Although metals form basic oxides. Which of the following metals form an amphoteric oxide?

Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?

The electronic configurations of three elements X, Y and Z are X — 2, 8; Y — 2, 8, 7 and Z — 2, 8, 2. Which of the following is correct?

Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?

Electrical wires have a coating of an insulting material. The material, generally used is