Question # 1

Alkanes are soluble in all except

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Benzene

Ether

Water

Carbon tetra chloride

Which of these polymers is a synthetic polymer?

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Animal fat

Starch

Cellulose

Polyester

How many g of dibasic acid (mol. wt. 200) should be present in 100 ml of the aqueous solution to give 0.1 Normality?

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1 g

2 g

10 g

20 g

Proton was discovered by:

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Chadwick

J.J. Rhomson

Millikan.

Goldstein.

The value of Plank's constant 'h' is

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6.625 x 10^-34

6.625 x 10^-34J sec

6.625 x 10^-34KJ

6.625 x 10^-34K Cal

Aliphatic carboxylic acids have carboxyl group attached to:

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Alkyl group

Aryl group

Phenyl group

Benzyl lgroup

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

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Pb

Cr

Hg

All of these

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Rate is independent of concentration of water since it is in excess

Rate is independent of concentration of ester since it is in exces

Rate depends upon the concentration of acid catalyst added

Rate = k[CH₃COOC₂H₅]^1/2[H₂O]^1/2

A compound contains one atom of oxygen and % of O 34.78, then molecular mass of compound is

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46

78

110

180

What is wrong about transition metals?

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Diamagnetic

Paramagnetic

Form complexes

Shows variable oxidation state

Coal is used to bake bricks in lime kiln:

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40%

60%

80%

None of these

Ethanol is prepared in Pakistan form fermentation of:

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Starch

Sugar

Glucose

Molasses

Hypo is used in photography for

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Developing picture

Picture printed

The colour of picture

The fixation of picture

Which of the following orbitals have a dumb bell shape?

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s

p

d

f

Each of the following is true of white and red phosphours except that they

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Are both soluble in CS₂

Can be oxidized by heating in air

Consist of the same kind of atoms

Can be converted into one another

Metal used in the preparation of Grignard's reagent is:

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Ca

Na

Mg

Zn

Vinegar made form cane sugar, now a days synthetically contains

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Citric acid

Lactic acid

Acetic acid

Palmitic acid

A transition metal complex can be recognized by various terms. Which is not the proper term

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Central metal ion

Coordination number

Ligand

Geometry of complex

Acetylene when treated with 10% H₂SO₄in the presence of HgSO₄adds one molecule of water to form

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Aldehydes

Esters

Alcohols

Acids

Group l-A elements react with water fastly than the reaction of group ll-A elements because

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l_Aelements are more soft then ll_A

l_Aelements are non-metals

l_Aelements have 1 electron in their outermost s-orbital and are strongly electropositive

l_Aelements make ionic bond

Enzymes are chemically

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Carbohydrates

Proteins

Fatty acids

Phospholipids

Equal volumes of ethylene glycol (molar mass = 62) and water (molar mass = 18) are mixed. The depression in freezing point of water is (given K_rof water = 1.86 K mol^-1kg and specific gravity of ethylene glycol is 1.11)

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0.003

3.33

0.333

33.3

Organic acid without a carboxylic acid group is

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Ascorbic acid

Vinegar

Oxalic acid

Picric acid

Due to the bacterial action on wood it is converted into

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Peat

Lignite

Bituminous coal

Anthracite

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A strong reducing agent

A strong oxidising agent

Better oxidising agent than hydrogen

Less reducing agent than hydrogen

3.6% WN solution of HCI has the molairity

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1.0

1.15

0.98

1.98

The total number of transition elements is

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10

14

40

50

According to modern theory of chemical bonding atoms form bonds as it leads to a:

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Increase in energy.

No energy change.

Decrease in energy.

First decrease then increase in energy.

Acetamide and NaOBr/OH^-produce

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Ethanamine

Methanamide

CH₃CN

NH₃

Boiling point of acetic acid is°C:

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116

117

118

119

Which of the following is used as anesthetics

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Alcohol

Diethylether

Phenol

Dimethyl ether

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