Metals And Non Metals Mock Tests

Which of the following is the correct order of reactivity of metals?

A student adds sodium hydroxide solution to an unknown salt and observes a white precipitate that is insoluble in excess of sodium hydroxide but soluble in ammonium hydroxide forming a deep blue complex. Which metal ion is present in the salt?

Which of the following metals is refined by the electrolytic refining method?

An element A forms an oxide with the formula A₂O₃. This element is likely to be:

Which metal is liquid at room temperature?

When sodium metal is exposed to air, it reacts rapidly with oxygen to form:

Which of the following is the correct order of reactivity of metals?

When iron nails are placed in copper sulphate solution for about 30 minutes, which observation is made?