Metals and Non-Metals

Name a metal that is found abundantly in the earth’s crust.

Explain the following term:

Gangue

Explain the following term:

Ore

Distinguish between:

An ore and a metallic compound.

Distinguish between:

A mineral and an ore.

Which metal occurs as an oxide? Also give the name of its ore.

Which metal occurs as a carbonate?

Which metal occurs as a halide?

Which metal occurs as a sulphide?

From the metals: copper, iron, magnesium, sodium, and zinc, select a different metal in each case which:

Arrange the above metals in the decreasing order of reactivity.

From the metals: copper, iron, magnesium, sodium, and zinc, select a different metal in each case which:

Can form $2+$ and $3+$ ions,

From the metals: copper, iron, magnesium, sodium, and zinc, select a different metal in each case which:

Does not react with dilute hydrochloric acid.

Why do gold ornaments look new even after several years of use?

Why is hydrogen kept in the metal activity series?

Why are alkali metals kept in kerosene oil?

From the list of characteristics given below, select the five which are relevant to non-metals and their compounds:

A. Ductile,

B. Conduct electricity,

C. Brittle,

D. Acidic oxides,

E. Basic oxides,

F. Discharged at the anode,

G. Discharged at the cathode,

H. Ionic chlorides,

I. Covalent chlorides,

J. Reaction with dilute sulphuric acid yields hydrogen.

K. $1,2$ or $3$ valence electrons.

L. $5,6,7$ valence electrons.

(Write the five letters corresponding to the correct characteristics).

Name a non-metal which shows reducing property.

Name a non-metal which can form a positive ion.

Name two metals which react with cold water.

Name a metal which do not corrode easily.