Question # 1

Which of the following is not a characteristic of dye.

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It must have suitable colour

It must be able to fix to fibre

It must be fast to wash and lights

It must be highly soluble in water

Strength of H bond in inter mediate between

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Van der Waals forces and covalent bond

Ionic and covalent bond

Ionic and metallic bond

Metallic and covalent

The increasing order of energies of various sub shells is

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1s < 2s<3s<2p<3p<4s<3d

1s <2s<2p<3s<3p<4s<3d

1s>2s>2p>3s>3p>4s>3d

1s>2s>2p>3p>3d>4s

Which of the following gas is not used as carrier gas in GC.

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Argon

Nitrogen

Helium

CO2

Which of the following has the highest lattice energy

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LiCl

NaCl

KCl

CaCl

Which among the following hydride is ionic in nature.

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Ammonia

Protium oxide

Calcium hydride

Sulphane

The wire of flash bulb is made up of.

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Cu

Ag

Mg

Ba

The possible sub levels in the n = 4 energy level are.

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s,p,d

s,p,d,f

s

s,p

C - O bond lengths in carboxylate anion are equal due to.

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Resonance effect

Inductive effect

Resonance of identical contributing structures.

Hyperconjugation

in the process of production of soap the soap can be salted out by adding

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Concentrated sulphuric acid

Concentrated potassium hydroxide solution

Concentrated sodium chloride solution

None of above

Which among the following is secondary pollutant.

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CO

CO2

PAN

Aerosol

All the member of group III A are metals except.

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B

Ai

Ga

In

To obtain cement dry powder, lime stones and shales or their slurry, is burnt in a rotary kiln at a temeperature between

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1100 ^o and 1200 ^oC

1200 ^o and 1300 ^oC

1400 ^o and 1500 ^oC

1900^o and 2000 ^oC

Turpentine is obtained from._______________

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Oak tree

Pine tree

Birch tree

Lemon tree

A closed system is one which can exchange with surrounding.

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Matter but not energy

Energy but not matter

Both matter and energy

Neither matter nor energy

Which trihalide is not hydrolysed by water

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NF3

NCl3

PCl3

AsCl3

Dolmite is a mineral whose formula is.

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CaCO3

Mg CO3

CaCO3, MgCO3

CaSO4

The order in O2+ is

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1.0

1.5

2.0

2.5

In manufacturing of cement crystallization of amorphous dehydration products of clay

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500 ^oC to 800 ^oC

900 ^oC to 1200^oC

1250 ^oC ti 1400 ^oC

1000 to 1100 ^oC

The 'shape' of molecule ." Xe F6 is.

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Pentagonal bipyramidal

Regular octahedral

Distorted octahedral

Square planar

Atomic volume of C, N, O and F are in the order

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C > N > F > O

C > N > O > F

F > O > N >C

N > C > O >F

Which of the following statements is not correct about noble gases.

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Their ionization energies are very high

Their electron affinities are nearly zero

They do not form any chemical compounds

They are not easily liquefied

Which of the following pollutant result from roasting and heating processes.

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Dust

Smoke

Metal fumes

All above

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

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Mg²⁺

Co²⁺

Ni²⁺

Mn²⁺

Which of the following statement is not true regarding Open Hearth process.

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No iron is lost

The process is economical and simple

Steel obtained is of high quality

Scrap iron cannot be used in this process.

Which of the following electrolytes will be most effective in the coagulation of arsenic sulphide sol.

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NaNO3

AI PO4

MgSO4

K4[Fe(CN)6]

Which of the following statement is no true with respect to nitrogen dioxide.

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It is produced by the oxidation of NO

Its small concentration has been detected to lower stratosphere

It is major pollutant

It does not absorb sunlight.

Indicate the false statement about corrosion.

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Plastics and ceramics are immune to many forms of corrosion because they are not good conduction of electricity.

The corroded member in a corrosion cell is the cathode

Passivity is a prerequisite for the corrosion protect on many metals

None of these

The maximum number of electrons in first energy levels are.

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1

2

8

10

The statement that heat cannot flow spontaneously from a colder to a hotter body is the result of.

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The first law of thermodynamics

The second law of thermodynamics

The third law of thermodynamics

Henry's law

Which of the following equations represent linear free energy relationship.

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Hammett equation

Taft equation

Helmholtz equation

Differential equation

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