Q). Quantum theory was proposed by
A) Sommerfeld
B) Niels Bohr
C) Max Planck
D) Lande
Q). Which of the following groups of elements has ns2 electronic configuration?
A) Alkali metals
B) Alkali earth metals
C) Halogens
D) Chalcogens
Q). The general electronic configuration of noble gases is
A) ns1
B) ns2
C) ns2 np6
D) ns2 np3
Q). The longest period in the modern periodic table is
A) 7th
B) 6th
C) 5th
D) 4th
Q). Which among the following elements has the highest electronegativity?
A) Cl
B) F
C) Br
D) I
Q). Law of octaves was proposed by
A) Dobereiner
B) Newlands
C) Niels Bohr
D) Mendeleeff
Q). Ionic compounds are soluble in
A) kerosene
B) benzene
C) water
D) ether
Q). The number of covalent bonds in methane is
A) 1
B) 2
C) 3
D) 4
Q). Which of the following elements forms a unipositive ion?
A) Mg
B) Al
C) Ca
D) Na
Q). Which of the following anions has Ne electronic configuration?
A) Cl–
B) O2-
C) P3-
D) Br–
Good