Question # 1

Which of the following imparts violet colouration to the non-luiminous flame of Bunsen burner?

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NaCI

BaCI₂

CaCI₂

KCI

Which one is the property of an ideal solvent

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Should be expensive

It should react chemically with the solute

Impurities should crystallize along with the solute

Should be safe to use

Which of the following units represents largest amount of energy?

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Calorie

Joule

Erg

Electron vol.

Leblanc process is employed in the manufacture of

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Baking soda

Washing soda

Potash

Plaster of paris

Among the alkaline earth metals the element forming predominantly covalent compounds is

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Be

Mg

Sr

Calcium

Dilute hydrochloric acid solution cannot be concentrated by boiling beyond

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11%

33%

44%

22%

Reaction of ethylamine with chloroform in alcoholic KOH producers

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CH₃OH

CH₃NC

C₂H₅NC

C₂H₅CN

The last orbit of argon would have electrons

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8

18

2

6

A clathrate may be defined as a

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Cage compound

Liquid crystal

Mixture

Solid solution

For the carbylamine reaction we need hot alc.KOH and

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Any amin and chloroform

Chloroform and Ag powder

A primary amine and chloroform

A mono alkyl amine and trichlorom-ethane

Covalent compounds are soluble in

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Polar solvents

Non-polar solvents

Concentrated acids

All solvents

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