Question # 1

The isotonic nucleotide X and Y have mass numbers 35 and 37 respectively if the atomic number of X is 17 the atomic number of Y will be.

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15

17

19

18

Stable metal ions strictures are.

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Noble gas structure

Is electron group structure

Transition metal in structure

All of the above

Which of the following is strongest reducing agent.

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Be

Mg

Ca

Sr

Which of the following reacts with hemoglobin of blood and produce toxic effect.

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Carbon dioxide

Carbon monoxide

Oxygen

Carbon suboxide

Which of the following water require zero hardness.

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Boiler feed water

Laundry water

Paper will water

Dyeing water

Thermogravimetic analysis has application is which of the following fields

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Gravimetric analysis

Discovery of new methods ofseparation

Determination of purity and thermal stability

All above

Which of the following bonds between carbon -carbon is teh strongest.

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Sigma bond

Pi bond

Double bond

Triple bond

Which of the following is not a characteristic of phthalocyanine dyes.

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They are metal complex

the are insoluble in water

They have porphin nucleus

They are used in photographic plates

The purification of Bauxite can be carried out.

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Baeyer's process

Hall's process

Serpek's process

Any of above

H-Bond has more energy than the van der Waals forces i.e.

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1.0 kcal/mole

2.0 k cal/mole

10.0 kcal/mole

20. 0 kcal mole

How much amount of NaOH is required to prepare 100 mL of 1 N solution.

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80 g

4 g

40 g

zero

Which of the following substance is not weak electrolyte.

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CH3COOH

NH4OH

Oxalic Acid

NaCl

Example of intra molecular hydrogen bonding.

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O-nitrophenol

O-hydroxy benzaldehyde

O- hydroxy benzoic acid

All of the above

Permanent hard water is softened by addition of.

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Na2CO3

CaCO3

MgCO3

ZnCO3

Which of the following is not a naturally occurring dye.

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Indogo

Indigotin

Alizarin

Malachite green

The most electronegative element of the third period is.

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F

P

Br

Cl

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

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Kekule

Ladenburg

Faraday

Wohler

Which of the following solutions of sulphuric acid will exactly neutralize 25 mL. of 0.2 M NaOH

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12.5 mL of 0.1 M solution

24 mL OF 0.1 m Solution

50 mL of 0.1 M solution

None of the above

The most stable oxidation state shown by lead is.

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+2 , +4

+2 only

+3 , +4

+4 only

The nutrients which are required in very small amount for the normal growth of plants are called.

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Nitrogenous fertilizers

Micronutrients

Phosphorus fertilizer

All of the above

Among all halogens no oxyacid of the following is known

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F

Cl

Br

I

Which one of the following has the highest boiling point.

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H2O

H2S

H2Se

H2Te

If Steel is heated to a temperature well below red heat and to then cooled slowly the process is called.

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Annealing

Quenching

Tempering

Nitriding

An auxochrome is a group which

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Absorbs in UV region

Absorbs in visible region

Absorbs in IR region

Increase absorption wavelength of chromophore

Select an acidic amino acid

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Lysine

Cystine

Aspartic acid

Aminoacetic acid

Phenol on reaction with ethanoic anhydrides in the presence of sodium ethanoate gives.

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Phenyl benzoate

Ethyl benzoate

Phenyl ethanoate

Phenyl methyl ether

The second order rate constant can have units.

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dm-6 mol 2 s-1

dm3 mol s-1

dm³ mol^-1 s^-1

dm6 mol-1 s-1

In a system of designating wrought aluminum alloys. what does the second digit represents.

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The purity of aluminum

The identity of the alloy

The modification of the alloy group or impurity limits

None of above

The width of a carbon nano tube is.________ nm

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1

1.3

2.5

10

Elements in the same vertical group of the periodical have same

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Number of electron

Atomic number

Number of valence elections

Electronic configuration

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

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100%

90%

50%

70%

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