Question # 1

They hydrolysis of methly acetate is a reaction of.

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First order

Second order

Third oirder

Fourth order

Which of the following is always true for the adiabatic expansion of gas.

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Temperature rises

Pressure rises

W=0

Q = 0

The word 'ceramic' meant for.

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Soft material

Hard material

Burnt material

Dry material

Which of the following impurities are present with the bauxite.

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Silica

Ferric oxide

Alumina

Both silica and ferric oxide

Which of the following statements is correct.

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A sigma bond is weaker than a pi pond

There are four coordinate bonds in the Lewis structure of NH4+ ion.

The 1 covalent bond is directional in nature

A single bond between the two atoms cannot be re bond.

Which of the following radical is not a member of II group.

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Cu²⁺

Cd²⁺

Ba³⁺

K+

When steam is passed over red bot coke The product formed is

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Hydrogen and carbon dioxide

Mixture of hydrogen and carbon monoxide

Mixture of hydrogen and oxygen

Heavy hydrogen

Organic substance responsible for the smell of flowers etc. are grouped together in chemistry as.

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Perfumes

Terpenoids

Flavonoids

Alkaloids

The steroid which plays an important role in carbohydrate metabolism is.

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Oestrone

Progestrrone.

Androsterone

Cortisone

Which substances is not used as an additive in paper industry.

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Glucose

Starch

Alum

None of these

In TGA, the width loss curve depends on the which instrumental factors.

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Furance heating rate

Recording or chart speed

Furnace atmosphere

All

The oxidation state shown by phosphorus is.

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- 3

+ 3

+ 3 and +5

-3 ,+ 3 and +5

Pick out the incorrect statement for Xe F6

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XeF6 is hydrolyzed practically to form XeOF4

It reacts with SiO2 to form Xe F4

On complete hydrolysis, it forms XeO3

It acts as F acceptor when treated with alkali metal fluoride, but cannot act as F donor to form complexes.

In the purification of bauxite , the ore is fused with sodium carbonate in the process

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Baeyer's process

Hall's process

Serpeck's process

Any of above

"Acids are substance whose aqueous solutions turned blue litmus red and tasted sour" stated by

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Davy

Liebig

Boyle

Rouelle

Mostly used solvents for ionic compounds.

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Liquid ammonia

Liquid SO2

Liquid HF

All above

Usually the rate of the reactions is expressed as.

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mol dm-1

mol dm-3 s-1

mol dm-2 s-1

mol 2 dm-3 s-1

Which of the following is most basic.

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Aniline

Benzylamine

Diphenylamine

N-methylaniline

Which of the following is not known.

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KrF6

XeF6

XeO3

KrF2

Which of the following is not a component of flame photometer.

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Pressure regulator and flow meter

The atomizer

The burner

Hallow cathode lamp

A combination of atomic orbitals produces a large number of closely special energy states brown as.

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Packet of energy

Band of energy

Botha a and b

None of the above

The three dimensional silicate anion (Si2O5^2-)n is present in

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Beryl

Silica

Asbestos

Clays

Separation of isotopes of uranium is carried out by

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CaF2

SF6

HF

All above

How many unpaired electron are there in a strong field iron (II) octahederal compled.

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0

1

2

4

How many varieties of commercial iron are known.

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1

2

4

3

Helium contents in the atmosphere by volume.

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0.0005%

0.0015%

0.0001%

0.00001%

The device that convert the chemical energy of fuel directly into electrical energy is called.

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Galvanic cell

Electrolytic cell

Fuel cell

Concentration cell

Which of the following is an alloy of copper

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Brass

Bronze

Monel metal

All

CoCl3 ,6NH3 has six NH3 molecules that satisfy the valency of the Cu3+ metal ion

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Primary

Secondary

Both A and B

None of above

An ionic compound X + Y - is most likely to be formed if

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Ionization enthalpy of X is high electron gain ethalpy of Y is low

Ionization enthalpy of X is high electron gain enthalpy of Y is high

Ionization enthalpy of X is low,electron gain enthalpy of Y is low

Ionization enthalpy of X is low electron gain enthalpy of Y is high

Carbohydrates are characterized by the presence of.

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Hydroxyl group

Carbony group

Asymmetric carbon

All of these

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