When opportunities come to you, you can either wave them by or you can take action. Most times, over 70% of the decision power lies within you. It will be very sad if, after all the preparation, you fail the test. At that point, there can only be one explanation – you didn’t prepare right.
This is a special package from us to enable you have a full preview of the examination, prepare with them ahead of time and place them on a winning side. This past questions and answers will help you in the examination and your success will depend on how you use this materials for the examination and nothing more.
This past questions and answers is the compilation of all the questions in the examination that have been asked during the exams in previous years. Student who used this past questions have given testimonies of how it helped them scale through successfully and we made it available for you.
Why you need Chemistry Alternative to Practical Past Questions
Past questions helps identify your strength and weaknesses and capitalize on it. We all know that there are some subjects you know more than others. Understanding this helps you to first answer the subjects you know and like the most before moving to other less interesting and difficult questions.
How is Chemistry Alternative to Practical Past Questions Pattern?
Past question past questions and answers are patterned in multiple choice format, theory and practicals and it is not usually computer based. All Candidate are expected to be in the hall on time with their exams materials. This exams involves calculation which means you are to bring mathematical instruments, logarithm tables and calculator to assist you in the examination hall instead of coming with the intentions of getting from your neighbor to distract them and to also put yourself in trouble.
Samples of Chemistry Alternative to Practical Past Questions
1. A is 0.100 mol dm-3 solution of an acid. B is a solution NAOH containing 2.8 g per 500 cm3.
(a) Put A into the burette and titrate it against 25.0 cm3 portions B using methyl orange as indicator. Repeat the titration to obtain consistent titres. Tabulate your readings and calculate the average volume of A used.
(b) From your results and the information provided above, calculate the:
(i) number of moles of acid in the average titre;
(ii) number of moles of NAOH in the volume of B pipetted;
(iii) mole ratio of acid to base in the reaction
[Na= 23.00 H=1.00, O = 16.0]
ANS: (a) titration soon.
(b) (i) number of moles of acid = 0.100 x VA
= X mole(s) [3sig. Fig to score]
1000cm3 contains 0.100 mole(s)
VA will contain 0.100 x VA
= X moles [3 Sig. Fig. to score]
(ii) Number of moles of NAOH in B
500cm3 of B contains 2.8g of KOH
1000cm3 of B will contain 2.8 x 1000 = 5.6 KOH
Molar mass of NAOH = 23 + 16 + 1 or 40 gmol-1
Conc of B = 5.6 = 0.100 mol dm-3
(iii) Mole ratio of acid to base = X: Y to nearest whole number ratio.
- C is a mixture of two salts. Carry out the following exercises on C. Record your observations and identify any gas(es) evolved. State the conclusion drawn from the result of each test.
(a) Put all of C into a boiling tube and add about 5cm3 of distilled water. Stir thoroughly and filter. Keep both the residue and the filtrate.
(b) To about 2 cm3 of the filtrate, add few drops of Pb(NO3)2(aq)‑Boil the mixture and then allow to cool.
(c) (i) Put the residue in a test tube and add dilute HNO3. Shake the mixture and divide the solution into two portions.
(ii) To the first portion from (c)(i), add NaOH(aq) in drops and then in excess.
(iii) To the second portion from (c)(i), add aqueous ammonia in drops and thein in excess.
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7 Tips to Prepare for Chemistry Exams
- Don’t make reading your hobby: A lot of people put reading as a hobby in their CV, they might be right because they have finished schooling. But “You” are still schooling, so reading should be in top priority and not as a hobby. Read far and wide to enhance your level of aptitude
- Get Exams Preparation Materials: These involve textbooks, dictionaries, Chemistry past questions and Answers, mock questions, and others. These materials will enhance your mastering of the scope of the exams you are expecting.
- Attend Extramural Classes: Register and attend extramural classes at your location. This class will not only help you refresh your memory but will boast your classroom understanding and discoveries of new knowledge.
- Sleep when you feel like: When you are preparing for any exams, sleeping is very important because it helps in the consolidation of memory. Caution: Only sleep when you feel like it and don’t oversleep.
- Make sure you are healthy: Sickness can cause excessive feelings of tiredness and fatigue and will not allow you to concentrate on reading. If you are feeling as if you are not well, report to your parent, a nurse or a doctor. Make sure you are well.
- Eat when you feel like: During the exam preparation period, you are advised not to overeat, so as to avoid sleep. You need to eat little and light food whenever you feel like eating. Eat more of fruits, drink milk and glucose. This will help you to enhance retention.
- Reduce your time in social media: Some people live their entire life on Facebook, Twitter, WhatsApp, Messenger chat. This is so bad and catastrophic if you are preparing for exams. Try and reduce your time spending on social media during this time. Maybe after the exams, you can go back and sleep in it.
If you like these tips, consider sharing them with your friends and relatives. Do you have a question or comments? Put it on the comment form below. We will be pleased to hear from you and help you to score as high as possible.
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