(A) Groups
(B) Rows
(C) Blocks
(D) Periods
Who gave the concept of Atom’s orbit?
(A) Neil Bohr
(B) Rutherford
(C) J.J. Thomson
(D) None of the above
What is the symbol of Barium?
(A) Bi
(B) Br
(C) B
(D) Ba
Which metal gives golden yellow flame on burning in air?
(A) Calcium
(B) Sodium
(C) Iron
(D) Magnesium
Formation of water from hydrogen and oxygen is called which type of reaction?
(A) Redox chemical reaction
(B) Acid-Base chemical reaction
(C) Neutralization
(D) None of the above
Spontaneous chemical reaction takes place in?
(A) Electrolytic cell
(B) Galvanic cell
(C) Nelson cell
(D) Downs cell
Solution contains more water?
(A) 0.5 M
(B) 1 M
(C) 2 M
(D) 0.25 M
Triple covalent bond involves ___ electrons.
(A) 2
(B) 4
(C) 5
(D) 6