(A) Benzene
(B) Ether
(C) Petrol
(D) Water
What is the density of iron?
(A) 17.86 g cm-3
(B) 7.86 g cm-3
(C) 27.86 g cm-3
(D) 2.70 g cm-3
___ is an electron deficient molecule.
(A) BF3
(B) N2
(C) O2
(D) NH3
Atomic radius of Carbon is?
(A) 77 pm
(B) 88 pm
(C) 113 pm
(D) 75 pm
___ halogen has the lowest electronegativity.
(A) Chlorine
(B) Bromine
(C) Iodine
(D) Flourine
Electrons can revolve only in those orbits which have fixed angular momentum?
(A) mvr=[2nh/3Π]
(B) mvr=[2nh/Π]
(C) mvr=[nh/2Π]
(D) mvr=[nh/Π]
One gram molecule of H2 is?
(A) 1.008 gram
(B) 2 gram
(C) 1 gram
(D) 1.8 gram
Symbol of Potassium is?
(A) P
(B) Ag
(C) Hg
(D) K