Question # 1

The formula of ketone is

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None of these

C₂H₅CHO and (CH₃)₂CO can be distunguished by testing with

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Phenyl hydrazine

Hydroxylamine

Fehling solution

Sodium bisulphate

Which of the following is obtained by condensation polymerization?

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Polyethene

Teflon

Phenol formaldehyde resin

Nitrile rubber

The number of unpaired electrons in Mn²⁺is

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5

4

3

2

Which one of the following is a buffer

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HCI + NaCI solution

CH₃COOH + CH₃COONH₄solution

H₂SO₄+ CaSO₄solution

CH₃COOH + CH₃COONa

A six membered ring containing one double bond called

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Cyclohexene

Cyclohexane

Cyclohexadiene

None

Number of neutrons in heavy hydrogen atom is

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0

1

2

3

Physical properties of alkanes increase with increase of all physical constants except

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Boiling points

Melting points

Density

Solubility

The addition of unsymmetrical reagent to unsymmetrical alkene is in accordance with the rule:

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Hund's rule

Markownikov's rule

Pauli's Exclusion Principle

Auf bau Principle

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The value of K_pfalls with a rise in temperature

The value of K_pfalls with increasing pressure

Adding V₂O₅catalyst increase the equilibrium yield of sulphur trioxide equilibrium yield of sulphur trioxide

The value of K_pis equal to K_c

The most commonly and widely used nitrogen fertilizer in Pakistan is

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Urea

Ammonium nitrate

Ammonium sulphate

Ammonium chloride

The radius of second Bohr's orbit is

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0.053 nm

0.053/4 nm

0.053 x 4 nm

0.053 x 20 nm

The coinage metals are

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Ni, Pd, Pt

Cu, Ag, Au

Zn, Al, Pb

Fe, Si, Sn

Free radical mechanism of halogenation of alkanes follow step:

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Initiation

Propagation

Termination

All of these

The chemical formula of chile salt peter is

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Na₂CO₃

KNO₃

NaNO₃

NaNO₂

Cu²⁺with d⁹electronic configuration appears

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Yellow

Pink

Blue

Green

The % of CO₂is the atmosphere is

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3.0%

0.03%

0.3%

0.5%

The forced which holds together two or more atoms or ions to form a large variety of compounds in called:

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A chemical bond.

An ionic bond.

A covalent bond.

A coordinate bond.

The solubility of PbF₂is 2.6 x 10^-3mole dm^-3then its solubility product is

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2.6 x 10^-3

6.76 x 10^-6

5.2 x 10^-6

7.0 x 10^-8

Vinegar made form cane sugar, now a days synthetically contains

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Citric acid

Lactic acid

Acetic acid

Palmitic acid

Extent to H₂ + L₂à2Hl can be increased by :

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Increasing temperature.

Increasing product.

Increasing pressure.

Adding a catalyst.

In a hydrogen-oxygen fuel cell, combustion of hydrogen occurs to

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Generate heat

Remove adsorbed oxygen from electrode surfaces

Produce High purity water

Create potential difference between two electrodes

When the solute is present in trace quantities the following expression is used

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Gram per million

Milligram percent

Microgram percent

Parts per million

The reaction in which ketone is reduced to the alkane is called

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Kolb

Clemmensen

Cannizzaro

None

Grignard reagent is reactive due to :

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The presence of halogen atom

The presence of Mg atom

The polarity of C - Mg bond

None of them

The correct relation b/wK_{c and}K_{p is :}

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K_p = K_c[P/N] ^Δn

K_{c =}K_p(RT) ^Δn

K_{p =}K_c(RT) ^Δn

Which of the following is the repeating monomeric unit in cellulose

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Sucrose

Maltose

Cellobiose

Glucose

Cane sugar is not soluble in benzene but soluble in water because

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Cane sugar is a macro molecule

Cane sugar is an ionic compound

Can sugar has hydrogen bonding

Can sugar is an organic molecule

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32

64

16

4

A suitable solvent should dissolve maximum amount of solute at its boiling point and minimum amount at :

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Freezing point.

Room temperature.

Boiling point.

Sea level temperature.

Which gasses are produced from landfills

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NH₃

H₂S

N₂

All of these

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