Question # 1

A man has to think of alternate sources of energy due to

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Shortage of vehicles

Shortage of fossil fuels

Construction of house

Running of power plant

Which of the following is not a naturally occurring dye.

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Indogo

Indigotin

Alizarin

Malachite green

The formula of Bauxite is.

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Al2O3

Al2 O3. 2H2O

AL2O3, H2O

Na3AIF6

Citral when heated with KHSO4 forms.

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Isoprene

p-cymene

p-menthane

Dipentene

Each of the following compound react with Grignard's reagent to form alkane exxcept.

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Ethanal

Ethanoic acid

Ethanol

Ethync

Group III A of the periodic table consist of elemetns.

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3

4

5

6

The Ostwald process is the main method for the manufacture of nitric Acid in the fist step in this process is.

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Nitrogen and hydrogen react to form NH3

Ammonia is burned in O2 to generate N2 and H2O

Nitrogen and oxygen react to form NO2

Ammonia is burned with O2 to generate NO and H2O

The pH Value 4.2 is of

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Vinegar

Lemons

Oranges

Tomatoes

Among sodium phosphate, sodium sulphate and sodium chloride the solubility in water increases as.

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Chloride > Phosphate > Sulphate

Sulphate > Pohosphate> Chloride

Chloride > Sulphate > Phosphate

Phosphate > Chloride > Sulphate

The element with maximum first ionization energy is.

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B

N

O

C

The electromagevitiy of the following elements increase in the order

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F > Cl > O > S

S > Cl > O > F

F > O > N > C

C > O > N > F

The temperature at which the vapour pressure becomes equal to external pressure is called.

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Saturation point

Critical temperature

Consolute temperature

Boiling point

Which of the following compounds has highest boiling point.

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HI

HF

HBr

HCl

Ozone hole refers to.

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Black hole

Decrease to thickness of ozone layer in stratosphere

Decrease of thickness of ozone in troposphere

Increase concentration of ozone in the atmosphere

Elements in which differentiating electron enters the (n-1) the d-orbitals of the (n-1) the main shell are called elements.

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s- block

p-block

d-block

f-block

Xenon reacts best with

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The most electropositive elements

The most electronegative elements

The hydrogen halides

Non metals

A mixture of weak acid and its salt is.

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Alkaline buffer

Acidic buffer

Neutral buffer

All of above

The splitting of H2O can be carried out through

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Photolysis

Electrolysis

Dialysis

Hydrogenation

The by -product of the process of saponification is.

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Methanol

Glycol

Glycerol

Absolute alcohol

Which of the following properties does not depend upon the numeb rof solute particles.

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Elevation in B.P.

Osmotic pressure

Depression in F.P.

Boiling point of the solvent

Stable metal ions strictures are.

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Noble gas structure

Is electron group structure

Transition metal in structure

All of the above

pKa value of hyponitrous acid is.

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-7.0

8.9

4.1

6.6

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

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1

4

4-1

zero

Which of the following is not a ligand or complexing agent.

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NH3

CH3COOH

EDTA

CN-

An electron has types of motion

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Spin motion

Orbital motion

Both A and B

None of above

Which of the following statement is not related with the advantages of TLC.

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A variety of adsorbents can be used

The thickness of adsorbent can be varied

Fluorescence can be introduced

Different detectors can be used

Glass obtained by placing a layer of butyral plastic with a suitable adhesive between two layers of glass and cementing them by heat and pressure is called.

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Glass wool

Safety glass

Optical glass

Jena glass

Cytosine a pyrimidine base pairs with

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Guanine

Thymine

Adenine

Any of these

Metal crystallize is system having co ordination number

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8

12

14

any one of above

The one which is not a purine base

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Cytosine

Guanine

None of these

Adenine

An explosive

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Nitroglycerine

Trinitrotoluene

Fluorine perchlorate

All above

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