Which of the following statements are correct? i) Ordinary ethyl alcohol is known as grain alcohol. ii) Methylated spirit contains rectified spirit. iii) Absolute alcohol is 100% ethanol. iv) Rectified spirit is 100% ethanol.
ii, iii, iv
ii, iii
i, ii, iii
All are correct
A
ii, iii, iv
B
ii, iii
C
i, ii, iii
D
All are correct
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Solution
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i. Ordinary ethanol is called grain alcohol is a true factual statement. ii. Methylated spirit contains 85-90% rectified spirit and 10-15% methanol. iii. Absolute or anhydrous alcohol refers to ethanol with a low water content. There are various grades with maximum water contents ranging from 1% to a few parts per million (ppm) levels. iv. Rectified spirit is an azeotropic composition of 96% ethanol containing 4% water.
Option C is correct.
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