Question # 1

At present the number of cement factories is Pakistan are

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20

22

25

30

Addition of unsymmetrical reagent to an unsymmetrical alkene is governed by

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Cannizzaro's Reaction

Aldol Condensation

Kirchhoff Rule

Markownikov's Rule

Charles's law is only obeyed at which temperature scale

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Celsius

Kelvin

Fahrenheit

both A&B

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

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950-1300C

250-500C

500-900C

900-1000C

Enthalpy of a reaction can be measured by

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Glass calorimeter

Barometer

Manometer

Thermometer

Nitro alkanes exhibit the:

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Chain isomerism

Positional isomerism

Functional group

Metamerism

2-propanol on oxidation yield

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Propionaldehyde

Propanone

Propanal

Butanal

In a closed vessel a gas is heated from 300 K to 600K The kinetic energy becomes remains

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Double

Same

Half

Four times

Surface and ground water sources are contaminated by various human activities which of the followings is not a human activity that causes contamination in fresh water

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live stock waste

oil leaks and spills

disposal of industrial effluents

rain

Hydration of ethene is an example of

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

Amides are

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Strongly basic

Weakly basic

Acidic

Strongly

What is the maximum mass of aluminium which can be obtained from 240g of aluminium oxide Al₂O₃?

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26 g

127 g

51 g

108 g

The concentration of reactants is increased by x, then equilibrium constant K becomes

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ln K/x

K/x

K + x

K

6-d series is in the period :

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4th

5th

6th

7th

Urea has concentration when prepared before prlilling:

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46%

82%

99.7%

100%

The total number of rare earth elements is

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8

32

14

10

Which of the following favours the reverse reaction in chemical equilibrium?

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Increasing the concentration of the reactant

Removal of the least one of the products at regular intervals

Increasing the concentration of one or more of the products

None of these

Functional group of ketones is:

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---CHO

---CO---

---C≡ N

---COOH

Iodine value of an oil or fat may be defined as

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The number of grams of iodine taken up by 1 g of the oil or fat

The number of grams of iodine taken by 10 g of the oil or fat

The number of grams of iodine taken by 100 g of the oil or fat

None of the above

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Electrophilic addition

Electrophilic substitution

Free radical substitution

Nuclophilic addition

which of the following has smaller size:

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Fe+³

Fe+²

Fe+¹

Fe

Dehydration of glycerol give

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Propane

Propene

Acrolein

Benzene

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