Chemistry Jamb CBT 3 (Original) Only

1. Which of the following ions requires the largest quantity of electricity for discharge at an electrode?

2. In the electrolysis of CuSO4(aq) using platinum electrodes, the reaction at the anode is

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

4. how long would it take to deposit 0.08g of copper from CuCl2 solution by passing a current of 0.5A?
{Cu = 64, F = 96500 C mol-1}

5. In the electrolysis of a concentrated solution of sodium chloride using inert electrodes, which of the following ions are discharged at the cathode and anode respectively?

6. H2(g) + Br2(g) → 2HBr(g)
The reaction above is carried out of 250C if ∆H is -72 KJ mol^-1 K^-1, the reaction will

7. How long would it take deposit 0.08g of copper from CuCl2 solution by passing a current of 0.5A?
{Cu = 64, F = 96500 C mol-1}

8

9. If the electron configuration of an element is 1s^2 2s^2 2p^5, how many unpaired electrons are there?

10.

The diagram above represents the formation of

11. Millikan’s contribution to the development of atomic theory is the determination of

12. Which of the following statements is true of a proton?

13. An electron can be added to a halogen to atom to form a halide ion with

14. Metalloids are also referred to as

15. What is the valence shell electron configuration of the element with atomic number 17?

16.

17. The number of isomers formed by C6 H14 is

18. The reaction of an alkene with hydrogen in the presence of a catalyst is

19. An isomer of C5 H12 is

20.

The IUPAC nomenclature of the compound above is

21.

The reverse reaction of the equation above is known as

22.
The decolourization of the purple colour of tetraoxomanganate (VII) ion is a test for

23.
Which of the following functional groups will give gas bubbles when treated with a saturated solution of sodium hydrogen trioxocarbonate(IV)?

A.

B.

C.

D.

24.
2 methylbut -2-ene has the structure

A.

B.

C.

D.

25.Which of the following compounds is a tertiary alkanol?

A.

B.

C.

D.

26.
How many structural isomers of chlorobutane are possible?

27. The basicity of CH3 COOH is

28.

The IUPAC nomenclature for the structure above is

29.

The major product of the dehydration of the compound above is

A.

B.

C.

D.

30. Which of the following polymers is suitable for packaging and electrical insulation?

31. The principal constituent of natural gas is

32. In the reaction: E + F ⇋ G + H, the backward reaction is favoured if the concentration of

33.

Which of the following would introduce the greatest increase in the rate of the chemical reaction above?

34. Atoms of element x (with 2 electrons in the outer shell) combine with atoms Y (with 7 electrons in the outer shell). Which of the following statements is FALSE? The compound formed

35. The ions X and Y are isoelectronic each containing a total of 10 electrons. How many protons are in the nuclei of the neutral atoms of X and Y respectively?

36. The electronic configuration of an element is 1s^2 2s^2 2p^6 3s^2 3p3. How many unpaired electrons are there in the element?

37. Which of the following represents the type of bonding present in the ammonium chloride molecule?

38. Water molecules are held together by

39. How many sigma bonds are there in a benzene ring?

40. Which of the following decreases from left to right across the period but increases down the group in the periodic table?

41. What is emitted during the disintegration of barium nucleus as shown by the equation below:

42. Which of the following molecules in linear?

43. Which of the following properties is not characteristics of electrovalent compounds?

44. The maximum number of electrons that can be accommodated n the shell having the principal quantum number 3 is

45. An element X has electron configuration 1s^2 2s^2 2p^6 3s^2 3p^5. Which of the following statements is correct about the element?

46. Beryllium and aluminium have similar properties because they

47. If the difference in electronegativity of elements p and Q is 3.0. the bond that will be formed between them is

48. How many protons, neutrons and electrons respectively are present in the element?

49. The radioactive radiation used in studying the arrangement of particles in organic molecules is

50. The most abundant element on the earth’s crust is