Chemistry JAMB MOCK TEST

1. The nucleus of an atom contains

2. 1s², 2s², 2p⁶, 3s², 3p⁶, 3d⁷, 4s²
An element with the electronic configuration above is a

3. The number of atoms of chlorine present in 5.85g of NaCl is [Avogaro's Number = 6.02 x 10²³]

4. An element with atomic number twelve is likely to be

5. An organic compound contains 60% carbon, 13.3% hydrogen and 26.7% oxygen. Calculate the empirical formularn(C=12,H =1, O=16)

6. The periodic classification of elements is an arrangement of the elements in order of their

7. Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore,

8. When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called

9. Ozone is unstable, decomposing to oxygen, as shown in the balanced equation 2O2 ➡ 3O2. In this reaction, how many grams of oxygen can be formed from the decomposition of 96g of ozone?

10. A saturated solution is defined as

11. The ion that can be used as an oxidizing agent is

12. 2C₂H_2(g) + 5O_2(g) → 4CO_2(g) + 2H₂O_(g)
In the reaction above, the mass of carbon(IV)oxide produced on burning 78 g of ethyne is
[C =12, O = 16, H = 1]

13. If 30cm³ of gas at 50^oC is warmed to 80^o at a fixed pressure, the fractional increase in volume is

14.

15. Which of the following is a Tertiary alcohol

16.

17. When salt loses its water of crystallization to the atmosphere on exposure, the process is said to be

18. Atomicity of ozone is

19. 2-methylbut-2-ene has the structure

20. Which of the following functional groups will give gas bubbles when treated with a saturated solution of sodium hydrogen trioxocarbonate (IV)?

21. Iron is often galvanized in order to

22. In the industrial production of H₂ is removed by (solution)

23. The gas that is most useful in protecting humans against solar marathon is

24. Vulcanization involve the removal of

25.

26. The filter in the cigarette reduce the nicotine construct by

27. Which of these require crystallization most?

28. Sucrose is made up of

29. Alkanones are generally obtained by the oxidation of

30. The reaction of carbide with water gives

31.

32. The conditions necessary for the extraction of a water molecule from two molecules of ethanol are

33. A common characteristics of copper and silver in their usage as coinage metals is that they

34. Haematite is an ore of

35.

36. The repeating unit in natural rubber is

37. Unsaturated organic compounds are identified by decolourization of

38. Zinc and carbon rods are used as anode and cathode respectively in a

39. The solution that will conduct the highest amount of electricity is

40. In which of the following is the oxidation number of sulphur equal to -2?