Draw the electron dot diagram of Hydionium ion (H = 1; O = 8)

In Period 3 of the Periodic Table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the brackets to complete the following statements:
(i) The element B would have (lower / higher) metallic character than A.
(ii) The element A would probably have (lesser / higher) electron affinity than B.
(iii) The element A would have (greater / smaller) atomic size than B.

Copy and complete the following table which refers to the conversion of ions to neutral particles.

Complete the following table which relates to the homologous series of hydrocarbons.

45.

Name the most common ore of the metal aluminium from which the metal is extracted. Write the chemical formula of the ore.

Name the process by which impure ore of aluminium gets purified by using a concentrated solution of an alkali.

Write the equation for the formation of aluminium at the cathode during the electrolysis of alumina.

Write the balanced chemical equation to prepare ammonia gas in the laboratory by using an alkali.

State why concentrated sulphuric acid is not used for drying ammonia gas.

Why is ammonia gas not collected over water?