Element ‘M’ forms a chloride with the formula MCl₂ which is sold with high melting point. To which group of the Periodic table does the element ‘M’ belong?

Show the electronic transfer in the formation of MgCl₂ form its elements.

Give reason for the following:

(a) Aluminium oxide is considered as an amphoteric oxide.

(b) Ionic compounds conduct electricity in molten state.

Show on a diagram the transfer of electrons between the atoms in the formation of MgO. Write symbols of cation and anion present in MgO.

Name the solvent in which ionic compounds are generally soluble.

Why are aqueous solutions of ionic compounds able to conduct electricity?

A metal ‘X’ loses two electrons and a non-metal ‘Y’ gains one electron. Show the electron dot structure of compound formed between them. Is it ionic or covalent? Does it have high melting point or low? Will it conduct electricity in solid state or in aqueous solution and why? Will it be soluble in water?

State reasons for the following observations:

(a) The shining surface of some metals becomes dull when exposed to air for a long time.

(b) Zinc fails to evolve hydrogen gas on reacting with dilute nitric acid.

(c) metal sulphides occur mainly in rocks but metal halides occur mostly in sea and lake waters.

With the help of a suitable example, explain how ionic compounds are formed State any three general properties of ionic compounds.

Four metal A, B, C and D are added to the following aqueous solutions one by one. The observations made are tabulated below:

Answer the following questions based on the above observations:

(a) Which is the most active metal and why?

(b) What would be observed if B is added to a solution of copper (II) sulphate and why?

(c) Arrange the metal A, B, C and D in order of increasing reactivity.

(d) The container of which metal can be used to store both zinc sulphate solution and silver nitrate solution?

(e) Which of the above solutions can be easily stored in a container made up of any of these metals?

Sample of five metals ‘A’, ‘B’, ‘C’, ‘D’ and ‘E’ was taken and added to the following solution one by one. The results obtained have been tabulated as follows.

Use the above table to answer the following questions about the given metals.

(a) Which of them is most reactive and why?

(b) What would you observe if ‘B’ is added to CuSO₄?

(c) Arrange ‘A’, ‘B’, ‘C’, ‘D’ and ‘E’ in the increasing order of reactivity.

(d) Container of which metal can store zinc sulphate and silver nitrate solution?

(e) Which of the above solution(s) can be stored in a container made of any of these metals and why?

What are alloys? How are they made? Name the constituents and uses of brass, bronze and solder.

(a) What is meant by corrosion? Name any two methods used for the prevention of corrosion.

(b) Suppose you have to extract metal M from its enriched sulphide ore. If M is in the middle of the reactivity series, write various steps used in extracting this metal.

Reema’s maid fainted in her house. Reema took her maid to doctor. After check-up Doctor fond she suffered from anaemia Doctor advised her to take vegetables and fruits rich in iron. Doctor gave her some folic acid tablets which contain iron (II) sulphate. Reema helped her maid financially also.

(a) What values are possessed by Reema?

(b) Deficiency of which metal cause anaemia?

(c) What is a formula of folic acid?