Question

CH 1: CHEMICAL REACTIONS AND EQUATIONS( REVISION) Directions (Q. Nos. 09-13) In the following questions a statement of Assertion is followed by a statement of Reason, Mark the correct choice as (a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion. (b) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion. (c) If Assertion is true but Reason is false. (d) If Reason is true but Assertion Is false. (e) if both Assertion and Reason are false. Q9. Assertion: Chemical reaction changes the physical and chemical of a substance. Reason: When electric current is passed through water (liquid), it poses to produce hydrogen and oxygen gases. 010. Assertion: In a balanced chemical equation, total mass of the each element towards reactant side= total mass of the same element towards product side. Reason: Mass can neither be created nor destroyed during a chemical change. Q11. Assertion: When calcium carbonate is heated, it decomposes to give calcium oxide and carbon dioxide. Reason: The decomposition reaction takes place on application of heat, therefore, its and endothermic reaction. Q12. Assertion: Chips manufacturers usually flush bags of chips with gas such as nitrogen to prevent the chips from getting oxidised. Reason: This increase the taste of the chips and helps in their digestion. Q13. Assertion: Rusting of iron metal is the most common form of corrosion. Reason: The effect of rusting of iron can be reversed if they are left open in sunlight​

Answer 1

Answer:

9 . d)  If Reason is true but Assertion Is false.

10. (a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion

11. a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion

Hope it helps u !!

Answer 2

Q9 : (d) If Reason is true but Assertion Is false.

Q10 : (a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

Q11 : (a) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

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