101)Order of energy of orbitals
A) 3s >3p> 3d>4s
B) 3s<3p<3d <4s
C) 3s >3p> 4s>3d
D) 3s<3p<4s<3d
102)The total number of atomic orbitals in third shell of an atom
C) 9
Explanation:Third shell (n = 3) → s, p, d → 1 + 3 + 5 = 9 orbitals
103)Which is the least electronegative element among the following?
A) Lithium
B) Carbon
C) Nitrogen
D) Fluorine
104)4f elements are called as
A) Transition elements
B) Alkaline earth metals
C) Actinoids
D) Lanthonoids
105)The element which belong to 3rd period and 14th group in modern periodic table
A) Aluminium
B) Silicon
C) Phosphorous
D) Sulphur
106)The orbital with more penetration power towards nucleus is
107)The electronic configuration of an element is 2,8,6 which one of the following element is chemically similar to the above element?
A) Nitrogen
B) Oxygen
C) Phosphorous
D) chlorine
108)Which of the following pair of atomic numbers indicates the s-block elements?
A) 5,6
B) 9,10
C) 11,12
D) 7,8
109)Identify the salt in the following
A) NaCl
B) NaOH
C) HCI
D) HCN
110)Solution with pH less than 7 is
A) Sodium chloride solution
B) Sodium hydroxide solution
C) Acetic acid solution
D) Slaked line
C) Acetic acid solution
Explanation:pH < 7 = acidic → only acetic acid solution
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