Q). Which one of the following is caused due to “Screening effect”?
A) Increase in Ionisation Energy
B) Increase in Nuclear Charge
C) Decrease in Ionisation Energy
D) Decrease in Atomic Size
Q). The number of d-block elements in the fourth period of the modem periodic table are ………….
A) 6
B) 8
C) 10
D) 18
Q). Which of the following is correct while going down the group in the periodic table?
A) Atomic number increases
B) Number of shells increases
C) Atomic radius increases
D) All the above
Q). Which of the following elements is bigger in size compared to others?
A) K
B) Be
C) B
D) N
Q). The condition for the formation of ionic bond between two atoms
A) Electronegativity difference is greater than 1.9
B) Similar electro positivity
C) Atoms of same size
D) Electronegativity difference is less than 1.9
Q). Which of the following molecules does not obey octet rule?
A) NH3
B) CH4
C) H2O
D) BeCl2
Q). Lateral overlap of orbitals results in the formation of
A) σ – bond
B) Hydrogen bond
C) π – bond
D) Ionic bond
Q). The number of Ione pair electrons present in the valence shell of central atom of water molecule is
A) 2
B) 4
C) 3
D) 1
Q). In which one of the following, bond angle is minimum?
A) BeCl2
B) BF3
C) CH4
D) NH3
Q). Who proposed the ionic bond?
A) Lewis
B) Mosley
C) Pauling
D) Kossel