10th Physical Sciences Objective Multiple Choice Questions

1. Number of elements present in period – 2 of the long form of periodic table.
A) 2 B) 8 C) 18 D) 32

2. Nitrogen (Z = 7) is the element of group V of the periodic table. Which of the
following is the atomic number of the next element in the group?
A) 9 B) 14 C) 15 D) 17

3. Electron configuration of an atom is 2, 8, 7 to which of the following elements
would it be chemically similar?
A) Nitrogen (Z = 7) B) Fluorine (Z = 9)
C) Phosphorous (Z = 15) D) Argon (Z = 18)

4. Which of the following is the most active metal?
A) Lithium B) Sodium C) Potassium D) Rubidium

5. This is not a Dobereiner’s triad.
A) Li, Na, K B) Mn, Cr, Fe C) Cu, Hg, Mg D) S, Se, Te

6. This is a metalloid
A) Copper B) Silicon C) Gold D) Aluminium

7. Newlands periodic table is restricted to only ……….. elements.
A) 46 B) 56 C) 66 D) 36

8. Number of groups in Mendeleev’s periodic table.
A) 6 B) 8 C) 18 D) 32

9. Sub-group I A elements of Mendeleev’s periodic table are called
A) Alkali metals B) Alkali earth metals C) Halogens D) Noble gases

10. Mendeleev’s periodic table has ……….. periods.
A) 8 B) 9 C) 7 D) 14

11. At the time of Robert Boyle, number of elements known are
A) 63 B) 115 C) 91 D) 13

12. By now, including synthetic elements, there are more than ………….. elements.
A) 63 B) 91 C) 115 D) 13

13. Scientist who stated that hydrogen atom is the building material and atoms of all other elements are simply due to the combination of number of hydrogen atoms.
A) Robert Boyle B) Lavoisier
C) Dobereiner D) Joseph Louis Proust

14. Chemist who established the law of triads
A) Dobereiner B) Lavoisier C) Newlands D) Robert Boyle

15. Scientist who was first to assign atomic numbers to elements was
A) Newlands B) Moseley C) Dobereiner D) Mendeleev

16. The scientist who stated the periodic law as ‘the physical and chemical properties of the elements are periodic function of their atomic weights’ was
A) Moseley B) Mendeleev C) Robert Boyle D) Newlands

17. Eka-boron was later found to be
A) Scandium B) Gallium C) Germanium D) Silver

18. Eka-aluminium was later found to be
A) Aluminium B) Scandium C) Germanium D) Gallium

19. Eka- silicon was later found to be
A) Silicon B) Aluminium C) Germanium D) Boron

20. All elements are gases in this group
A) 0 B) I C) IV A D) VII A

21. The elements given below belong to the same period
A) C, N, O B) Ca, In, Sn C) Be, Fe, Co D) Al, Pb, Bi

22. Actinoids belong to ………….. period.
A) 2 B) 7 C) 5 D) 4

23. Group III A (13) elements are called as
A) Halogen family B) Nitrogen family
C) Boron family D) Alkali metals family

24. The inner-transition elements are …………. elements.
A) s-block B) d-block C) p- block D) f-block

25. Ionization increases with ………….
A) more screening effect B) more nuclear charge
C) less penetration power D) more atomic radius


1-B; 2-C; 3-B; 4-D; 5-C; 6-B; 7-B; 8-B; 9-A; 10-C; 11-D; 12-C; 13-D; 14-A; 15-A; 16-B; 17-A; 18-D; 19-C; 20-A; ; 21-A; 22-B; 23-C; 24-D; 25-B.

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