Question # 1

Which of the following reactions does not involve formation of carbocation?

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SN1 and E1

El and E2

SN1 and SN2

E2 and SN2

The reaction takes place among the molecules when they have:

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Activation energy

Properly oriented

Concentrated

Activation energy and proper orientation

The scope of environmental chemistry is to study:

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Source of chemicals

Transportation of chemicals

Transportation of toxic chemical

All of these

Phosphoprotein comes under the type of proteins

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Simple protein

Derived protein

Conjugated

Both A & B

A reaction A- B is independent of concentration of reactant A. The order of reaction will be

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First order

Second order

Third order

Zero order

Which of the following gas will have lowest rate of diffusion

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CH₄

N₂

NH₃

CO₂

The rigid rocky part of earth crust called lithosphere extends upto a depth of:

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10 km

100 km

1000 km

1500 km

Adipic acid and Hexamethylenediammine polymerize to give

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Acrylic resins

Plastic fiber

Nylon-6, 6

None

How many allotropic forms are present in carbon?

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Two

Four

Three

Five

The oxidation state of transition elements is usually

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Variable

Single

Constant

Infinite

Lactic acid is buffered by

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L. Carnosine

Glutathione

Casenogin

Dopa

The order of frequency of the following radiations unltraviolet, visible, infrared and microwave is

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Microwave > infrared > visible > ultraviolet

Visible > ultraviolet > microwave > infrared

Ultraviolet > visible > infrared > microwave

Infrared > microwave > ultraviolet > visible

Ammonium nitrate fertilizer is not used for which crop

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Cotton

Wheat

Sugar cane

Paddy rice

Which of the following acts as ligand

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NH₃

NH₂-- CH₂-- CH₂-- NH₂

C₂O^2-₄

All these

The colour of transition metal complexes is due to

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d-d transitions of electrons

Para magnetic nature of transition elements

Ionization

Loss of s-electrons

When ethyl iodide and n-propyl iodide are allowed to react with sodium metal in ether, the number of alkanes that could be produced is

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Only one

Two alkanes

Three alkanes

Four alkanes

Alkynes normally have ______ hybridization

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Sp

Sp²

SP³

d sp³

Which bond is most stable

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C - Cl

C - F

C - Br

C - I

For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to

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Hydrolysis

Oxidation

Hydrogenation

Electrolysis

In primary alkyl halides, the halogen atom is attached to a carbon which attached to how many carbon atoms?

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Two

Three

One

Four

Chief ore of aluminium is:

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Na₃AIF₆

Al₂O₃.2H₂O

Al₂O₃

Al₂O₃ .H₂O

Precipitation will occur until the ionic product becomes

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Equal to K_sp

Lesser than K_sp

Greater than K_sp

None of these

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