Chemistry – GK Quiz

Chemistry – GK Quiz

1. The National Chemical Laboratory is situated in

2. The metal that is usually extracted from sea water is

3. Equal masses of oxygen, hydrogen, and methane are kept under identical conditions. The ratio of the volumes of gasses will be

4. The inert gasses are ____ in water

5. The mass number of an atom is equal to

6. The maximum number of covalent formed by nitrogen is

7. The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of

8. The formula C6H5-CO-CH3 represents

9. The method of concentrating the ore which makes use of the difference in density between ore and impurities is called

10. The molecular formula of phosphorus is

11. The hardest form of carbon is

12. The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of

13. The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3

14. The number of electrons presents in H+ is

15. The hottest part of the gas flame is known as

16. The most important ore of aluminium is

17. The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is

18. The half-life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?

19. The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is

20. The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in

21. The iron ore magnetite consists of

22. The major constituent of air is

23. The mineral containing both magnesium and calcium is

24. The main chemical constituent of clay is

25. The metal does not give H2 on treatment with dilute HCL is

26. The ionization energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

27. The number of g-molecule of oxygen in 6.02 x 1024CO molecules is

28. The main active constituent of tea and coffee is

29. The most extensive, commercially useful source of thorium as monazite sand occurs in India at

30. The maximum number of isomers for an alkene with molecular formula C4H8 is

31. The hydronium ion is

32. The method that cannot be used for removing permanent hardness of water is

33. The most electropositive elements among the following is

34. The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?

35. The first metal used by man was

36. The gas used for artificial ripening of green fruit is

37. The high reactivity of fluorine is due to

38. Zone refining is used for the purification of

39. The molecule which has the highest percentage of ionic character among the following is

40. The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is



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