Question # 1

For each value of l. the number of m velocity are.

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n²

2l

(2l+1)

(n+1)

In Nano synthesis new unsual chemical reactions are due to.

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Non equilibrium system

Equilibrium system

Isothermal system

Adiabatic process

What of the following is not a Lewis base.

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CN-

AlCl3

NH3

ROH

Among the elements A, B,C and D having atomic numbers 7,8,9 AND 12 Respectively, the element with smallest size and highest IE is.

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A

B

C

D

In sodium chloride type lattice, the ratio of coordination number of cation to anion is.

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6:6

7:7

4:8

4:4

The sugar present in RNA is

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D- ribose

D-Arabinose

D-Glucose

Deoxyribose

Which of the following is not an ore of iron.

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Haematite

Magnetite

Siderite

Monazite

Temporary hard water is softened on industrial scale by adding.

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Mg(OH)2

Ca(OH)2

KOH

NaOH

Monomer of natural rubber is

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1,3-Butadiene

2-Methyl -1,3-butadiene

1,2 -Butadiene

1,3 - Pentadiene

Which of the following potassium fertilizers are more useful for horticultural crops tobacco and potatatoes.

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KNO3

KCl

HNO3

H2SO4

Any substance which has solidified from the liquid state with crystallization is known as

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Steel

Fibre

Glass

Asbestos

Bromination of n-butane produces.

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I-bromobutane as the major product

2- bromobutane as the major product

Both I - bromo and 2- bromobutane with equal percentage

Both i-bromo and 2-bromo products whose percentage depends upon temperature.

Which of the following compounds combines with hemoglobin.

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CO2

CO

NO

N2

The number of significance figures in the number 80.7 is.

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1

2

3

4

Which of the following statements are correct for Linear polymers.

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Linear polymers may be condensation as well as addition polymers

Structure is well packed in nature

Linear polymers have higher density higher melting point and higher tensile strength

All are correct

The ions Sc3+ , Ca2+ and K+ have same electronic configuration as that of.

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Neon

Argon

Krypton

Xenon

The silicate chains are present in

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Silica

asbestos

Beryl

Clays

Electron gas theory is able to explain

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Metallic lusture and optical properties

Malleability and ductility

High electrical and thermal conductivity

All of the above

Which of the following compounds cannot be a monomer.

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CH3-CHOOH -CH2OH

NH2 -CH2-NH2

CH3-CH2-NH3

NH2-CH2-CH-CH2 -NH2

CH3

Which of the following is not a characteristic of dye.

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It must have suitable colour

It must be able to fix to fibre

It must be fast to wash and lights

It must be highly soluble in water

The most stable oxidation state of chromium is.

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+6

+3

+4

+2

How many varieties of commercial iron are known.

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1

2

4

3

Hydrolytic reaction of fat with caustic soda is known as ______

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Esterification

Saponification

Acetylation

Carboxylation

Which one of the following woul dmake an S_N2 mechanism more likely

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Bulky substituents near the halogen

A polar solvent

A tertiary carbocation intermediate

A reactive nucleophile

Aromatic amine (X) was treated with alcoholic potash and another compound (Y) when foul smelling gas was formed with formula C2H3N (Y) was formed by reacting a compound (Z) with Cl2 in the presence of slaked lime . The compound (Z) is

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C6H5NC

CHCl3

CH3CH2OH

C6H5NH2

Which of the following detector is used for compounds containing electronegative atoms.

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Mass specdtrometer

ECD

TCD

UV-detector

The maximum noise level at which a man can work for 8 hours is.

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80 dB

70 dB

90 dB

60 dB

Aluminium does not corrode as does iron because.

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AI does not react with O2

a-protective layer of Al2O3 forms on the metal surface

AI is harder to oxidize than is Fe

Fe gives chathodic protection to AI

In each period the most electro negative element belongs to.

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^{Group -1}

Group -17

Group -2

Group -18

Which of the following carbonates decomposes at the highest temperature.

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Mg CO3

CaCO3

Sr CO3

Ba CO3

When metal orbital are rotated in octahedral field the following representation obtained.

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t2 g + lg

a1 g

t 1 u

All above

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