Question # 1

Black and white photographic film contain small grains of.

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Silver bromide

Silver cholride

Silver iodide

Any of above

When 0.01 moles of NaOH are added to a buffer solution, its pH changes from 4.745 to 4.832 WHAT IS ITS.

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0.115

0.900

0.015

0.215

The alkaline hydrolysis of fat is know as

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Condensation

Esterification

Saponification

Emulsification

In proper rotation (Cn) an object is rotated through an angle of.

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a/n radians

2n/n radians

3n/n radians

4n/n radians

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.

Temporary hard water is softened on industrial scale by adding.

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Mg(OH)2

Ca(OH)2

KOH

NaOH

The IUPAC name of ethylene oxide is.

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Epoxy methane

Oxcethene

Methoxymethane

All of the above

CFSE for d⁷ ion is.

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0.8

-0.8

-1.8

1.8

Which of the following is the second anciently known metal.

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Nickel

Copper

Gold

Silver

Apoenzyme is

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Hydrolytic enzyme

Oxidative enzyme

Coenzyme

Protein part of enzyme after removal of coenzyme

The following ceramic product is mostly used as pigment in paints.

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TiO2

SiO2

uo2

ZrO2

For a given mass of a gas, if pressure in reduced to half and temperature in doubled, then volume.

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2V²

4V

8 V

V²

Which of the following steps is not involved in chemical analysis.

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Separation of sample in pure form

Separation of the sample in the mixture form

Preparation of sample for the analyisis

Validity of experimental results

According to CFT the metal ligand bond is considered to be ionic to presentage.

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100%

90%

50%

70%

In which polymer the strength of inter molecular forces is maximum

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Elastomers

Thermoplastic

Fibre

Cross linked polymer

Sanger's reagent is

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Carbobenzyloxy chlride

Dimethyl amino sulphonyl chloride

I-Fluoro -2,4-dinitrobnzene

2,4- Dinitrophenyl hydrazine

In coordination chemistry the donor atom of a ligand is.

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A Lewis acid

The counter ion

The central metal atom

The atom in the legend that shares an electron pair with the metal

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

The process requirieng the absorption of energy of.

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F = F

Cl = Cl

H = H

O = O

In B2H6 molecule

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There exists a direct B-B a -bond

All the atoms are in one plane

All the B-H bonds are normal covalent bonds

There exist two bonds between the boron atoms.

The number of phases of mixtures of four gases enclosed in a container is

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1

4

4-1

zero

Casionic polymerization is initiated by

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BF3

NaNH2

Bul

Both b and c

Which of the following is not a property of aluminium.

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An efficient electrical conductor

A low density compared to other metals

Is amphoteric

Toxic to humans

Which of the following allows charge transfer through the solution but prevents mixing of the solution.

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Anode

Cathode

Electrode cell

Salt bridge

The coordination number of closely packed hexagonal is.

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4

6

8

12

Ionic compounds in general possess both

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High melting point and non -directional bonds

High melting points and low boiling poinits

Directional bonds and low boiling points

High solubility in polar and non -polar bonds.

Mostly used solvents for ionic compounds.

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Liquid ammonia

Liquid SO2

Liquid HF

All above

The digits which are necessary to express the result of a measurement to the precision with which the measurement is made are called.

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Non significant figures

Mathematical figures

Significant figures

Reagent errors

The oxidation state shown by phosphorus is.

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- 3

+ 3

+ 3 and +5

-3 ,+ 3 and +5

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

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O2

N2

H2

H2O

Graphite is a good conductor of electricity because is.

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Has sp2 hybridized carbon stoms

Has free electrons

Is crystalline

Has free atoms

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