An element 'X' burns in oxygen to form an electrovalent compound XO. State the compounds you expect it will form if the element X is made to combine with (i) chlorine and (ii) sulphur. Mention the chemical formula and nature of bond present in each case.

An element X reacts with chlorine to form a compound of formula XCl_(2) . Write the formulae of compounds which you expect to be formed when the element X combines with oxygen.

An element 'X' (Z=12) combines with element 'Y' (Z=17) to form an electrovalently bonded compound. Which of the following is FALSE for the formed compound?

An element X (atomic number 17) combines with an element. Y (atomic number 20) to form a compound. (i) Write the positions of these elements in the modern periodic table. (ii) Write the formula of the compound formed. Justify your answer in each case.

An element X of valency 3 conbines with another element Y of valency 2. What will be the formula of the compound formed ?

Which of the following elements will form a compound with oxygen in which one atom of the element is combined with one atom of oxygen to form an oxide of formula MO ?

A magnesium ribbon is burnt in oxygen to give a white compound X accompanied by emission of light. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound Y. (a) Write the chemical formulae of X and Y. (b) Write a balanced chemical equation, when X is dissolved in water.

An element X has a valency of 4 whereas another element Y has a valency of 1. What will be the formula of the compound formed between X and Y ?

The valency of an element X is 1 and that of oxygen is 2. What will be the formula of the compound formed by the combination of element X with oxygen ?