Question # 1

In the presence of high temperature and pressure peat is converted to:

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Lignite

Polymorphism

Polymerization

Catenation

Acyl halide is formed by reacting PCl₅with

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Alcohol

Ester

Amide

Both carboxylic acids as well as esters

Ethanol is prepared in Pakistan form fermentation of:

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Starch

Sugar

Glucose

Molasses

95% alcohol is called

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Rectified spirit

Spirit of wine

Spirit

Methylated

In the atmosphere, O₂is about

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10%

15%

21%

25%

Rutherford's planetary like picture of the atomic modal was defective because

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It did not describe the quantity of positive charge

It did not explain the repulsion of protons within the nucleus

No empty space between nucleus and the electrons

Moving electron should radiate energy

Which of the following polymers is used for weather resistant paints

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Arcylic resins

Polyvinyl acetate

Polystyrene

PVC

Hydrogen chloride molecule contains

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Covalent bond

Double bond

Co-ordinate bond

Electrovalent bond

0.1 MHCI has pH = 1.0, it is about 100 times stronger than acetic acid. Then pH of acetic acid will be

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0.1

2.0

1.3

3.0

Alcohols of low molecular weight are

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Soluble in water

Soluble in water on heating

Insoluble in water

Insoluble in all solvents

The velocity of photon is:

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Independent of its wavelength.

Depends on its wavelength.

Equal to square of its amplitude

Depends on its source.

The fibre which is made form acrylonitrile as monomer

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PVC

Rayon fibre

Acrylic fibre

Polyester fibre

Cracking done at low pressure and with a catalyst is called _______ cracking

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Thermal

Catalytic

Steam

None of them

The mass of one mole of proton is

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1.008 g

0.184 g

1.673 g

1.008 mg

Which of the following is hypnotic?

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Acetaldehyde

Metaldehyde

Paraldehyde

None

The heat energy change during a chemical reaction at constant pressure and at a given temperature is called

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Change in internal energy

Enthaply change

Temperature change

Work done by the system

Which of these always applies to a nucleophile

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It attacks a double bond

It has a lone pair of electrons

It is single atom

It is negatively charged

In carboxyl group the bond between C and oxygen is:

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Sigma bond

Single bond

Double Bond

Triple bond

How does the ionization energy of 1st group elements vary?

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Increases down the group

Decreases down the group

Remains unchanged

Variation is not regular

Out of Cu, Ag, Fe and Zn the metal which can displace all others from theri salt solution is

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Ag

Cu

Zn

Fe

Two different hydrocarbon each contain the same percentage by mass of hydrogen. It follows that they have the same

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Empirical formula

Number of atoms in a molecules

Number of isomers

Relative molecular mass

For effective collisions the molecules slow down before collision and their kinetic energy decreases which results in increase in their

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Activation energy

Average energy

Potential energy

Collisions frequency

Write the name of following alkene CH₂= CH - CH = CH₂

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1,3 butadiene

Butra -1, 3-diene

Both a & b

None

How many molecules of chlorine adds in benzene in the presence of sunlight

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One

Two

Three

Four

Unpleasant smell of carbylamine is obtained when chloroform and alcoholic KOH are heated with

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Any aromatic amine

Any primary amine

Any amine

Any aliphatic amine

A carbon atom carrying a postitive charge and attached to three other atoms of groups is called

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Caronium ion

Carbanion

Oconium ion

Carba ion

Primary alcohols and aldehydes are oxidized to corresponding:

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alkanes

alkenes

Alkynes

Carboxylic Acid

The element with atomic number 55 belongs to which block of the periodic table

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s-block

p-block

d-block

f-block

The effective activity of a metal catalyst is increased if it is in

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Solid form

Liquid state

Gaseous state

Finely divided form

95% ethanol is called:

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Rectified other

Diesel

Rectified spirit

Petrol

Units of molarity are

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gm/lit

mol/lit

kg/lit

None of these

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