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Metals and Non-metals

An element forms an oxide A2O3 which is acidic in nature. Identify A as a metal or non-metal.

06/11/2024

Science

10th

Metals and Non-metals

A metal M does not liberate hydrogen from acids but reacts with oxygen to give a black colour product. Identify M and black coloured product and also explain the reaction of M with oxygen

06/11/2024

Science

10th

Metals and Non-metals

Give the reaction involved during extraction of zinc from its ore by
(a) roasting of zinc ore
(b) calcination of zinc ore

06/11/2024

Science

10th

Metals and Non-metals

An alkali metal A gives a compound B (molecular mass = 40) on reacting with water. The compound B gives a soluble compound C on treatment with aluminium oxide. Identify A, B and C and give the reaction involved.

06/11/2024

Science

10th

Metals and Non-metals

An element A reacts with water to form a compound B which is used in white washing. The compound B on heating forms an oxide C which on treatment with water gives back B. Identify A, B and C and give the reactions involved.

06/11/2024

Science

10th

Metals and Non-metals

Name one metal and one non-metal that exist in liquid state at room temperature. Also name two metals having melting point less than 310 K (37°C)

06/11/2024

Science

10th

Metals and Non-metals

Give two examples each of the metals that are good conductors and poor conductors of heat respectively.

06/11/2024

Science

10th

Metals and Non-metals

A non-metal A is an important constituent of our food and forms two oxides B and C. Oxide B is toxic whereas C causes global warming
(a) Identify A, B and C
(b) To which Group of Periodic Table does A belong?

06/11/2024

Science

10th

Metals and Non-metals

What happens when
(a) ZnCO3 is heated in the absence of oxygen?
(b) a mixture of Cu2O and Cu2S is heated?

06/11/2024

Science

10th

Metals and Non-metals

Give the formulae of the stable binary compounds that would be formed by the combination of following pairs of elements.
(a) Mg and N2
(b) Li and O2
(c) Al and Cl2
(d) K and O2

06/11/2024

Science

10th