Which of the following reacts with cold water vigorously?
A. carbon

B. sodium

C. magnesium

D. sulphur

Distinguish between metals and non-metals on the basis of their chemical properties.

The least reactive metal among the following is:

The element Z burns in air to form an oxide. The aqueous solution of this oxide turns blue litmus to red. The element Z is most likely to be:

Which of the following reactions will not occur? Why not?

(a) Zinc sulphate + Copper Copper Sulphate + zinc

(b) Copper Sulphate + Iron iron Sulphate + copper

Which among the following is the most reactive metal?

When a vessel is exposed to moist air for a long time, then a green coating is formed on its surface. The vessel must be made of:

You are given a solution of iron sulphate. Which of the following do you think cannot displace iron from iron sulphate?

Which of the following elements will produce an oxide that will dissolve in water to form an acid?

An element burns in air to form an oxide. The aqueous solution of this oxide turns blue litmus paper red. State whether the element is a metal or nonmetal. Name one such element.

The metal X reacts with dilute hydrochloric acid to form a gas Y. The metal X also reacts with sodium hydroxide solution (on heating) to form the same gas Y. When a lighted matchstick is applied, this gas burns by producing a ‘pop’ sound.

(a) name two metals which could behave like X

(b) Name the gas Y