulose

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It is sweet is taste

It contain 20% amylose

It is used in laundering

It containsβ1-4-linkage

The temperature of in the incineration of industrial and hazardous waste process has range

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900 - 1000°C

250 - 500°C

950 - 1300°C

500 - 900°C

Primany aleohols sornally give us aldehyde when oxidized in the presence of acidified Na2Cr2O7, what will be the product, when the secondary alcohols are oxidized in same condition?

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Alkenes

Alkyl halide

Alkynes

Ketones

Men residence time of methane in atmosphere in years is:

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1-7

2-7

3-7

4-7

An amino acid exists in the form of Zwitter-ion Which has:

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one - ve charge

one + ve charge

two + ve carges

one + ve and one -ve

Air contains 78% N₂, 21% O₂ and 1% other gases at sea level the partial pressure of O₂ is

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760 torr

159 torr

592 torr

7.6 torr

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called:

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fiber

plastic

varnish

polyamide resin

Ethylene polymerizes at 100 atm pressure and 400 °C to give

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Polybenzene

Polypropylene

Polyalcohol

Polyethylene

Combustion analysis is performed for the determination of

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Molar mass of the compound

Empirical formula of the compound

Structural formula of the substance

Mass of halogens present in organic compounds

Plastics are amorphous solids and

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have sharp melting points

undergo clean cleavage when cut with knife

do not undergo clean cleavage

possess orderly arrangement over long distances

What is the weight of 10 litres of CO₂at 27°C and 2 atm?

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89.3 g

36.1 g

125 g

127 g

During a chemical reaction heat may be

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absorbed

Evolved

Both evolved and absorbed

None of these

Vegetable oils are

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Unsaturated fatty acids

Glycerides of unsaturated fatty acids

Glycerides of saturated fatty acids

Essential oils obtained from plants

In the electrolysis of fused bauxite (Al₂O₃2H₂O) with fused Cryolite (Na₃AlF₆) using carbon rods as anode. The product obtained at cathode is

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Na metal

F₂gas

Al metal

O₂gas

Which statement is true for Na and Na⁺

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Size of Na is smaller than Na⁺

Size of Na is greater than Na⁺

Both have same properties.

Both have equal sizes.

Benzene is prepared from n-hexane in the presence of catalyst

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Cr₂O₃

Al₂O₃

SiO₂

All above

Micro-nutrients are required in quantity ranging form:

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4g-40g

6g-200g

6kg- 200 kg

4kg- 40kg

Reactions that proceed on both sides and never go to completion are called

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Irreversible reactions

Reversible reactions

Opposing reactions

Spontaneous reactions

Which of the following will have the highest boiling point at 1 atm pressure?

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0.1 M NaCl

0.1 M Sucrose

0.1 M BaCl₂

0.1 M Glucose

An ionic compound M₂S₃is formed by the metal M,, the metal is

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Ca

Ba

K

Al

If ionic product of a solution is greater than solubility product, the solution is

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Supersaturated

Saturated

Unsaturated

None of these

The cement plants in west Pakistan at the time of creation were:

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Ten

Twenty

Four

Twenty four

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