An element ‘X’ reacts with oxygen to form an oxide with the formula ‘X2O’. The oxide is soluble in water and turns red litmus blue. Identify whether ‘X’ is a metal or a non-metal. Justify your answer.

Which of these will change if the air in aclosed bottle is heated? abcdthe mass of the airthe composition of the airthe air pressure in the bottlethe number of air molecules in the bottle

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?

Which of the following are sources of revenue for media companies? a. direct sales to producers b. advertising and subscriptions c. online purchase d. capital investments