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Question 1 of 25
1. Question
A 512cm3 sample of a gas weighed 1.236g at 20oC and a pressure of one atmosphere. The relative molecular mass of the gas is [R = 8.314JK-1mol-1; 1 atm = 101,325 J m-3]
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Question 2 of 25
2. Question
The amount of methane molecules, CH4Â in 8.0 grams of methane is
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Question 3 of 25
3. Question
The concentration of a solution obtained by dissolving 0.53g of pure anhydrous Na2CO3 in water to make 250 cm3 of solution is
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Question 4 of 25
4. Question
What is the maximum volume of CO2 at s.t.p. that can be obtained when dilute hydrochloric acid is added to 10 grams of CaCO3? [Ca = 40, C = 12, O = 16]
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Question 5 of 25
5. Question
Sulphur (IV) oxide travels a given distance in 10 sec. How long will it take equal volume of Helium to travel the same distance under the same conditions? [S = 32, O = 16, He = 4]
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Question 6 of 25
6. Question
The volume of hydrogen gas produced at S.T.P. when 100ml of 2M hydrochloric acid reacts with excess zinc is:
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Question 7 of 25
7. Question
All the following will liberate a gas when reacted with dilute hydrochloric acid except
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Question 8 of 25
8. Question
The isomer of a compound C5H10 which does NOT decolourise bromine water is
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Question 9 of 25
9. Question
A mixture of Nitrogen, Oxygen and Helium contains 0.25, 0.15 and 0.4 mole of these gases respectively. If the pressure contribution due to oxygen was 2.5atm. The partial pressure of Helium is
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Question 10 of 25
10. Question
Elements P has an atomic number of 12 while element Q has an atomic number 15. Combination of P and Q gave a compound PmQn
The respective values of m and n areCorrectIncorrect -
Question 11 of 25
11. Question
The Hydrocarbon CxHy, in the reaction above is most likely ______
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Question 12 of 25
12. Question
During electrolysis, two cells each containing molten Al2O3and fuse CaCl2
were connected in series. A current of 15 Amp was passed through the cells for a given period of time. At the end of the electrolysis 9g of calcium was found to have been deposited at the cathode what mass of Aluminium would be deposited in the second cell.
[Al = 27, Ca = 40]CorrectIncorrect -
Question 13 of 25
13. Question
The balanced equation for the reaction of Tin (ii) salt with potassium heptaoxodichromate (VI) in an acidic medium can be represented as
e, f, g, h, i and j are respectively:
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Question 14 of 25
14. Question
The pH of a solution containing 0.5 × 10-6 MH2SO4
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Question 15 of 25
15. Question
Which of the following oxides will NOT dissolve in both dilute hydrochloric acid and 2M Sodium hydroxide solution?
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Question 16 of 25
16. Question
The curve above represents the solubility curve of KClO3 The number of moles of KClO3 crystals produced by cooling 200cm3 of a saturated solution of the salt from 650C to 250C is
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Question 17 of 25
17. Question
During a compression process involving an ideal gas at pressure P1, V1 of the gas was halved, the temperature in Kelvin increases by half its initial value. The final pressure P2 is given by
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Question 18 of 25
18. Question
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Question 19 of 25
19. Question
Metal salts of long chain fatty acids are known as
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Question 20 of 25
20. Question
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Question 21 of 25
21. Question
The compound, when refluxed with dilute HCl, is hydrolyzed to give
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Question 22 of 25
22. Question
Cellulose and starch can be classified as one of the following
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Question 23 of 25
23. Question
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Question 24 of 25
24. Question
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Question 25 of 25
25. Question
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