Question # 1

Nitrobenzen can be prepared from benzene by using a mixture of conc. HNO3 and conc. H2SO4 In the nitrating mixture. HNO3 acts as a.

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Base

Acid

Oxidizing agent

Catalyst

Commercial or the phosphoric acid is pure.

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37.0%

82.98%

88.25%

90.12%

In the long form of periodic table, elements are arranged according to.

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Increasing atomic number

Decreasing atomic number

Increasing atomic mass

Decreasing atomic mass

Which of the following has the maximum tendency to form complexes.

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K

Na

Rb

Li

The value of an Einstein

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Is independent of wavelength

Decrease with increase in wavelength

Increase with increase in wavelength

Depends on the temperature of the absorbing system

In bi sulphate ion, the formal charge on sulphru atom is.

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+1

+2

+4

+6

A mordants is substance which in

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Coloured

Leuco -base of a dye

Fixes dye on the fabric

All of these

In an isochoric process

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Energy remains constant

Volume remains constant

Pressure remains constant

Temperature remains constant

Cobalt salt imparts which colour to the borax bead

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Blue

Green

Red

Yellow

Which of the following elements has the highest melting point.

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Magnesium

Calcium

Strontium

Berylliium

Which of the following is an important aspect of industrial ecology.

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Minimising air emissions

Minimising liquid waste

Recycling after use

All above

Which of the following is not a polysaccharide

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Cellobiose

Cellulose

Insulin

Amylase

The velocity possessed by maximum fraction of molecules at a given temperature is called.

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Average velocity

Root mean aquare velocity

Most probable velocity

None of the above

Each fat or oil in made up of

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A distinctive mixture of several different triglycorides

A distinctive mixture of several aldehydes

Mixture of above both

None of above

Hydrolith is the common name of

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NaH

CaH2

NaF

CaF2

Select a basic amino acid.

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Glycine

Cystine

Alanine

Lysine

Which of the following statement is not related to collision theory.

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Molecules must collide with each other to do a chemical reaction

Molecules must posses a minimum amount of energy

Molecules must have proper orientation

Collision theory is applicable to liquid only.

Ionic reactions mainly take place in.

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Aqueous solutions and organic solvents of high polarity

Non aqueous solvents of low polarity

Gaseous state

Solid state

Co enzyme cna be separated from enzyme by

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Precipitation

Dalysis

Hydrolysis

Distillation

According to Usanovich concept a base is defined as any species.

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Capable of giving up anions

Combining with cations

Neutralizing an acid to give a salt

All of above

Hydrogen at the moment of its generation is generally called.

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Protium

Nascent hydrogen

Atomic hydorgen

Heavy hydrogen

Which of the following techniques does not belong to column chromatographyy

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TLC

HPLC

Electrophoresis

Ion exchange

CoCl3 ,6NH3 has six NH3 molecules that satisfy the valency of the Cu3+ metal ion

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Primary

Secondary

Both A and B

None of above

The word 'ceramic' meant for.

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Soft material

Hard material

Burnt material

Dry material

Which of the following substance is most abundant of all components of atmospheric air.

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O2

N2

CO2

A2

Which of the following pairs shows diagonal relationship

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Li and Mg

Na and K

Zn and Cd

Li and BE

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

Most commercial glasses consist of

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Lime

Soda

Silica

All

Sanger's reagent is

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Carbobenzyloxy chlride

Dimethyl amino sulphonyl chloride

I-Fluoro -2,4-dinitrobnzene

2,4- Dinitrophenyl hydrazine

Which law of thermodynamics helps in calculating the absolute entropies of varies substances.

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Zeroth law

1st law

Second law

Third Law

The hydrogen bond is strongest in.

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O - H .............S

S - H.............O

F- H....................F

F - H...............O

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