Chemistry XII Karachi Board True and False

1. PVC is a polymer of benzene.

2. Fructose is a reducing sugar.

3. The deficiency of vitamin C causes scurvy.

4. Methanol causes blindness.

5. Diamond is the hardest known substance in the world.

6. The properties of boronoxide are acidic.

7. Graphite is a good conductor of electricity.

8. The deficiency of vitamin A causes night-blindness.

9. Wurtz reaction can be used to prepare Methane.

10. Bakelite is polymer of phenol and alkyl halide.

11. The heat of hydration of Li+ ion is equal to that of Cs+ ion.

12. The molecule of H2S is non-linear.

13. CuSO4 in excess of NH3 forms Cu(OH)2.

14. Compounds have benzene ring are called aeromatic.

15. Polyethenes are the most common plastics.

16. Lead-containing paints are banned because of the high cost.

17. Na2CO3 decomposes on heating.

18. The atomic weights of isotopes are different because of the difference in the number of protons.

19. Gastric juice is pale yellow in colour.

20. Ascorbic acid is enzyme.

21. The main function of carbohydrates is to circulate blood.

22. The preparation of vegetable ghee is a dehydrohalogenation process.

23. There are eight periods and seven groups in the Periodic table.

24. Hydrated copper sulphate is a white crystalline solid.

25. Pure diamond is colourless.

26. The first transition series starts from scandium and ends at zinc.

27. Markownikoff’s rule is not applicable to alkynes.

28. Methylated spirit is ethanol containing some methanol.

29. A functional group is the most reactive part of the molecule.

30. Vitamins A.D.K are water-soluble vitamins.

31. Kerosene oil is a petroleum product.

Answers to True and False

Five Year Papers

1. False


2. True

3. True


4. True

5. False


6. True

7. True


8. False

9. False


10. False

11. True


12. False

13. True


14. True

15. False


16. True

17. False


18. False

19. False


20. False

21. False


22. False

23. False


24. False

25. True


26. True

27. False


28. True

29. True


30. False

31. True