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

Consider the following statements.
1. Methyl alcohol is also called wood spirit because in early stage it was prepared by the destructive distillation of wood.
2. Ethyl alcohol is also called grain alcohol because it is obtained by the starch enriched substance.
3. Rectified spirit is also called commercial alcohol.
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

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

What will be the % purity of a solute? \) × 100 b) % purity = \(\) × 100 c) % purity = \( \) × 100 d) % purity = \(\) × 100

A

% purity = \( \) × 100

B

\frac{\int_{t1}^{t2} CAdt}{\int_{t1}^{t2} CAdt + \int_{t1}^{t2} CBdt}

C

\frac{\int_{t1}^{t2} CAdt}{\int_{t1}^{t2} CAdt + \int_{t1}^{t2} CBdt}

D

\frac{\int_{t1}^{t2} CAdt}{\int_{t1}^{t2} CAdt + \int_{t1}^{t2} CBdt}

A car-wash can wash 8 cars in 18 minutes. At this rate, how many cars can the car-wash wash in 3 hours?

A

60 cars

B

80 cars

C

100 cars

D

144 cars

Fermentation of molasses to produce ethyl alcohol is done at __________ °C

A

20 - 30

B

100 - 150

C

250 - 300

Which of the following steps is not used in the fermentation of starch into ethyl alcohol?

A

Hydrolysis of starch into maltose by diastase present in barley

B

Conversion of maltose into glucose by maltase present in yeast

C

Conversion of glucose into ethanol by zymase present in yeast

D

Conversion of sucrose into glucose and fructose by sucrase present in yeast

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

A car-wash can wash 8 cars in 18 minutes. At this rate, how many cars can the car-wash in 3 hours ?

A

13

B

40.5

C

80

D

125

The process used for the manufacture of ethyl alcohol from molasses is

A

Distillation

B

Dehydration

C

Dehydrogenation

D

None of these

The fermentor used for the production of ethyl alcohol from molasses is made of

A

Wood

B

Concrete

C

Copper bearing steel

D

Procelain

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

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