Question

02 What are the two advantages to classify the resources into
renewable and non-renewable?
03 What are the three changes that can reduce the use of coal and
petrol
Section - B
3 Marks Questions
Chap - 1 Chemical Reactions and Equations
01 Write the chemical reaction and type of reaction of the following
a) Burning of Mg strip in air.
b) Electrolysis of water
c) Ammonia mix with HCl gas.
02 When silver nitrate and sodium cloride soultions are mix, white
precipitates are obtained. Name the white ppts and name the
type of reaction .
03 Write one example of exothermic and endothermic reaction.
04 Give reason: "Zn plate is used to prevent corrosion of ship"
05 Give reason: "Food items should be stored in closed vessel
06 Give reason: "Silver nitrate is stored in brown bottle"
07 Give the difference:
a) Exothermic and endothermic reaction
b) Oxidation and reduction
08 Difference between displacement and double displacement
reaction with example.
Chap - 2 Acids, Bases and Salts
01 Which first aid should be used at the time of bee sting?
02 What should be done to cure painful stings of Nettle leaf?
03 Explain the importance of pH in daily life.
04 Explain with example how animal and plants are sensitive with
pH
05 pH of solution A S and of solution B -8.So in which solution
concentration of hydrogen ion is more. And derive which
solution is basic and acidic.
06 What is indicator ? Explain in detail​

Answer 1

Answer:

Explanation:

electric energy

solar energy