Each of these substances _in Pakistan.
Correct answer: B. is found
- A. are found
- B. is found
- C. have found
- D. were found
Explanation
B) is found is the correct answer because 'each' is a singular subject and requires a singular verb. The verb 'is' matches the singular nature of 'each'. The other options are incorrect because:A) are found: Uses a plural verb 'are', which does not agree with the singular subject.C) have found: This form suggests a completed action and does not match the singular subject.D) were found: Indicates past action and uses a plural verb form 'were', which again does not agree with 'each'.
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About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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