Question # 1

Carbon and Hydrogen are estimated by

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Liebig's method

Kjeldhal's method

Carries method

None of the above

Lactic acid is a molecule which shows

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Epimersim

Tautomerism

Opical isomerism

Metamerism

The bond angle between hybrid orbitals in methane is

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115.5^o

109.5^o

105,7^o

120^o

What is the possible number of optical isomers for a compound contained 2 dissimilar asymmetric carbon atoms.

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2

4

6

8

Monomers are Teflon is

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Monochloroethene

1,2- Difluoroethene

1,1,2- Trifluoroethene

Tetrafluoroethene

Which of the following is most acidic.

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Phenol

p-nitrophenol

o-Nitrophenol

m-Nitrophenol

An example of nitro dyes is.

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Martius yellow

Auramine O

Malachite green

Methyl red

Hydrolysis of nucleoprotein result in the formation of.

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Proteins

Nucleic acids

Both A and B

They do not hydrolyse

High density polyethylene has which type of structure.

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Linear

Branch chain

Cross linked

Any one of these

Identify the incorrect statement regarding crystallization from the following.

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It is an important procedure for purifying solids

The impurities are removed by filtering the solution

Crystals are separated by filtration

In crystallization method, the solid is dissolved in a solvvent in which it is soluble at all temperature.

Essential oils are purified by which of the following methods.

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Steam distillation

Sublimation

Crystallization

Fractional crystallization

Who proved that all the six hydrogen atoms in benzen are equivalent.

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Kekule

Ladenburg

Faraday

Wohler

Enantiomers have which of the following characteristics.

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Rotate ordinary light

Have the same melting point

Are superimposable mirror images

React with optically active molecule at the same rate

Which of the following statement is not correct n respect of Arrhenius concept.

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The concept is applicable only for aqueous systems.

Neutralization takes place in aqueous mediam only

TH+ ion cannot remain as such in water

This concept is applicable for non aqueous system only.

Alkaline hydrolysis of chloroform produces.

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HCCO

HCOO - + CO

H3COH

CHCL2 OH

Coagulation of protein on treatment with heavy motal salts or heating is called.

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Decolorisation

Denaturation

^{Sedimentation process}

Reversible precipitation

Two solids A and B have appreciable different solubility in water but their m.p. are very close. The mixture A and B can be separated by.

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Sublimation

Distillation

Fractional crystallization

Specific rotation

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

The deficiency of which vitamin leads to beri brainteaser

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Thiamine

Riboflavin

Pyridoxine

Asorbic acid

Arrangement of peptide chains of protein in spec to form helix stucture is referred to as.

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Primary structure

Secondary structure

Tertiary structure

Quaternary structure

Which type of polymers the Vulcanised rubbers is.

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Linear

Cross jinked

Branch chain

Any one of these

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