Question # 1

A unit cell having dimension , a = b c, alpha, beta, gama = 90^o is known as.

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Cubic

Hexagonal

Orthorhombic

None of them

Which of the following statements is wrong.

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Covenant compounds are generally soluble is polar solvents.

Covalent compounds have low melting and boiling points

Lower than that of separate H atoms

Sometimes lower and sometimes higher than that of separate H

Which of the following is not a component of hollow cathode lamp.

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Anode

Cathode

Filter gas

Atomic vapour

Which of the following techniques is used to separate a mixture of cations.

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GC

FPLC

Ion exchange chromatography

Size exchange chromatography

Any substance which has solidified from the liquid state with crystallization is known as

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Steel

Fibre

Glass

Asbestos

Hybridization involves.

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Orbitals of same atom with slightly different energies.

Orbitals of different atoms, but with equal energies.

Orbitals of the same atom but with widely different energies.

Orbitals of different atoms with different energies.

The Langmuir theory of unimolecular adsorption is generally valid at.

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Low pressures and low temperature

Low pressures and high temperature

High pressures and low temperature

High pressure and high temperature

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

Four elements A, B,C,D have atomic numbers Z , 1 ,Z, Z +1 and Z +2 Respectively If Z is 9, then bond between which pair of elements will be ionic.

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A and C

D and C

D and B

B and C

All cycle engines working reversibly between same temperature of source and sink have the same efficiency This is the statement for the.

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Carnot cycle

Carnot theorem

Narnst theorem

Second law of thermodynamics

Pig iron is also called.

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Cast iron

Steel

Wrought iron

Stainless steel

According to the Grothus -Draper law

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Only absorbed light is effective in producing photo chemical changes

Only light between certain wavelengths

Light is effective only for photo chemical reactions is solution

The light absorbed in proportional to its intensity

Which is true for DDT it is.

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Not a pollutant

An antibiotic

A non degradable pollutant

A pesticide

Which of the following species is determined by complex metric titrations.

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K+

Na+

Ca+

Cl-

Which of the following statement is not related with the effect of thermal pollution.

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Decrease in BOD

Increase in BOD

Reduction in DO

Change in algal production

Thermocouples have been constructed from

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Chromel ve elumel

Copper vs platinum

Both

None

Oxides ores of Aluminium

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Corundum

Bauxite

Diaspore

All above

1-Butyne on oxymereuration -demercuration would give.

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Butanone

Butanal

Propanol and methanol

Propanoic acid and formic acid

The emission of light in a biological reaction is known as

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Fluorescence

Phosphorescence

Bioluminescence

Photolysia

Which of the following source of energy is abundant everlasting and non polluting.

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Nuclear

Electric

Solar

All above

Which of the following technique is based on the absorption of light radiation.

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Spectrophotomerty

Colorimetry

NMR

All the above technique

Which of the following has maximum number of unpaired electrons.

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Fe3+

Fe2+

Co2+

CO3+

Cement is a mixture of

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Clay and clinker

Clay limestone and gypsum

Limestone and gypsum

Binder

Buffer solution are used to.

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Increase the pH

Resist the pH

Decrease the pH

None of above

Which of the following process is not involved in the purification of bauxite.

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Bayer's process

Serpek's process

Hall's process

Goldsmith's process

Hydrolytic reaction of fat with caustic soda is known as ______

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Esterification

Saponification

Acetylation

Carboxylation

Toluene is o/p -orienting with respect to an electrophilic substitution reaction due to.

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+1 effect of the methyl group.

+1 as wellas +H effect of the methyl group

Hyper conjugatin between the methyl group and phenyl ring.

+ R effect of the methyl group

Which of the following interaction is the strong.

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Dipole -dipole

Ion induced dipole

Ion -dipole

Dipole induced diple

The study of coiled long peptide chains of protein to give a 3 dimensional structure is the study of.

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Primary structure

Secondary structure.

Tertiary structure

Quaternary structure.

Any property whose magnitude is independent of the amount of substance present is called a/an

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Extensive property

Colligative property

Structural propety

Intensive property

The point group of XeOF4 is.

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C6v

C4h

D4h

D2h

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