Inorganic Chemistry – Old Year Questions

1. UNESCO inaugurated the celebration of 2019 as the International Year of the Periodic Table of Chemical Elements to celebrate its completion of how many years?

(a) 100
(b) 150
(c) 75
(d) 50
(e) None of the above/More than one of the above

[65th B.P.S.C. (Pre) 2019]


2. Assertion (A): In the periodic table of chemical elements, electron affinity is always found to increase from top to bottom in a group. Reason (R): In a group, the atomic radii generally increase from top to bottom.

(a) Both (A) and (R) are individually true, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are individually true, but R is not the correct explanation of (A).
(c) (A) is true but (R) is false.
(d) (A) is false but (R) is true.

[I.A.S. (Pre) 2003]


3. Consider the following statements with reference to the periodic table of chemical elements :
1. Ionization potential gradually decreases along a period
2. In a group of elements, electron affinity decreases as the atomic weight increases
3. In a given period, electronegativity decreases as the atomic number increases
Which of these statement (s) is/are correct?

(a) 1 only
(b) 2 only
(c) 1 and 3
(d) 2 and 3

[I.A.S. (Pre) 2001]


4. What is the usual property of oxides of Groups 3 and 4?

(a) Basic and Acidic
(b) Basic
(c) Acidic
(d) Neutral

[43rd B.P.S.C. (Pre) 1999]


5. The element found maximum in the soil layer is –

(a) Oxygen
(b) Nitrogen
(c) Manganese
(d) Silicon

[42nd B.P.S.C. (Pre) 1997]


6. Which one of the following is present in the largest amount in terms of percent by mass in the earth’s crust?

(a) Silicon
(b) Oxygen
(c) Carbon
(d) Calcium

[I.A.S. (Pre) 1997]


7. Which is the most abundant element after Oxygen?

(a) Silicon
(b) Carbon
(c) Sodium
(d) Chlorine

[M.P.P.C.S. (Pre) 2005]


8. Which of the following is the most common element in the Universe?

(a) Hydrogen
(b) Oxygen
(c) Nitrogen
(d) Carbon

[U.P.P.C.S. (Pre) 2007] 


9. Approximately how many different chemical elements exist on the earth?

(a) 300
(b) 250
(c) 200
(d) 100

[R.A.S./R.T.S. (Pre) 2003]


10. Which of the following is a fundamental element :

(a) Sand
(b) Diamond
(c) Marble
(d) Sugar

[U.P.P.C.S. (Pre) 1995]


11. The chemical composition of a diamond is?

(a) Carbon
(b) Nitrogen
(c) Nickel
(d) Zinc

[Uttarakhand P.C.S. (Pre) 2007]


12. Which of the following is not a type of element?

(a) Metals
(b) Nonmetals
(c) Gases
(d) Metalloids
(e) None of the above/More than one of the above

[65th B.P.S.C. (Pre) 2019]


13. Which of the following elements was first produced artificially?

(a) Neptunium
(b) Plutonium
(c) Francium
(d) Technetium

[Jharkhand P.C.S. (Pre) 2013]