Practice Objective questions set 4 - general science mcq Online Quiz (set-1) For All Competitive Exams
Q-1) Which of the following is not a representative element?
(a)
(b)
(c)
(d)
Fe is a transition element.
Q-2) The element which has least tendency to lose electron is
(a)
(b)
(c)
(d)
He is an inert gas.
Q-3) Which one of the following elements is a metalloid?
(a)
(b)
(c)
(d)
Q-4) The most metallic element in the fourth period is
(a)
(b)
(c)
(d)
The fourth period contains elements with atomic numbers 19 to 36.
K (Z = 19) is the first member and so it is the most metallic.
Q-5) What form of energy is produced in the decomposition of water?
(a)
(b)
(c)
(d)
Q-6) Which one of the following elements exhibit maximum number of valence electrons?
(a)
(b)
(c)
(d)
P is in group 5 and has 5 valence electrons.
The number of valence electrons in Na, Al and Si are 1, 3 and 4.
Q-7) If a limestone piece is dipped in water, a bubble evolves. The bubbling is due to
(a)
(b)
(c)
(d)
Q-8) As you move down the group, the alkali metals become
(a)
(b)
(c)
(d)
Q-9) The element with smallest size in group 13 is
(a)
(b)
(c)
(d)
In group 13, boron is above aluminium. Rest of elements not belong to group 13.
Q-10) If the two members of a Dobereiner triad are phosphorus and antimony, the third member of this triad is –
(a)
(b)
(c)
(d)