Chemical Reactivity – MCQ’s

(a) calcium

(b) carbon

(c) oxygen                 ✓

(d) nitrogen

3. The electronegative and non-metallic character from top to bottom

(a) increases

(b) decreases              ✓

(c) remain same

(d) stable

4. Chlorine only reacts with methane in

(a) darkness

(b) sunlight                 ✓

(c) yellow light

(d) screened light

5. Chlorine has colour:

(a) pale yellow

(b) greenish yellow    ✓

(c) reddish brown

(d) purple black

6. These are highly oxidizing agents

(a) alkali metals

(b) alkaline earth metals

(c) transition metals

(d) halogens  ✓

7. The highest electronegative element in periodic table is

(a) fluorine              ✓

(b) chlorine

(c) bromine

(d) iodine

8. The electronic configuration of halogens is

(a) ns² np⁵

(b) ns² np³

(c) ns³ np⁵                  ✓

(d) ns² np²

9. Non-metals are electronegative in nature and form oxides.

(a) acidic             ✓

(b) basic

(c) neutral

(d) suboxide

10. It is used to make jewelry items because of its unique characteristics like colour beauty, strength, flexibility and resistance to tarnish.

(a) gold

(b) platinum                ✓

(c) silver

(d) copper

11. White gold is an alloy of

(a) gold + palladium + zinc

(b) palladium  + silver + nickel

(c) gold + silver + copper

(d) palladium  + nickel  + zinc  ✓

12. The alkaline earth metals are smaller in size and have more

(a) ionization energy

(b) electron affinity    ✓

(c) nuclear change

(d) electropositive

13. All alkali metals have the largest size and the lowest in their respective periods.

(a) electro negativity   ✓

 (b) ionization energy

(c) electron affinity

(d) electro positivity

14. Metals have the tendency to lose their valence electron. This property of a metal is termed as

(a) electro negativity

(b) electro positivity   ✓

(c) electron affinity

(d) ionization power

15. Copper, mercury, silver and gold are the examples of metals

(a) very reactive

(b) moderately

(c) least reactive       ✓

(d) none of these

16. Cation in formed, when an element – electron to its outermost shell

(a) loses                ✓

(b) gains

(c) donates

(d) shares

17. Metals which are easily oxidized are said

(a) negative metals

(b) state metals

(c) reactive metals           ✓

(d) non-reactive metals

18. A metal in a compound always exists in which oxidation sate

(a) negative

(b) positive            ✓

(c) neutral

(d) zero

19. Ionization energy of sodium is less than

(a) aluminum

(b) magnesium

(c) copper

(d) all of these  ✓

20. All metals are solids except

(a) sodium

(b) magnesium

(c) mercury         ✓

(d) gold

21. The most valuable metal among the following is

(a) Gold

(b) Uranium  ✓

(c) Osmium

(d) Rubidium

22. The heaviest metal is

(a) Uranium

(b) Gold

(c) Osmium               ✓

(d) Calcium

23. Lithium has density

(a) 0.53gcm^-3                 ✓

(b) 1.53gcm^-3

(c) 15.3gcm^-3

(d) 3.5gcm³

24. Mark which one is non-metal?

(a) Sodium

(b) Calcium

(c) Nitrogen               ✓

(d) Mercury

25. Which one of the following will not react with HCl?

(a) Carbon            ✓

(b) Silver

(c) Zinc

(d) Copper

26. Sodium does not react with

(a) Carbon

(b) Nitrogen

(c) Hydrogen

(d) Both a and b  ✓

27. Which metal burns with golden yellow flame

(a) Calcium

(b) Barium

(c) Sodium                ✓

(d) Potassium

28. Which metal is used in Thermite process to ignite aluminum powder

(a) Na

(b) Mg  ✓

(c) Ca

(d) Be

29. Silver is get tarnished by

(a) Atmosphere oxygen

(b) Nitrogen

(c) Hydrogen sulphide         ✓

(d) Carbon dioxide

30. Which metal is used for making mirrors?

(a) Lead

(b) Iron

(c) Silver               ✓

(d) Lithium

31. Which one of the following metal has yellow colour

(a) Lead

(b) Gold  ✓

(c) Iron

(d) Potassium

32. Gold is always alloyed with one, among the following metals

(a) Sodium

(b) Mercury

(c) Copper                ✓

(d) Calcium

33. Sodium is used for the refining of which metal

(a) U

(b) Zn

(c) Ti                   ✓

(d) Zr

34. How many series of d-block elements are there in the periodic

(a) Three                ✓

(b) Four

(c) Five

(d) Two

35. Three transition elements Cu, Ag and Au constitute group number

(a) 9

(b) 10

(c) 11           ✓

(d) 12

36. The least electronegative element among the halogens is

(a) Fluorine

(b) Chlorine

(c) Bromine

(d) Iodine  ✓

37. Which of the following halogen has pale yellow colour?

(a) F₂                ✓

(b) Cl₂                     

(c) Br₂

(d) I₂

38. Which one of the following makes covalent bond with halogens

(a) Na

(b) K

(c) O        ✓

(d) Mg

39. Identify among the following which one is semimetal

(a) Lead

(b) Zinc

(c) Silicon

(d) Galium  ✓

40. The general electronic valence shell configuration of alkali metals is

(a) ns²

(b) ns^{1              ✓}        

  (c) ns², np¹

(d) ns², np²

41. Hydrogen is released when water reacts with

(a) Na

(b) Mg

(c) K

(d) All of them  ✓

42. Which metal releases electron from its outermost shell the most easily

(a) Na

(b) K           ✓

(c) Mg

(d) Ca

43. Which one among the halogens has least affinity with hydrogen?

(a) F₂

(b) Cl₂                 

     (c) Br₂

(d) I_{2  ✓}

44. In diffused sun lights chlorine reacts with methane to form

(a) CH₃Cl

(b)  CH₂Cl₂       

(c) CCL₄

(d) All of above  ✓

45. In the earth crust the highest %age of oxygen is

(a) 47%             ✓

(b) 86%

(c) 90%

(d) 24%

46. The %age of oxygen in oceans is:

(a) 47%

(b) 86%         ✓

(c) 90%

(d) 24%

47. The %age of oxygens in air is:

(a) 21%              ✓

(b) 24%

(c) 26%

(d) 30%

48. Which one of the following will form amphoteric oxides?

(a) Na

(b) N

(c) Si                 ✓

(d) S

49. Which halogen reacts with water in dark and cold state

(a) F₂                     ✓

(b) Cl₂                     

(c) Br₂

(d) I₂

50. Indicate the least reactive metal among the following

(a) Gold                ✓

(b) Zinc

(c) Iron

(d) Tin

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