Question # 1

The most suitable method of separation in mixture of o-and p- nitrophenol is.

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Steam distillation

Chromatography

Ion-exchange

Sublimation

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]

Lactic acid is a molecule which shows

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Epimersim

Tautomerism

Opical isomerism

Metamerism

What types of bonding occurs in d-block elements.

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Ionic

Covalent

Metallic

Both B and C

An sp3 hybrid orbital contains

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1/4 a character

1/2 a character

2/3 a character

3/4 a character

The correct order of ionic radii for the following ions is.

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S²- < P^3- < Cl- < K+

Cl- > S2+ > P3- > k+

K+ > Cr > S2+ > P3-

P3+ > S2 > Cl - > K+

Which of the following test is not shown by proteins.

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Xanthoproten test

Ninhydrin test

Hopkin cole test

Muliken Barker test

Major principle underlying the sustainability of natural ecosystems is that they run on.

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Electric energy

Solar energy

Wind energy

None of the above

The equilibrium constants Kp and Kc are related as

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Kp = Kx Pdelta n

K p= Ks/P delta n

Ks = Kp (RT)delta n

Kx = Kp (P/RT) delta n

The addition of As to Ge makes the latter a

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Metallic conductor

Ionic conductor

Intrinaic conductor

Extrinsic semiconductor

The atomic and ionic radii value on moving from left to right in the sereis.

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Increase

Decrease

Does not change

None of above

Bond angle is minimum in

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H2O

CO2

NH3

CH4

Environmental pollution refers to.

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Peeling of top soil

Dissipation of energy

Release of toxic materials in environment

None of the above

The major role of Flurospar which is added in small quantities in the electrolytic reduction alumina dissolved in fused cryolite is.

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As a catalyst

To make the fused mixture very conducting

To lower the temperature of the melt

To decreases the rate of oxidation of carbon at the anode

The IUPAC name of C2(CN)3 is

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2,3-dicvano butanedinitrile

2,3 -dicyano -2- butenedinitrile

1,1,2,2-tetrcyanoethane

1,1,2,2, tetracyanocthenc

Chlorofluorocarbon are widely used as coolants in.

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Air conditioners

Clearing solvents

Aerosol propellant's

All above

Which of the following symmetry element leaves the molecule or an object unchanged.

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Proper rotation

Improper rotation

Inversion axis

Identity

Which among the following hydride is ionic in nature.

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Ammonia

Protium oxide

Calcium hydride

Sulphane

Complete hydrolysis of nucleotide result in the formation of.

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Heterocyclic bases

A pentose

A phosphate ion

All of these

Codon for amino acid glycinc is not represented by base pair

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GCA

GGC

GGA

GGU

Which of the following elements of group 15 is a typical metal.

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P

As

Bi

Sb

Which of the following effects best explains that o-nitro phenol is insoluble in water.

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Inductive effect

Resonance effect

Intramolecular H -bonding

Isomeric effect

Which of the following compounds is must acdic.

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H2O

H2S

H2Se

H2Te

The green color of water in a lake is due to

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Excessive growth of sea weeds

Algae

Pollution

Grass

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

Which of the following substance has been advocated as fuel of future.

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O2

N2

H2

H2O

What is the approximate chromium range of a ferritic stainless steel.

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12% to 18%

16% to 20%

20% to 24%

12% to 16%

The conductance of 1 cm3 of an electrolytes solution is called its.

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Specific resistance

Specific conductance

Molar conductance

Equivalent conductance

Cytosine a pyrimidine base pairs with

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Guanine

Thymine

Adenine

Any of these

Which of the following should have the largest dipole moment.

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Carbon tetrachloride

Cis-stibeue

Trans-atibeue

Cis-dichlorocthylene

Which is incorrect statement for Xe F2.

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It has linear structure.

It is hydrolyzed rapidly in aqueous solution of a base

It oxidizes Cl and I to Cl2 and I 2 respectively

It cannot act as F donor

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