MCQ
Arrange these compounds in decreasing order of basic strength
- A$(i) > (ii) > (iii) > (iv)$
- B$(ii) > (iii) > (i) > (iv)$
- ✓$(iv) > (i) > (iii) > (ii)$
- D$(iv) > (i) > (ii) > (iii)$
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$X + \frac{1}{2}{O_2}\,\, \to \,\,XO + 90.8\,kJ$
It follows that the heat of reaction for the following process $M + XO$ $\rightleftharpoons$ $MO + X$ is given by......$kJ$
Assertion $(A) :$ Metallic character decreases and non-metallic character increases on moving from left to right in a period.
Reason $(R)$ $:$ It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.
In the light of the above statements, choose the most appropriate answer from the options given below :