Online Test of Chapter 5 Periodic Classification of Elements MCQ Science| Class 10th

Question :-

1. How many elements are present in the periodic table?
(a) 101
(b) 112
(c) 117
(d) 118

2. Newland’s rule known as_________
(a) Law of triads
(b) Law of octaves
(c) Law of periodic table
(d) None of these

3. Newland’s law of octaves based upon __________
(a) Increasing order of atomic number
(b) Increasing order of atomic mass
(c) Increasing order of electron
(d) None of these

4.Newland’s law of octaves is applicable up to _________
(a) Sodium
(b) Magnesium
(c) Calcium
(d) Sulphur

5. Mendeleev’s periodic table is based on ___________
(a) Atomic number
(b) Atomic weight
(c) Equivalent weight
(d) None of these

6. The two places left empty by Mendeleev in the periodic table are
(a) Aluminum and silicon
(b) Gallium and germanium
(c) Arsenic and antimony
(d) Antimony and bismuth

7. Gallium was named by Mendeleev as
(a) Eka-aluminium
(b) Eka-silicon
(c) Eka-germanium
(d) Eka-zinc

8. Which element was named Eka-silicon in Mendeleev s classification of elements?
(a) Germanium
(b) Gallium
(c) Indium
(d) Thallium

9. Modern periodic table is based on ____________
(a) Atomic number
(b) Atomic weight
(c) Equivalent weight
(d) None of these

10. How many vertical columns or groups are present in the modern periodic table?
(a) 15
(b) 17
(c) 16
(d) 18

[WpProQuiz 784]