Question # 1

Which of the following is soluble in water?

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СН3ОН

CCL4

CHCI3

CS2

Which of the following is not an electrophilic substitutional reaction of benzene?

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Free radical chlorination of benzene

Friedel Craft alkylation

Sulphonation

Nitration

The pH of neutral water is 6.8 then the temperature of H2O is

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25°C

More than 25°C

less than 25 C°

Not predicted

Which of the folowing compound is expected to be colored

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Na2SO4

ZnCl2

MgF₂

CuF₂

The reason that diamond and graphite have different physical properties is

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density

color

bonding

hardness

Phenol is completely soluble in water above

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25°C

62.3℃

68.5°C

66.50°c

Which compound shows the highest melting point

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water

Propanoic acid

Methanoic acid

Ethanoic acid

When a metal rod is dipped in its one molar ionie solution

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Electricity is produced

Electricity is consumed

Redox reaction occurs

Potential difference is set up

Lithium differs from rest of members of its group due to which of following reasons

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High E.N of Li+1

Small radius

High charge density

All above are correct

State of hybridization of carbon in the carbocation is

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sp3

sp

sp2

dsp2

The charring of glucose when it is heated with conc.H₂SO₄ is due to

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Oxidation

Reduction

Dehydration

Dehydrogenation

Alcohols, phenols and ethers may be considered as derivative of

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Hydrocarbons

Benzene

Carboxylic acid

Water

Which of the following is not fatty acid?

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Propanoic acid

Acetic acid

Phthalic acid

Butanoic acid

Purification of an impure copper is made by electrolytic cell, in which impure copper is anode and pure copper is cathode, and the electrolyte used is

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H₂SO₄

CuSO₄

ZnSO₄

Na₂SO₄

Carboxylic acids on complete reduction in the presence of HI and red Phosphours gives:

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esters

alcohols

alkanes

aldehydes

The reduction potential to copper electrode is +0.34 V and that of Zn electrode is -0.76 V. when these two are coupled the e.m.f. of the cell is

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-0.42 V

+0.42

-1.10 V

+1.10 V

The geometrical shape of a transition complexion is related to the state of hybridizing of the central atom. What is trigonal bipyramidal

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sp³

dsp²

dsp³

d²sp³

The wave length of electron as wave is 0.5 nm. What is the wave length in meter

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5 x 10^-9

5 x 10^-12

5 x 10^-6

5 x 10^-10

The weight of pure NaOH required to prepare 250 cm³of 0.1 N solution is

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4 g

1 g

2 g

5 g

Which of the following is the use of electrolysis?

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Eletrorefining

Electroplating

Both A and B

None of the above

Two elements whose electronegativities are 1.2 and 3.0, the formed between them would be

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Ionic

Covalent

Coordinate

Metallic

Rusting of iron is catalysed by

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Fe

O₂

Zn

H⁺

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