English Medium Class 10 - CBSE Question Bank Solutions for Science

Complete the following equation:

`CH_3 CH_2 OH` 

Write the chemical equation of the reaction which takes place during the burning of ethanol in air.

Why is ethanol used as a fuel?

How would you test for an alcohol?

Give the harmful effects of drinking alcohol.

How would you convert of thanol into ethene?

What would be observed on adding a 5% alkaline potassium permanganate solution drop by drop to some warm ethanol in a test-tube? Write the name of the compound formed during the chemical reaction. Also write chemical equation of the reaction which takes place.

Name the gas evolved when ethanol reacts with sodium.

What happens when ethanol reacts with ethanoic acid in the presence of a little of concentrated sulphuric acid? Write equation of the reaction involved.

What happens when ethanol is heated with concentrated sulphuric acid at 170°C? Write the equation of the reaction which takes place.

What happens when ethanol is oxidised with alkaline potassium permanganate (or acidified potassium dichromate)? Write the equation of the reaction involved.

Write names and formulae of hydrocarbons containing a single and a double bond (one example for each). Give one characteristic chemical property of each.

When ethanol is heated with concentrated sulphuric acid at 170°C, it gets converted into ethene. In this reaction, concentrated sulphuric acid acts as:
(a) oxidising agent
(b) catalyst
(c) dehydrating agent
(d) reducing agent

When ethanol reacts with sodium metal, it forms two products. These products are:
(a) sodium ethanaoate and oxygen
(b) sodium ethanaoate and hydrogen
(c) sodium ethoxide and oxygen
(d) sodium ethoxide and hydrogen

One of the following substances is not added to make denatured alcohol. This is:
(a) methyl alcohol
(b) copper sulphate
(c) chloroform
(d) pyridine

Which of the following can damage optic nerve leading to blindness, if taken internally?
(a) CH₃COOH
(b) C₂H₅OH
(c) NaHCO₃
(d) CH₃OH