Q1) Which of the following forms the basis of the modern periodic table?
a) Atomic mass
b) Atomic number
c) Number of nucleons
d) All of the above
Correct Answer: Option (b)
Q2) Which of the following is the most reactive element of group 17?
a) Oxygen
b) Sodium
c) Fluorine
d) Magnesium
Correct Answer: Option (c)
Q3) Which of the following is the correct order of the atomic radii of the elements oxygen, fluorine and nitrogen?
a) O < F < N
b) N < F < O
c) O < N < F
d) F < O < N
Correct Answer: Option (d)
Q4) Element X forms a chloride with the formula XCl2, which is solid with a high melting point. X would most likely be in the same group of the Periodic Table as:
a) Na
b) Mg
c) Al
d) Si
Correct Answer: Option (b)
Q5) What happens to the electropositive character of elements on moving from left to right in a periodic table?
a) Increase
b) Decreases
c) First increases, then decreases
d) First decreases, then increases
Correct Answer: Option (b)