Question # 1

The bond angles in methane CH₄are equal to

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109.5°

107.5°

104.5°

120°

Which one of the following elements is not present in all proteins

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Carbon

Hydrogen

Nitrogen

Sulphur

Carboxylic acid can generally be prepared by various methods. Which of the following methods is not suitable for making carboxylic acids

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By the oxidation of primary alcohols

By the hydrolysis of nitriles

By the carbonation of Grignard, reagent

By the hydrolysis of p-amines

Rate of chemical reaction depends upon :

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The number of total collisions per second.

Number of molecules taking part in a chemical reaction.

Number of fruitful collisions per second

Number of fruitless collisions per second.

The acid present in vinegar is

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CH₃COOH

HCI

H₂SO₄

HCOOH

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There is no change in temperature

No change in volume

Heat is absorbed

Heat is released

The process in which solvent particles surround solute particles is called

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Hydrolysis

Hydration

Solvation

Dissolution

Which woody raw material is used of the manufacture of paper pulp

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Cotton

Bagasse

Poplar

Rice straw

What is the name of the comlex [Ni(CO)₄]

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Tetracarbonylnickel (o)

Tetracabonylnickel

Tetracabonylnickel (II)

Tetracabonylnickel (IV)

Out of 110 known elements, transition elements are

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40

60

50

80

How many zones through which the charge passes in a rotary kiln

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4

3

2

5

The bond length b/w atoms of hydrogen in the hydrogen molecules is:

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7.54 nm.

0.0754 nm.

0.754 nm.

0.00754 nm.

Turnbull's blue is a compound called?

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Ferricyanide

Ferrous ferricyanide

Ferrous cyanide

Ferri - Ferro cyanide

Dehydration of allcohol gives:

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Alkane

Alkene

Aldehyde

ketone

The mass of the neutron is of the order of

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10^-23kg

10^-24kg

10^-26kg

10^-27kg

B-B'-dichloroethyl sulphide is commonly known as

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Mustard gas

Laughing gas

Phosgene gas

Bio gas

Which of the following elements is not stable:

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Xe

Ar.

Kr.

Li.

Tertiary alkyl halides are practically inert to substitution by S_N2 mechanism because of

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Onsolubility

Instability

Inductive effect

Steric hindrance

By simply reacting Grignand's reagent with water we get

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An alkane

Higher alkane

An alkene

An alkyne

The open chain compounds are also called

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Aliphatic

Alicylic

Aromatic

Both a and b

Which of the following elements is not present in all proteins?

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Carbon

Hydrogen

Nitrogen

Sulphur

Osmotic pressure of a solution increases by

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Decreasing the temperature

Increasing the volume

Increasing the number of molecules of the solute

None of the above

Fungicides are the pesticides which

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Control the growth of fungus

Kill insects

Kill plants

Kill herbs

[Zn(NH₃)₄]³⁺possess geometry

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Square plannar

Hexagonal

Tetrahedral

None of these

On heating glycerol with conc. Sulphuric acid a compound with unpleasant odour is obtained. The compound is

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Methyl alcohol

Formic acid

Prop-2-enal

Glycerol sulphate

Which inorganic precipitate acts as semipermeable membrane?

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Calcium sulphate

Barium oxalate

Nickel phosphate

Copper ferrocyanide

What is the nature of Al₂O₃

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Acidic

Basic

Amphoteric

Neutral

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Q and R Q and R

R only Q and R

Q and R R only

Q only R only

Which gas is used for welding purposes

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Butane

Nitrogen

Methane

Acetylene

The oxide of beryllium is

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Acidic

Amphoteric

Superoxide

Basic

10 ml of 1.5 M NaOH solution is neutralized by 20 ml of a-M HCl solution. The value of 'a' will be

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1.0

0.75

0.5

0.25

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