Question

Two statements are given- one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes a), b),c) and d) as given below
a) Both A and R are true and R is correct explanation of the assertion.
b) Both A and R are true but R is not the correct explanation of the assertion.
c) A is true but R is false.
d) A is false but R is true.
A: Calcium carbonate when heated gives calcium oxide and water.
R: On heating, calcium carbonate, decomposition reaction takes place.
A: Brown fumes are produced when lead nitrate is heated.
R: Nitrogen dioxide gas is produced as a by product due to the decomposition of lead nitrate.
A: Iron articles get coated with reddish brown powder when left for sometime in the open.
R: Iron is attacked b y substances around it such as moisture, acids etc.

Answer 1

Answer:

A is true but R is true

A is false but R is true