Assertion : Aspirin can cause ulcer in stomach when taken empty stomach. Reason : Aspirin gets hydrolysed to salicylic acid in stomach where pH is 2.

Piyush’s mother used to take aspirin, an analgesic quite often to get relief from body pain. She is becoming habitual of it. Piyush is a science student and he asked his mother not to take overdoses of aspirin, though it is very popular. Overdoses may result into stomach problems. Why did Piyush stopped his mother to avoid overdoses of aspirin ?

These questions consist of two statements each,printed as Assertion and Reason.While asnwering these questions you are required to chose any one of the following four responses. If both Assertion and Reason are true and Reason in correct explanation of Assertion. If both assertion and Reason are true but reason is not correct explanation of Assertion. If Assertion is true but Reason is false. If both Assertion and Reason are false. Assertion:When CO_2 concentration of atmosphere increases,stomata close partially. Reason: CO_2 combines with water to form carbonic acid which lowers pH value and stomata close.