Question # 1

Ozone filters out radiation below.

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o

1000 A

o

2000 A

o

3000 A

o

4000 A

In urea the amount of nitrogen is

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82.0%

46.0%

33.0%

21.0%

Which trihalide is not hydrolysed by water

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NF3

NCl3

PCl3

AsCl3

The width of a carbon nano tube is.________ nm

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1

1.3

2.5

10

The principal ores of copper are

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Copper sulphides

Copper oxides

Both sulphides and oxides

Copper carbonate

Which of the following process is used for the conversion of matte is to nickel.

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Orford process

Mond's process

Electrolytio process

All

Which of the following statements regarding phenols is not correct.

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Phenol ls are stronger acids than water and alcohols.

Phenol are weaker acids than carboxylic acids

Phenol are solubel in both aqueous NaOH and aqueous sodium hydrogen carbonate

Phenoxides ions are more stable than the corresponding phenol

Which among the following elements has the highest value of IE.

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Mg

Na

Ca

Sr

A compound with an congruent melting point decomposes on heating into.

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A liquid of the same composition as the solid

A new solid phase and a solution with a compositional from that of the solid phase

A new solid phase and a solution with the same composition as that of the solid phase

A solution of fixed composition

Which of the following is not an androgen i.e. male sex hormones.

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Androsterone

Testosterone

Oestrone

All of these are make hormone

Which of the following elements would have the lowest first ionization energy

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Mg

Rb

Li

Ca

The green color of water in a lake is due to

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Excessive growth of sea weeds

Algae

Pollution

Grass

Copper is mainly extracted from witch of the following ore

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Sulphide ores

Carbonate ores

Oxides ores

Non sulphide ores

Identify an oxygenated cyclic terpenoid

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a- pinene

Camphor

Citral

Geranial

Which of the following molecules has the lowest average speed at 273 K.

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CO2

CO

CH4

O2

The maximum number of electrons in s,p,d and f sub shells are.

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2 in each

2, 6, 10, 18

2,6 ,10,14

5 in each

Which of the following technique describes titrations in which a standard iodine solution is need.

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Iodometry

Iodimetry

potentiometry

Argentometry

The most electronegative element of the third period is.

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F

P

Br

Cl

Commercial or the phosphoric acid is pure.

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37.0%

82.98%

88.25%

90.12%

Dolmite is a mineral whose formula is.

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CaCO3

Mg CO3

CaCO3, MgCO3

CaSO4

Which of the following will have the largest pH?

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O.1 N HCl

0.1 N CH3COOH

0.1 N NaOH

0.01 N NaOH

Arrange the hydrides of group 15 in the correct order of reducing nature.

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NH3 < PH3 < AsH3 < Sb H3 < BiH3

NH3 > PH3 >AsH3 >Sb H3 > BiH3

PH3 < AsH3 < SbH3 < BiH3 < NH3

PH3 > AsH3 > SbH3 > BiH3 > NH3

H2SO4 acts as gent

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Reducing

Oxidizing

Both A and B

None of above

Strong field ligands such as CN

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Usually produce high spin complexes and small crystal field splitting

Usually produce low spin complexes and small crystal field splitting

Usually produce low spin complexes and high crystal field splitting

Cannot form low spin complexes

Water that easily forms a lather of films and frotha when agitated with a soap solution called.

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Hard water

Heavy water

Soft water

Washing water

Dry distillation of amino acids with barium hydroxide yields.

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Acids

Amines

Alcohols

Hydroxy acids

The noble gas which was discovered first in the sun and then on the earth is.

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Helium

Neon

Argon

Xenon

The suffix '-ene' in the name of fullerene shows the presence of ___ in the molecule.

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One triple bond

One double bond

Two single bonds

Two triple bonds

Which pair of species can undergo chemical reaction with each other.

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CO+ NO

LiH and H2O

CO2 and HCl

CaH2 and SI H4

Opticla tweezers

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Are used to remove facial hair with miniaturized laser beams

use light to manipulate particles as small as single atom

Are a nanotechnology bases tool for stamp collectors

Don't exist

The correct order of reactivity among I , Ii, and III IS.

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i > ii >iii

i > iii > ii

II > III > I

III > II > I

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