Problem 1
The element with atomic number 12 belongs to ......... group and \(\ldots \ldots \ldots .\) period. (a) IA, third (b) IIIA third (c) IIA, third (d) IIA, second
Problem 2
An element having atomic number 56 belongs to: (a) Lanthanides (b) Actinides (c) Alkaline earth metals (d) None of these
Problem 3
The maximum valency of an element having atomic number seven is: (a) (b) 3 (c) 5 (d) 7
Problem 4
The number of elements present in the fifth period of periodic table is: (a) 10 (b) 8 (c) 32 (d) 18
Problem 5
An example of amphoteric oxide is: (a) \(\mathrm{Ti}_{2} \mathrm{O}_{2}\) (b) \(\mathrm{MgO}\) (c) \(\mathrm{Cl}_{2} \mathrm{O}_{7}\) (d) \(\mathrm{Al}_{2} \mathrm{O}_{3}\)
Problem 6
The elements with atomic numbers \(9,17,35,53\) and \(85 .\) (a) Noble gases (b) Light metals (c) Halogens (d) Heavy metals
Problem 7
Which one of the following is a metalloid? (a) Phosphorus (b) Antimony (c) Nitrogen (d) Bismuth
Problem 8
The correct order of atomic radii is: (a) \(\mathrm{F}<\mathrm{K}<\mathrm{Na}<\mathrm{Li}\) (b) \(\mathrm{Li}<\mathrm{Na}<\mathrm{K}<\mathrm{F}\) (c) \(\mathrm{F}<\mathrm{Li}<\mathrm{Na}<\mathrm{K}\) (d) \(\mathrm{Na}<\mathrm{K} \leq \mathrm{Li}<\mathrm{F}\)
Problem 9
Which one of the following is an amphoteric oxide? (a) \(\mathrm{ZnO}\) (b) \(\mathrm{Na}_{2} \mathrm{O}\) (c) \(\mathrm{SO}_{2}\) (d) \(\mathrm{B}_{2} \mathrm{O}_{3}\)
Problem 10
Which of the following oxides is most basic? (a) \(\mathrm{Bi}_{2} \mathrm{O}_{3}\) (b) \(\mathrm{SeO}_{2}\) (c) \(\mathrm{Al}_{2} \mathrm{O}_{3}\) (d) \(\mathrm{Sb}_{2} \mathrm{O}_{3}\)
