Which of the statements about the reaction below are incorrect?
2PbO(s) + C(s) \(\rightarrow\) 2Pb(s) + CO₂(g)
(a) Lead is getting reduced      
(b) Carbon dioxide is getting oxidized
(c) Carbon is getting oxidized    
(d) Lead oxide is getting reduced.

Fe₂O₃ + 2Al \(\rightarrow\) Al₂O₃ + 2Fe.
The above reaction is an example of a 

What happens when dilute hydrochloric acid is added to iron fillings? Tick the correct answer

In the reaction, SO₂(g) + 2H₂S(g) \(\rightarrow\) 2H₂O(l) + S(s), the reducing agent is

Chemically rust is

Write the chemical equation to represent the reaction taking place when copper oxide is heated in a stream of hydrogen.

Give an example of photochemical reactions.

Name and state the law which is kept in mind while we balance a chemical equation.

State one basic difference between a physical change and a chemical change.

What happens when quick lime is added to water?

Why should a magnesium ribbon be cleaned before burning in air?

Why is the amount of gas collected in one of the test tubes (electrolysis of water) double of the amount collected in the other? Name this gas.

Why does the colour of copper sulphate solution change when an iron nail is dipped in it?

What happens chemically when quick lime is added to water?

How can you chemically remove the black coating of copper oxide?

Write the balanced chemical equations for the following reactions.
(a) Calcium hydroxide + Carbon dioxide \(\rightarrow\) Calcium carbonate + Water
(b) Zinc + silver nitrate \(\rightarrow\) Zinc nitrate + Silver
(c) Aluminium + Copper chloride \(\rightarrow\) Aluminium chloride + Copper
(d) Barium chloride + Potassium Sulphate \(\rightarrow\) Barium sulphate + Potassium chloride

A solution of potassium chloride when mixed with silver nitrate solution, an insoluble white substance is formed. Write the chemical reaction involved and also mention the type of the chemical reaction.

Define the term decomposition reaction. Give one example each of thermal decomposition and electrolytic decomposition.

Write the steps for balancing the chemical equation for the formation of ammonia by the combination of nitrogen and hydrogen.

You are provided with two containers made up of copper and aluminium. You are also provided with solutions of dilute HCl, dilute HNO₃, ZnCl₂ and H₂O. In which of the above containers theses solutions can be kept?