Consider the following statements.<br>1. Methyl alcohol is also called wood spirit because in early stage it was prepared by the destructive distillation of wood.<br>2. Ethyl alcohol is also called grain alcohol because it is obtained by the starch enriched substance.<br>3. Rectified spirit is also called commercial alcohol.<br>Which of the statements given above are correct?

In what ratio should a 20% methyl alcohol solution be mixed with a 50% methyl alcohol solution so that the resultant solution has 40% methyl alcohol in it?

A

1 : 2

B

2 : 1

C

1 : 3

D

3 : 1

15% pure ethyl alcohol (wash) on fractional distillation gives 95% ethyl alcohol by weight which is commonly known as which of the following terms?

A

Wash

B

Absolute alcohol

C

Rectified spirit

D

Methylated spirit

Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the

A

Decolourisation of sugar

B

Solvent recovery from air and gases

C

Absorption of gases and vapor

D

Electrode manufacture

Consider the following statements.
1. Dynamite is prepared by mixing nitroglycerine with saw dust and ammonium nitrate.
2. Liquor poisoning is due to the presence of methyl alcohol.
3. Ethanol is generally present in tonics.
Which of the above are correct?

A

1 and 2

B

1 and 3

C

2 and 3

D

1, 2 and 3

Consider the following statements.
1. Carbon black is obtained when methane is heated in absence of air.
2. Kerosene is a mixture of alphatic hydrocarbons.
3. Most of hydrocarbons from petroleum are obtained by fractional distillation.
Which of the statements given above are correct?

A

1 and 2

B

1 and 3

C

2 and 3

D

1, 2 and 3

Ethyl alcohol obtained by fermentation of starch or molasses is called wash, and what is it’s purity?

A

15%

B

99%

C

99.9%

D

95%

The molecular masses of methyl alcohol and ethyl alcohol differ from . . . . . . . . units.

A

14

B

13

C

12

D

16

Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the

A

Elimination of solvent drying facility

B

Higher nitration temperature

C

Lower solvent dilution ratio

D

All of the above

Which of the following statements is incorrect regarding preparation of alcohols? give primary alcohol and secondary alcohol respectively b) Ketones on reaction with Grignard’s reagent gives tertiary alcohol c) Aldehydes on reaction with Grignard’s reagent gives primary or secondary alcohol d) Alkyl halides on reaction alcoholic potash gives alcohol

A

Aldehydes and Ketones on catalytic reduction by give primary alcohol and secondary alcohol respectively

B

H

C

H

D

H

Consider the following statements.
1. Maize is a rainfed crop.
2. Maize is mainly used in starch, glucose and soft drinks.
Which of the statements given above is/are correct?

A

Only 1

B

Only 2

C

Both 1 and 2

D

Neither 1 nor 2