Hello Students !
Welcome to Mystery In Chemistry’s Tips & Tricks series. Understanding chemistry and scoring high in exams are two different things and hence require different set of skills. Let us learn the 12th tip to help you score 100/100 in chemistry.
So, here is the 12th tip. How to solve Multiple Choice Questions? Multiple choice questions or MCQs are most scoring questions. However, getting the correct answer is quite difficult thing.
Let us discuss some tricks to crack MCQs. But remember, these tricks are only needed, when you have no clue about the correct answer. First point. Analyze question carefully, before choosing the right answer. Next If there is no negative marking, attempt all MCQs. Read the complete question. Like Ex 1…..d. all of the above So here just after reading '"a" you may decide, it is the correct choice. But on further reading you may discover "b" and "c" are also right, so "d" all of the above is the correct answer. In case of doubt, jump to next question. While solving other questions you may get some clue for this question. Look for the similar or opposite choices. Keep a close watch. Answer may be from that only.
Now. Make a smart guess: yes!
Figure out intelligently the right choice. Keep the odd one out. Elimination Technique is a wonderful hack to make smart guess in MCQs Each MCQ in an exam has 3 or 4 possible options. Reduce the number of options by elimination. Eliminate the options, which are entirely not possible. As in Ex.2 If the options are: a. 4 b. 456 c.7 d . -84, Here you are sure that extreme numbers 456 and -84 are not possible. So eliminate "b" and "d" and then make a smart guess. The answers are generally between numbers that are close, like 4, 7.
Sometimes Think out of the box: Always check units of the answers. Big calculations are never expected in 1 mark questions. As in Ex.3 The decomposition of carbon disulphide, CS2, to carbon monosulfide, CS, and sulfur is first order with the half-life at 1000oC is 2.5 x 106 s.
Calculate the value of k at 1000 deg C. CS2 = CS + S a.5.0 x 107 L mol-1 s-1 b. 4.7 x 10-6 L2 mol-2 s-1 c.2.8 x 10-7 s-1 d. 6.1 x 104 L2 s2 mol-2
Here, do not go for big numerical values and big calculations. Just read the question carefully. It is first order reaction and so the unit of k should be s-1. c. Is the correct choice
Do not ponder too long: Guessing the answer in MCQ is no less than getting hypnotized. The more time you spend on a question, more you will be confused. And the last one: Stay calm and Confident. A calm mind can pick right answer easily.
Thank you!
I especially appreciated the structured approach you outlined, which demystifies complex concepts. For anyone looking for additional resources to practice these methods, checking out some Free Test Papers can be incredibly beneficial. They provide a variety of problems that help reinforce the techniques discussed here.
ReplyDelete