Question # 1

The colloidal particles in raw water can be removed by

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Coagulation

Aeration

Chlorination

Hydration

The bond angle between any two SP²Hydridized orbitals is of

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180°

109.5°

120°

107.5°

Select from the following the one which is Alcohol

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CH₃CH₂OH

CH₃OCH₃

CH₃COOH

CH₃.CH₂.Br

Mark the correct statement.

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Na+ is smaller than Na atom

Na+ is large than Na atom

Cl- is smaller than Cl atom

cl- and Cl are equal in size

Which one of the following complexes is chelate.

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Potassium hexacyanoferrate (II)

Diammine silver (I) Chloride

Tetracarbonylnikel (0)

Sodium dioxalatoplatinate (II)

Chlomyl chloride test is used for the confirmation of

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Cl-

CO3^-2

NO3-

Cu2+

Conversion of phenol to benzene is known as.

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Oxidation

Reduction

Hydrolysis

Hydration

The percentage of clay and liem stone in cement is in the ratio of.

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1 : 1

1 :2

1:3

3:1

The benzene molecule contains.

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Three double bonds

Two double bonds

One double bonds

Delocalized sigma electron charge

Acetaldehyde react, with Grignard reagent to form

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Primary alcohol

Secondary alcohol

Ter alcohol

Carboxylic acids

Co-ordination number of Cu in

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Zero

Two

Four

Six

Which alkyl halide does not form Grignard's reagent.

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CH3-Br

CH3-Cl

CH3- F

CH3-I

Acetone reacts with HCN to form a cyanohydrin. It is an example of.

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Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

Total number of d-block elements are

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10

20

30

40

Which of the following noble gas is used for arc welding and cutting

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Helium

Argon

Xenon

Radon

Primary, Secondary and tertiary alcohols can be distinguish by.

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Iodoform test

Lucas test

Fehling solution

Ammoniacal silver nitrates

Which one of the following elements burns in air to form an oxide which, when shaken with water, give sa solution with a pH greater than 7.

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Carbon

Magnesium

sulphur

Hydrogen

Which one is a disaccharide

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Glucose

Sucrose

Fructose

Cellulose

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