Question # 1

ΔH_{neutralisation}is always

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positive

Negative

Zero

Positive or negative

Which of the following elements is most electronegative?

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Oxygen

Chlorine

Nitrogen

Fuorine

Which of the following compounds has the lowest anion to cation size ratio?

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LiF

NaF

Csl

CsF

Bell metal is an alloy of

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Cu, Zn and Sn

Cu, Zn and Ni

Cu and Zn

Cu and Sn

The principal constituent of pyrex glass

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Zn

B

Pb

Cl

Heating a mixture of sodium benzoate and soda lime gives

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Methane

Benzene

Sodium benzoate

Calcium benzoate

Each of following is true of white and red phosphours except that they

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Are both soluble in CS₂

Can be oxidized by heating in air

Consist of the same kind of atoms

Can be converted into one another

Covalent compounds are soluble in

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Polar solvents

Non-polar solvents

Concentrated acids

All solvents

Hypo is used to photography for

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Developing picture

Picture printed

The colour of picture

The fixation of picture

The osmotic pressure of solution increases if

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Temperature is decreased

Solution constant is increased

Number of solute molecules are increased

Volume is increased

The main structure features of proteins is

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An ester linkage

An ether linkage

The peptide linkage

All

A clathrate may be defined as a

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Cage compound

Liquid crystal

Mixture

Solid solution

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

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Flux

A reducing agent

Slag

An oxidizing agent

Which of the following nitrogen fertilizer contain more nitrogen

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NaNO₃

KNO₃

NH₄NO₃

Urea

The number of unpaired electrons in the p-subshell of oxygen atom

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1

2

3

4

Which one is primary alcohol?

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Buten-2-ol

Propan-2-ol

Butaon-1-ol

2, 3-Dimethylhexane-4-ol

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