Question

(a) How would you test for an alcohol?
(b) Give the harmful effects of drinking alcohol.
(c) Explain why, methanol is much more dangerous to drink than ethanol.

Answer 1

Answer:

The presence of an alcohol can be determined with test reagents that react with the -OH group. The initial test to identify alcohols is to take the neutral liquid, free of water and add solid phosphorus(V) chloride. A a burst of acidic steamy hydrogen chloride fumes indicate the presence of an alcohol.

• Heavy drinkers are at risk of harmful, potentially life-threatening liver problems. ... It can also cause liver failure and type 2 diabetes. Other serious liver complications associated with prolonged and excessive alcohol consumption are alcoholic hepatitis, fibrosis and cirrhosis.
• Unlike ethanol, intake of methanol in very small quantities can cause death. It is oxidised to methanal in the liver which reacts rapidly with protoplasm and coagulates it. Methanol also affects the optic nerve, causing blindness.

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Answer 2

Explanation:

• (a) There are various methods for testing an alcohol. They are:
• Breath or Urine test: These tests need your urine or breathe to be tested.  
• Blood test: Blood is drawn from the body and the quantity of alcohol present is tested.  
• All the above said tests have the same objective, which is measuring the amount of alcohol.  
• (b) The harmful effects caused by drinking alchol is Fatigue, Heart damage, Lung infection, Liver damage, Pancreas problems, Diabetes complication, Cancer problem, Diarrhea, Muscle aches Increased blood pressure and Nausea.
• (c) More than ethanol, methanol is much more dangerous to drink. A very little quantity of methanol consumption leads to death. Methanol gets oxidized to methanal. This coagulates with protoplasm rapidly. It may lead to blindness permanently.