Chapter 1 Questions for practice-

Questions for practice.

Sulekha Rani.R, P.G.T Chemistry , K V NTPC Kayamkulam

Chapter 1-Chemical reactions

1. Define the following

(a) combination reaction

(b) Decomposition reaction

(c) displacement reaction

(d) Double displacement reaction

2. Explain why reaction between quick lime and water is a combination

reaction? name the produact and writes its balancechemical equation?

3. what will happens and identify the chemical reaction and write balanced

chemical equation

(a) lead nitrate on heating

(b) burning of magnesium

(c) add water to quick lime

(d) silver chloride exposed to sunlight

(e) pass electricity throgh acidified water

(f) during respiration

(g) limestone is heated

(h) burning of coal

(i) on heating copper powder in air in a china dish.

(i) sulphuric acid is added to barium chloride solution?

4. Give one example of a chemical change in which heat is liberated?

5. Give one example of a chemical change in which heat is absorbed?

6. Why is respiration considered as exothermic?

7. Pb(NO₃)_{2 reacted with KI (i) type of reaction (ii) name the precipitate and mention its colour (iii) write balance chemical equation.}

Holyday Chemistry Project for Class X

Sulekha Rani.R, P.G.T Chemistry , K V NTPC Kayamkulam

1. Prepare your own indicator ( refer NCERT text book)

(for the preparation you can select... red cabbage leaves, turmeric(haldi) petals of some coloured flowers)
2. Using your indicator test the following substance and find out whether they are acid or base.
these materials you can collect from your surroundings and from your home.
vinegar, bakking soda (appakkaram) , soap solution, tamarind juice, lemon juice ,
tomatto juice, milk.
Format for writting project.
1. Aim and Objective
2. Materials required
3. Theory
4. Procedure
5. Observation ( table includes. substance tested, indicator colour, colour change, inferance)
6. Result and conclution .