(A) Lime solution
(B) Sulphuric acid solution
(C) Sodium chloride solution
(D) Sugar solution
Minst is an example of which solution?
(A) Gas in liquid
(B) Solid in gas
(C) Gas in solid
(D) Liquid in gas
Gases are the lightest form of matter and their densities are expressed in the form of?
(A) mg cm-3
(B) g cm-3
(C) g dm-3
(D) kg dm-3
___ is an electron deficient molecule?
(A) NH3
(B) BF3
(C) N2
(D) O2
C2H2 molecule have ___ covalent bonds.
(A) 2
(B) 3
(C) 4
(D) 5
4th and 5th period of the long form of periodic table are called?
(A) Normal periods
(B) Short periods
(C) Long periods
(D) Very long periods
___ halegen have lowest electronegativity?
(A) Chlorine
(B) Fluorine
(C) Bromine
(D) Iodine
Which cell consists of three sub shells?
(A) L
(B) M
(C) N
(D) O