Question: Which of the scientist were able to prove that atom is no longer non-divisible?

• a) Michael Faraday
• b) Chadwick
• c) Dalton
• d) Thomson

Answer: Michael Faraday

Question: The attractive force which holds various constituents (atoms, ions etc.) together in different chemical species is called a

• a) chemical bond
• b) ionic bond
• c) chemical compound
• d) covalent bond

Answer: chemical bond

Question: Thermodynamics is not concerned about

• a) the rate at which a reaction proceeds
• b) the feasibility of a chemical reaction
• c) the extent to which a chemical reaction proceeds
• d) energy changes involved in a chemical reaction

Answer: the rate at which a reaction proceeds

Question: Which of the following process takes place in oxidation process?

• a) Addition of oxygen
• b) Addition of hydrogen
• c) Addition of chlorine
• d) Removal of oxygen

Answer: Addition of oxygen

Question :  Group 2 elements are called alkaline earth metals why? Choose the correct reason(s).

(i) Hydroxides formed by group 2 elements are alkaline in nature.
(ii) Their metal oxides are found in the earth’s crust.
(iii) Their oxides are alkaline in nature
(iv) Group 2 elements react with alkalies