Metals and Non-...

Generally metals reacts with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except $$Mn$$ and $$Mg$$)?

Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?

The metal which produces hydrogen gas on reaction with dilute hydrochloric acid as well as sodium hydroxides solution is 

Materials that can be drawn into wires are called ductile. Which of the following is not ductile material?

Which one of the following metal do not react with cold or hot water?

Which one of the following figures correctly describes the process of electrolytic refining?

During electrolytic refining of zinc, it gets

If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of

Which one of the following forms a brown flaky coat when exposed to air?

Reacting with water, a metal produces