Ethyl alcohol is made unfit for drinking by the addition of the following :
Correct Answer:
(B) Methanol and Pyridine
Ethyl alcohol becomes poisonous by the addition of methanol and pyridine.
Ques: 2
The off ending substance in the liquor tragedies leading to blindness etc. is –
Correct Answer:
(D)
Methyl alcohol
Methyl alcohol is a colourless liquid. It is soluble in water. Its smell is like a pungent, unpleasant and intensive flavour. In each ratio, it is poisonous while in excess, the intake of methyl alcohol results in madness, blindness and its excess consumption can also cause death.
Ques: 3
Which one of the following is also known as 'wood spirit'?
Correct Answer:
(A) Methyl alcohol
Methyl alcohol (CH3OH) is also called wood spirit. It is obtained by the destructive distillation of wood.
Ques: 4
Fermentation of sugar leads to –
Correct Answer:
(A) Ethyl alcohol
Ethyl alcohol is formed by the fermentation of sugar, which is made of glucose and fructose.
Ques: 5
Glucose is converted to ethyl alcohol by the enzyme
Correct Answer:
(C) zymase
Glucose is converted to ethyl alcohol (ethanol) by the enzyme zymase. Zymase catalyzes the fermentation of sugar (glucose and fructose) into ethanol and carbon dioxide. This enzyme complex naturally occurs in yeast and other anaerobic organisms. This enzyme is used in the preparation of ethanol and alcoholic beverages commercially. Invertase enzyme converts sucrose (cane sugar) into glucose and fructose. Maltase enzyme converts maltose into glucose while diastase enzyme converts starch into maltose.
Ques: 6
To whom molasses are excellent raw material for production?
Correct Answer:
(C) Alcohol
Wine is an alcoholic beverage, which is prepared by fermentation of different substances. The percentage of alcohol also varies in it. Beer, Champagne, Cider, Port and Sherry, Brandy, Whisky, Rum, Gin etc. are some types of alcohol. The beer has the lowest amount of alcohol in it and rum has the highest.
S. No. Name Alcohol Raw Material
1. Rum 45 to 55% Molasses
2. Brandy 40 to 50% Grapes
3. Whisky 40 to 50% Barley, Corn
4. Beer 3 to 6% Barley
5. Champagne 10 to 15% Grapes
6. Cider 2 to 6% Apple
Ques: 7
Alcohol that is derived from fermentation of germinated barley grains is known as:
Correct Answer:
(A) Beer
Beer is usually derived from the fermentation of malt derived from the digestion of germinated barley grains. Barley, water, hops and yeast are the four magic ingredients that are required for making beer. Other grains like maize, rice, rye and wheat are also used in making beer. Whisky is also made from fermented barley grains.
Ques: 8
The breath test conducted by police to check drunken driver has which one of the following on the filter paper?
Correct Answer:
(A) Potassium dichromate-sulfuric acid
The breath test conducted by police to check drunken driver through old breathalyzer has potassium dichromate-sulfuric acid on the filter paper. When alcohol vapour makes contact with the orange dichromate coated crystals, the colour changes from orange to green due to oxidation of alcohol into acetic acid. The degree of the colour changes is directly related to alcohol level in the breath.