(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

How can 68% nitric acid be concentrated to 98% nitric acid?

Give three equations of the reaction to prove that nitric acid is an acid.

Which was the first organic compound synthesized in laboratory and by whom?

Write the molecular formulae of the third and fifth members of homologous series represented by general formula C_nH_2n-2.

Which of the following belong to same homologous series?

C3H₈, C₃H₆, C₄H₈, C₄H₆

How many isomers of the following hydrocarbons are possible?

(a) C₃H₈ 

(b) C₄H₁₀

Explain with the help of a balanced equation, the brown ring test for nitric acid.

What is major source of organic compounds?

Why is freshly prepared ferrous sulphate solution used in the ring test?

Give four differences between organic and inorganic cornpounds.

Brown ring disappear if the test tube is disturbed.

Fill in the blank:

Organic compounds are essentially_________compounds. They
show ___________Reaction and their rates are ___________.

Fill in the blank:

One of the products of combustion of organic compounds is
always__________

Fill in the blank:

More than 90% of the known organic compounds are. ________

Fill in the blank:

Vital force theory was discarded by the synthesis of__________ in laboratory.

Give reason for the following:
In laboratory preparation of nitric acid all the apparatus including cork should be made up of glass.

Explain the fact that why organic com pounds are Iarge in number.

What is homologous series?

Give reason for the following:
Commercial nitric acid is yellow in colour, but when it is diluted with water, it turns colourless.

Give reason for the following:
Aluminum does not react with nitric acid of any concentration.