Which of the following pairs will give displacement reactions?

The ability of metals to be drawn into thin wire is known as

Which one of the following metals do not react with cold as well as hot water?

The composition of aqua-regia is

Alloys are homogeneous mixtures of a metal with a metal or nonmetal. Which among the following alloys contain non-metal as one of its constituents?

Which among the following statements is incorrect for magnesium metal?

Which among the following alloys contain mercury as one of its constituents?

Although metals form basic oxides, which of the following metals form an amphoteric oxide?

Electrical wires have a coating of an insulating material. The material, generally used is

Which of the following can undergo a chemical reaction?

What are ionic bonds?

Name a reducing agent that may be used to obtain manganese from manganese dioxide.

State two physical properties of gold which are of extreme use to jewellers.

Name a non-metal which is lustrous and a metal which is non-lustrous. 

Name the metal which reacts with a very dilute HNO₃ to evolve hydrogen gas.

Explain the meanings of malleable and ductile.

Why do ionic compounds have high melting points?

What are amphoteric oxides? Give two examples of amphoteric oxides.

Name the constituents of solder alloy. Which property of solder makes it suitable for welding electrical wires?

Explain why calcium metal after reacting With water starts floating on its surface. Write the chemical equation for the reaction.

(a) Name the chief ore of iron. Write its formula.
(b) How is an iron ore concentrated? Describe it briefly.
(c) Draw a labelled diagram of the blast furnace used in the extraction of iron from its concentrated ore.

State five points of differences between ionic compound and covalent compound.

Point out any 3 differences between calcination and roasting.

List three properties of sodium in which it differs from the general physical properties of most metals.

Write three differences between metals and non-metals on the basis of chemical properties.

Explain the following
(a) Reactivity of Al decreases if it is dipped in HNO₃.
(b) Carbon cannot reduce the oxides of Na or Mg
(c) NaCl is not a conductor of electricity in solid state whereas it does conduct electricity in aqueous solution as well as in molten state.
(d) Iron articles are galvanised 
(e) Metals like Na, K, Ca and Mg are never found in their free state in nature.

(a) What is an 'activity series' of metals? Arrange the metals Zn, Mg, Al, Cu and Fe in a decreasing order of reactivity.
(b) What would you observe when you put
       (i) Some zinc pieces into blue copper sulphate solution?
       (ii) Some copper pieces into green ferrous sulphate solution?
(c) Name a metal which combines with hydrogen gas. Name the compound formed.