Question # 1

Number of electrons involved in d-d transition of [Ti(H2O)6]+3

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1

3

2

4

Silk is the example of:

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mineral fiber

vegetable fiber

animal fiber

none of above

Compared with alkaline earth metals, the alkali metals exhibit.

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lower ionization energies

greater hardness

high boiling point

smaller ionic radii

In van der Waal's equation of state of the gas law,the constant 'b' is measure of

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Intermolecular repulsions

Intermolecular collisions per unit volume

Volume occupied by the molecules

Intermolecular attraction

Proteins have linkage between amino acids

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imide

amide

ester

ether

The pH range of acid rain is?

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7-6.5

6.5-6

6-5.6

Less than 5

Molar mass of formic acid in benzene comes out to be

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64

46

32

92

Polyesters resins have special use in:

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Clothing

Paints

Emulsion

Floor covering

All are examples of different classes of enzymes except

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Hydrolases

Isomerases

Oxido-reductases

Mutases

The elements of group I-A react violently with water and make the solution

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neutral

amphoteric

acidic

alkaline

A term to express the partial pressure of water vapours in a gas is known as

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vapour pressure

aqueous tension

partial pressure

moisture

Which statement explains the observation that magnesium hydroxide dissolve in aqueous ammonium chloride, but not in aqueous sodium chloride

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The ionic radius of the NH₄⁺ion is similar to that of Mg²⁺but not that of Na⁺

NH₄Cl dissociates less fully than NaCl

The ions Na⁺and Mg²⁺are isoelectronic (have the same number of electrons)

The ion NH⁺₄acts as an acid

In the manufacture of iron from haematitie,limestone is added to act as

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Flux

A reducing agent

Slag

An oxidizing agent

Which of the following statements is no correct regarding bonding molecular orbitals?

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Bonding molecular orbitals possess ls energy than atomic orbitals from which they are formed.

Bonding molecular orbitals have low electron density between the two nuclei.

Every electron in bonding molecular orbitals contributes to the attraction b.w atoms.

Bonding molecular orbitals are formed when the electron waves undergo constructive interference.

Which of the hydrogen halides has the highest percentage of ionic character

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HCl

HBr

HF

HI

The limiting line of Blamer series in hydrogen spectrum lies in

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Visible regions

Ultraviolet region

Infrared region

x-rays region

Which of the following was discovered first:

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Charge to mass ratio of electrons.

Mass of electrons.

Charge of electrons.

All of above at same time.

Depletion of ozone is more during the month:

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Jan - March

April - Ju8n

July - Aug

Sept - Nov

Which three elements are needed for the healthy growth of plants?

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N,S,P

N,Ca, P

N,P,K

N,K,C

Acidification of the soils due to addition of synthetic nitrogen fertilizer, is corrected by using

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Gypsum

Sodium nitrate

Limestone

Potassium nitrate

Write the name of following compound

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5 - methyle - 2- hexene

2 - methyle hexene

4 - ethyle - 2 - methyle hexene

3 - ethyle - 3 - methyl hexene

The saturated hydrocarbons usually end with suffix ______

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Ane

Ene

Yne

Oic

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