Q12 / 120 · NTA Abhyas (JEE Main) 2020 · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
Which Of the following orders is correct?
(1) - Boiling Point
(2) - Thermal Stability
(3) - Basic Character
(4) - Bond Angle
(1) - Boiling Point
(2) - Thermal Stability
(3) - Basic Character
(4) - Bond Angle
- A(1), (2) and (3) only
- B(2), (3) and (4) only
- Correct answerC(1), (3) and (4) only
- D(1), (2), (3) and (4).
Solution
(1) has higher boiling point than and on account ‐bonding. has highest boiling point on account of highest molecular weight.
(2) As the size of element increases, the strength of M‐H bond decreases and thus stability decreases.
(3) Basicity decreases down the group. (Drago rule).
(4) HEH angle )
(2) As the size of element increases, the strength of M‐H bond decreases and thus stability decreases.
(3) Basicity decreases down the group. (Drago rule).
(4) HEH angle )
Hence, the correct answer is option: 'C'.