C. Fill in the blanks.
1. The substances which undergo a chemical change are called_____________
2. Photosynthesis is a_______
reaction.
3. In_________reactions, heat is liberated.
4.________is a chemical reaction in which reactants and products are in different physical states.
5.__________is a reaction, which proceeds in the direction towards the formation of products only.
6. Displacement reactions are also called______reactions.
7. A substance which alters the rate of a chemical reaction is called___________
8. Metals above hydrogen in the activity series can displace
__________ from water
9. A reaction in which addition of oxygen or any other electronegative radical takes place is called__________
10. A process in which addition of hydrogen or any other electropositive radical takes place is called________
Answers
Answer:
1.reactants.
2.endothermic
3.exothermic
4.neutrilisation
5.reversible
6.substitution
7.catalyst
8.hydrogen
9.oxidation reaction
10.reduction reaction
Answer:
1. The substances which undergo chemical change are called reactants
2. Photosynthesis is a chemical reaction that takes place inside a plant, producing food for the plant to survive. Carbon dioxide, water and light are all needed for photosynthesis to take place. Photosynthesis happens in the leaves of a plant.
3. exothermic reaction
An exothermic reaction is a chemical or physical reaction that releases heat. It gives out energy to its surroundings. The energy needed for the reaction to occur is less than the total energy released.
4. Neutrilisation is a chemical reaction in which reactants and products are in different physical states.
5. reversible is a reaction, which proceeds in the direction towards the formation of products only.
6. Displacement reactions are also called substitution reactions.
7. catalyst
A catalyst is defined as a substance which alters the rate of a reaction without being consumed in the reaction.
8. Metals above hydrogen in the activity series can displace hydrogen from water.
9. oxidation
To summarise, the term “oxidation” is defined as the addition of oxygen/electronegative element to a substance or removal of hydrogen/ electropositive element from a substance. In the beginning, reduction was considered as removal of oxygen from a compound.
10. A process in which addition of hydrogen or any other electropositive radical takes place is called reduction reaction
Explanation:
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