Question # 1

Calcium acetate when dry distilled gives

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Formaldehyde

Acetaldehyde

Acetone

Acetic anhydride

The maximum number of electrons in a subshell for which / = 3 is

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14

10

8

4

In which molecule carbon atom is sp² hybridized

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CH₄

C₂H₄

C₂H₂

None of the above

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

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Flux

A reducing

Slag

An oxidizing agent.

Hess's law deals with

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Changes in heat or reaction

Rate of reaction

Equilibrium constant

Influence of pressure on volume of a gas

The ratio of close packed atoms to tetrahedral holes in cubic close packing is

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1 : 1

1 : 2

1 : 3

2 : 1

Hybridization explain the------- of orbitals

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Type of Bonding

Shapes

Shape and Type of bonding

None of above

Which is the most amphoteric?

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Na₂O

MgO

AI₂O₃

CaO

Which of the following process is used to separate insoluble particles from liquids?

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Separation

Filtration

Crystallization

Condensation

Bragg's law is given by equation

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n λ = 2 θ sin θ

n λ = 2 d sin θ

2nλ = d sin θ

nλ = 1/2 d sin θ

Alum is not used

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As a mordant in dyeing

As an insecticide

In purification of water

In tanning of leather

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