Metals and Non-Metals — Science STD 10 — Question

Which of the following hydrocarbons will give substitution reactions and why?
CH_4, C₃H₆, C₃H₈, C₄H₆, C₅H₁₂, C₅H₁₀.

Explain why, the first period of the modern periodic table has only two elements whereas second period has eight elements.

Express the following facts in the form of a balanced chemical equation:

“When a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed”.

Describe how sodium hydrogencarbonate (baking soda) is produced on a large scale. Write equation of the reaction involved.

Why have detergents replaced soap as a washing agent?

A compound ‘X’ on heating with excess conc. sulphuric acid at 443K gives an unsaturated compound ‘Y’. ‘X’ also reacts with sodium metal to evolve a colourless gas ‘Z’. Identify ‘X’, ‘Y’ and ‘Z’. Write the equation of the chemical reaction of formation of ‘Y’ and also write the role of sulphuric acid in the reaction.

Friedrich Wohler converted an inorganic compound into an organic compound in the laboratory.

1. Give the name and formula of inorganic compound.
2. Write the name and formula of organic compound formed.

Give the molecular formula of one homologue of each of the following:

1. C₃H₆
2. C₂H₆
3. C₂H₂

Why is the conversion of ethanol into ethanoic acid an oxidation reaction?