All MCQs are solved with their correct answers.
1. Most of the elements are
a) Crystalloids b) Metals
c) Metalloids d) Non-metals
2. The decrease in atomic sizes is not much prominent across rows containing elements of
a) s-block b) p-block
c) d-block d) f-block
3. 6th period contains the number of elements:
a) 18 b) 32
c) 8 d) 10
4. Which element forms an ion with charge + 3:
a) Chromium b) Copper
c) Lead d) Zinc
5. The number of groups in the modern periodic
table is
a) 8 b) 7
c) 6 d) 5
6. In the periodic table all the non-metals are
placed under which of the blocks.
a) f b) d
c) P d) s
7. Which of the following elements react with
steam only?
(a) Na (b) Mg
(c) K (d) Ca
8. Which of the following has the smallest size?
(a) Al (b) Al+
(c) Al++ (d) Al+++
9. Which of the following set of elements is not transition elements?
(a) Ti, Zn, Hf (b) Cu, Ag, Au
(c) Ga, ln, Tl (d) Ni, Pt, Pd
10. Which of the following is the strongest base?
(a) NH3 (b) PH3
(c) AsH3 (d) SbH3
11. Which pair of atomic numbers represent s-
block elements?
(a) 7, 15 (b) 6, 12
(c) 9, 17 (d) 3, 12
12. 6th period contains transition elements:
(a) 2 (b) 8
(c) 16 (d) 24
13. Which of the following properties increases
up to the middle of the period and then
decreases?
(a) Ionization energy
(b) Atomic radii
(c) Melting and boiling point
(d) Atomic volume
14. Which of the following has the highest melting
point?
(a) NaCl (b) KCl
(c) RbCl (d) CsCl
15. Which of the following is less basic?
(a) MnO (b) MnO2
(c) Mn2O3 (d) Mn2O7
16. 7th period of the periodic table contains
normal elements:
(a) 2 (b) 3
(c) 4 (d) 8
17. Magnesium is present in
(a) Ascorbic acid (b) Cyanocobaltamine
(c) Chlorophyll (d) Haemoglobin
18. What is the composition of Witherite?
(a) BaSO4 (b) BaCO3
(c) SrSO4 (d) Na2CO3.10H2O
19. Which one of the following is not an alkali
metal?
(a) Fr (b) Cs
(c) Rb (d) Ra
20. Beryllium metal is as hard as:
(a) Fe (b) Cu
(c) Zn (d) Diamond
21. Which metal is used in the Thermite process
because of its activity?
(a) Iron (b) Copper
(c) Aluminium (d) Zinc
22. Aluminium oxide is:
(a) Acidic oxide
(b) Basic oxide
(c) Amphoteric oxide
(d) none of these
23. Chemical composition of colemanite is:
(a) Ca2B6O11.5H2O
(b) CaB4O7.4H2O
(c) Na2B4O7.4H2O
(d) CaNaB5O9.8H2O
24. Which element forms an ion with charge +3?
(a) Beryllium (b) Aluminium
(c) Carbon (d) Silicon
25. Sodium has an atomic number
(a) 9 (b) 11
(c) 8 (d) 12