Industrial Preparation of Ethanol

Q. Heating ethanol with excess concentrated sulphuric acid gives ______.

1. butane
2. ethene
3. propyne
4. methane

Q. What is meant by absolute alcohol

Q.

Explain some uses of ethanol in our daily life.

Q.

Choose the option representing the correct percentage content of ethanol in its different types.

1. Wash- 9%, Rectified spirit- 99.5%, Absolute alcohol- 95.6%

2. Wash- 99.5%, Rectified spirit- 9%, Absolute alcohol- 95.6%

3. Wash- 9%, Rectified spirit- 95.6%, Absolute alcohol- 99.5%

4. Wash- 99.5%, Rectified spirit- 19%, Absolute alcohol- 39.6%

Q. Which enzyme of yeast cells catalyzes the fermentation of sugar ?

1. Zymase
2. Invertase
3. Cellulose
4. All of the above

Q. Write the composition of the following:
(i) methylated spirit
(ii) power alcohol
(iii) spurious alcohol

Q.

Write the chemical formula and name of the compound which is the active ingredient of all alcoholic drinks. List its two uses.

Q.

Methanol is added into ethanol to

1. increase its concentration

2. prevent its use as a beverage

3. add taste

4. reduce its odour

Q.

Choose the incorrect statement regarding ethanol from the options given below.

1. 99.5% pure ethanol is known as power alcohol.

2. 95.6% strong ethanol is known as rectified spirit.

3. Methanol is added to ethanol to prevent its use as beverage.

4. Ethanol is often manufactured from starchy substances.

Q.

Zymase present in bacteria converts the glucose into ethanol.

1. True

2. False

Q. Which among the following can be used for converting ethanol to denatured spirit?

1. ethene
2. ethyne
3. methanol
4. methane

Q.

Ethanol is:

1. No effect

2. Immiscible in water

3. Miscible in water

4. Insoluble in water

Q.

Match the following compounds with their usage

$\begin{array}{cc}\text{Usage}& \text{Organic Compound}\\ \text{(i) Silk industry}& \text{(a) Power alcohol}\\ \text{(ii) Inner surface of cookware}& \text{(b) Teflon}\\ \text{(iii) Solvent in paint industry}& \text{(c) Methanol}\\ \text{(iv) Fuel in motor vehicles}& \text{(d) Ethanoic acid}\end{array}$

1. (i)- a, (ii)- b (iii)- c and (iv)- a

2. (i)- d, (ii)- b (iii)- c and (iv)- a

3. (i)- b, (ii)- c (iii)- d and (iv)- a

4. (i)- b, (ii)- c (iii)- a and (iv)- d

Q.

what is denatured alcohol??

Q. Ethanol is colourless.

1. True
2. False

Q. Which of the following statement regarding ethanol is incorrect?

1. Drinking excess ethanol can cause social problems.
2. Ethanol has medical significance.
3. Drinking ethanol improves liver functioning.
4. Drinking ethanol increases the mind concentration.

Q.

Methanol is added into ethanol to

1. increase its concentration

2. prevent its use as a beverage

3. add taste

4. reduce its odour

Q. Choose the correct pair of ethanol derivative and the percentage of ethanol present in it.

1. 85%
2. 99%
3. 95%
4. Denatured spirit
5. Absolute alcohol
6. Rectified spirit

Q.

name two substance in which ehtanol is an important constituent

Q.

Which enzyme plays an important role in converting glucose into ethanol?

1. Amylase
2. Insulin
3. Zymase
4. Invertase

Q. What is mixed with ethanol to make it spurious