Question

Veena observes that during winter setting of milk into curd takes more time while during summer, the same process happens faster. She asks about this difference in time taken to her elder sister. She also asks her sister about why certain reactions occur rapidly while others occur slowly. Her sister explains her about the various factors that affect the rate of chemical reactions. Based on the above scenario, answer the following questions. (a) Why do you think setting of curd occur at different rates during different seasons? (b) The rate of different reactions is different. Justify the statement. (c) The reaction of aluminium metal with dilute hydrochloric acid takes place faster as compared to zinc metal. What could be the reason for this difference? (d) How does the size of particles of reactants affect the rate of reaction? (e) You come across various chemical changes in your daily life. Mention any two chemical changes that occur slowly under normal conditions.

Answer 1

Answer:

Normal conditions are a restriction on philosophical arguments, especially in epistemology, in order to avoid objections perceived as digressive. As a reply to objections to an explanation of a phenomenon, e.g. a hypothesis or a theory, it is said, argument X holds [only] under normal conditions.