June 21 JAMB CHEMISTRY ANSWER 2021

PLEASE KINDLY TRACE IT FROM YOUR SYSTEM

1-0

2-carbon dioxide

3-1s^2 2s^2 2p^6 3s^1

4-alkanes

5-carbondioxide

6-sodium formate

7-+7

8-oxygen and moisture

9-the sum of numbers of protons andneutrons in the nucleus of

the atom

10-both have identical electronic configuration

11-one molecule of oxygen reacts with two molecules of

hydrogen to give

two molecules of water

12-loss of electrons

13-the Avogadro number

14-the elements forming the compounds normally have their

valency electrons

in a shared state

15-a dehydrating agent

16-an oxidizing agent

17-bubbling air through the acid

18-negative ions are discharged at the anode by losing

sufficient

electrons neutral

19-CaO

20-C4HW

21-different physical but the same chemical properties

22-small molecules form giant molecules

23-11.2dm^3

24-the reaction is endothermic

25-unsaturated

26-its temperature increases

27-condensation products of long-chain fatty acids and glycerol

28-yellow phosphorus ignites when rubbed on a rough surface

29-384,000

30-27.3cm^3

31-law of definite proportion

32-Na2SO4 +SO2 +S +H2O

33-Three of the compounds are gaseous at 20degree celsius

34-Every molecule has the same kinetic energy at a particular

temperature

35-covalent

36-6.67dm^3

37-Fe2O3+ 3C- 4Fe + 3CO2

38-2.66

39-5.3gm

40-Iodine