Question:
Which among the following hydrides has low bond dissociation energy of M–H bond (M = central atom)?
Which among the following hydrides has low bond dissociation energy of M–H bond (M = central atom)?
Show Hint
Weaker bonds are formed when larger atoms are involved due to poor orbital overlap.
Updated On: Feb 11, 2026
- H\(_2\)Se
- H\(_2\)S
- H\(_2\)Te
- H\(_2\)O
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understand bond dissociation energy trend.
Bond dissociation energy decreases as bond length increases.
Step 2: Analyze group 16 hydrides.
Down the group from oxygen to tellurium, atomic size increases and M–H bond length increases.
Step 3: Compare given hydrides.
\[ \text{O–H}>\text{S–H}>\text{Se–H}>\text{Te–H} \]
Thus, H\(_2\)Te has the weakest M–H bond.
Step 4: Conclusion.
H\(_2\)Te has the lowest bond dissociation energy.
Bond dissociation energy decreases as bond length increases.
Step 2: Analyze group 16 hydrides.
Down the group from oxygen to tellurium, atomic size increases and M–H bond length increases.
Step 3: Compare given hydrides.
\[ \text{O–H}>\text{S–H}>\text{Se–H}>\text{Te–H} \]
Thus, H\(_2\)Te has the weakest M–H bond.
Step 4: Conclusion.
H\(_2\)Te has the lowest bond dissociation energy.
Was this answer helpful?
0
0
Top MHT CET Chemistry Questions
- The temperature of $32^{\circ}C$ is equivalent to
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
- If a metal crystallises in bcc structure with edge length of unit cell $4.29 \times 10^{-8}\, cm$ the radius of metal atom is
- Which of the following oxides can act both as an oxidising agent as well as reducing agent ?
- "The mass and energy both are conserved in an isolated system", is the statement of
View More Questions
Top MHT CET Alcohols, Phenols and Ethers Questions
- Propene when treated with cold conc. $H_{2}SO_{4}$ forms a compound which on heating with water gives
- First organic compound to be synthesised was_______.
Which of the following is not the method of preparation of phenol?
Which among the following is not a characteristic of alcohols?
What is the product formed when CH3–CH=CH2 is treated with B2H6 followed by the action of H2O2?
View More Questions
Top MHT CET Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- The temperature of $32^{\circ}C$ is equivalent to
- The line $5x + y - 1 = 0$ coincides with one of the lines given by $5x^2 + xy - kx - 2y + 2 = 0 $ then the value of k is
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
View More Questions