Complete the statements by filling in the blank with the correct word/s:
The reaction of coke with steam to give water gas is an example of an_______[exothermic/endothermic] reaction.

Complete the statements by filling in the blank with the correct word/s: The metal which reacts with steam and the reaction is reversible is _______[calcium/iron]

Complete the statements by filling in the blank with the correct word/s: Decomposition of silver salts in the presence of sunlight is an example of __________[double decomposition/photochemical decomposition]

Complete the statements by filling in the blank with the correct word/s: The element molybdenum used in the reaction of nitrogen with hydrogen at elevated temperatures is an example of a ____________[promoter/catalyst].

Complete the statements by filling the blanks with the correct word from the bracket. The ratio of hydrogen & oxygen in water is……….[2:1/1:2]

Complete the statements given below by filling in the blank with the correct words. The basic unit of an element is a/an__________[molecule/atom/ion]

Give an example of an endothermic reaction.

Complete the statements by filling the blanks with the correct word from the bracket. Kerosene & water form a………...(miscible/immiscible) mixture.

Complete the statements given below by filling in the blank with the correct words. The formula of silver [I] chloride is __________ [AgCl//AgCl_(2)]

Complete the statements by filling in the blank with the correct word/s: Direct combination reaction of phosphorus pentoxide with water gives__________ [H_(3)PO_(3)//H_(3)PO_(4)]

Complete the statements by filling the blanks with the correct word from the bracket. Sodium oxide combines with carbon dioxide to give…… (sodium carbonate/sodium bicarbonate).