In the following questions the assertion and reason have been put forward . Read the statements carefully and choose the correct alternative from the following:
(a) Both the assertion and reason are correct and the reason is the correct explanation of the assertion.
(b) The assertion and reason are correct but the reason is not the correct explanation of the assertion.
(c) Assertion is true but reason is false.
(d) The statement of the assertion is false but the reason is true.
Assertion: AgBr is used on photographic and X-ray film.
Reason: AgBr is photosensitive and changes to silver and bromine in the presence of sunlight.
Assertion: Magnesium ribbon keeps on burning in atmosphere of nitrogen.
Reason : Magnesium reacts with nitrogen to form magnesium nitrides and reaction is exothermic.
Answers
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Answer:
1 (a)
2 (d)
Explanation:
1. Both are correct, reason is explaining the assertion because AgBr is photosensitive and dissociates in presence of light
2. Magnesium burns in air to produce oxide and nitride, not in atmosphere of purely of nitrogen. The reaction is exothermic thats why heat and light in the form of dazzle is released
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