Introductory Chemistry MCQ’s

1. The ionization energy of sodium is……..

a. 496KJ/MOL

b. 496J/MOL

c. 462KJ/MOL

d. 367KJ/MOL

Correct Answer: a

2. The atomic ni increase from left to right ,the atomic radius ………

a. decerase

b. lower

c. higher

d. increase

Correct Answer: d

3. A negetive ion is always …….then parent atom:

a. larger

b. constant

c. same

d. smaller

Correct Answer: d

4. Electron affinity depend upon nuclear charge vacancies in………

a. nearest shell

b. subshell

c. middle shell

d. outermost shell

Correct Answer: d

5. The ionization energy of magnesium is:

a. 738KJ/mol

b. 728KJ/mol

c. 718KJ/mol

d. 748KJ/mol

Correct Answer: a

6. In periodic table,the ionization energy increases from:

a. right to left

b. top to bottom

c. irregular mode

d. left to right

Correct Answer: d

7. Electron affinities are influenced by:

a. covalent radii

b. atomic radius

c. electronegetivity

d. nature of orbital

Correct Answer: b

8. Electronegetivity value of N is:

a. 3

b. 2.5

c. 2.1

d. 3.5

Correct Answer: a

9. A negetively charged ion attracts:

a. proton

b. anion

c. cation

d. neutral

Correct Answer: b

10. The main global temperature at the earth is about:

a. 15C

b. 25C

c. 10C

d. 35C

Correct Answer: a

11. Which of the following oxide is amphoteric :

a. Al2O3

b. CaO

c. Br2O3

d. NH3

Correct Answer: a

12. Silicon are synthetic polymer containing linkage :

a. Si-S-SI

b. Si-c-Si

c. Si(CH3)4

d. Si-O-Si

Correct Answer: d

13. Bleaching action of SO2 is due to:

a. reduction

b. hydrolysis

c. generation

d. oxidation

Correct Answer: d

14. Sulpher is a….. conductor of electricity

a. good

b. moderate

c. best

d. poor

Correct Answer: d

15. Formula of trithonic acid is……..

a. K2S3O6

b. H2S2O7

c. H2S3O6

d. Na2S3O6

Correct Answer: c

16. Sulpher is a major derivative of:

a. acetic aid

b. sodium

c. silicon

d. sulphuric acid

Correct Answer: d

17. silicon is most abundantly exist in nature as

a. silicate

b. graphite

c. diamond

d. silica

Correct Answer: d

18. which one of the following elements does not ehibit allotropy

a. P

b. O

c. S

d. N

Correct Answer: d

19. orthophosphoric acid on heating gives

a. PH3

b. H3PO2

c. P2O3

d. HPO3

Correct Answer: d

20. phoshorous belongs to which group

a. 15 group

b. 14 group

c. 16 group

d. 18 group

Correct Answer: a

21. phosphine is prepared by the action of

a. P with H2SO4

b. P with HNO3

c. P with HCL

d. P with aq. KOH

Correct Answer: d

22. blast on tnt is done by mixing

a. NH4 NO3

b. NH4 NO3

c. (NH4)2 SO4

d. NH4 Cl

Correct Answer: d

23. The most powerful oxidizing agent among halogens is

a. Br2

b. I 2

c. F2

d. Cl2

Correct Answer: c

24. Iodine is not found in nature

a. complex

b. molecular

c. free

d. bounded

Correct Answer: c

25. In halogens not form oxyacids

a. Br

b. I

c. F

d. Cl

Correct Answer: c

26. The halogen which is liquid at room temperature

a. iodine

b. bromine

c. flourine

d. astetine

Correct Answer: b

27. The example of pseudohalogen group is not

a. nitro compounds

b. cyanogen

c. amine group

d. carboxylic acid

Correct Answer: b

28. Noble gases cannot form

a. metallic bond

b. covalent bond

c. coordinate bond

d. ionic bond

Correct Answer: b

29. Xenon has been found to combine with most electronegative

a. boron

b. carbon

c. flourine

d. chlorine

Correct Answer: c

30. The first noble gas compound was

a. XeF6

b. XeO3

c. FeX4

d. Xe+(ptF6)-

Correct Answer: d

31. Xenon hexaflouride at 47.7 C

a. yellow solid

b. colourless solid

c. colourless liquid

d. yellow fluid

Correct Answer: d

32. Inert noble gases placed in group

a. V A

b. IV B

c. VII A


Correct Answer: d

33. For the respiration of sea divers mixture is used

a. Ar & O2

b. Ne & O2

c. Kr & O2

d. He & O2

Correct Answer: d

34. The shape of molecule XeF6 is

a. square planer

b. pentagonal bipyramidal

c. distorted octahedral

d. regular octahedral

Correct Answer: c

35. 4 is the electronegativity value of

a. H

b. Cl

c. F

d. N

Correct Answer: c

36. The shared pair of electron in co-ordinate covalent bond

a. single line

b. an arrow

c. double line

d. an equal sign

Correct Answer: b

37. The shared pair of electron in  a molecule

a. electron pair

b. bonding pair

c. lone pair

d. non bonding pair

Correct Answer: b

38. The second ionization energy is………….than first ionization energy

a. smaller

b. less

c. same

d. higher

Correct Answer: d

39. Ionization energy is the qualitative measurement of……….. of an atom

a. unstability

b. nuclear charge

c. electronic charge

d. stability

Correct Answer: d

40. Minimum energy required to remove an electron from its gaseous atom

a. electron affinity

b. electro negativity

c. sheilding effect

d. ionization energy

Correct Answer: d

41. Electronic concept of acid-base is given by:

a. lowery

b. arhenius

c. joul

d. Lewis

Correct Answer: d

42. The specie that give H ion is:

a. Acid

b. Base

c. Neutral

d. Amphoteric

Correct Answer: a

43. Larger the Pka ——-is the acid:

a. stronger

b. Stable

c. Unstable

d. weaker

Correct Answer: d

44. Conjugate acid of a very strong base is very:

a. weak acid

b. weak base

c. strong acid

d. strong base

Correct Answer: a

45. Common ion suppresses……. effect in blood:

a. acidic

b. basic

c. amphoteric

d. neutral

Correct Answer: a

46. Silicon is most abundantly found in nature as:

a. Ca  silicate

b. silicate

c. Na  silicate

d. silica

Correct Answer: d

47. Shape of diamond crystal is:

a. cubic

b. needle like

c. hexagonal

d. octahedral

Correct Answer: d

48. Coal is the amorphous form of the:

a. calcium

b. carbon

c. iron

d. silicon

Correct Answer: b

49. Carbon is the powerful ……….. Agent:

a. bleaching

b. oxidizing

c. neutrilizing

d. reducing

Correct Answer: d

50. Which one of the following is a bad conductor of electricity:

a. copper

b. silver

c. diamond

d. graphite

Correct Answer: c