MCQ
Which of following is the incorrect match?
- AInsulin $-$ Zinc
- BHaemoglobin $-$ Iron
- CVitamin $\mathrm{B}_{12}-$ Cobalt
- ✓Chlorophyll $-$ Chromium
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Reason : The concentration of salt content in the cells increases.
Reason : It is the mechanism and not the balanced chemical equation for the overall change that governs the reaction rate.
What is structure of $(A)$ ?
The original compound showed these properties also :
$\mathop {{C_9}{H_{12}}{O_2}}\limits_{(A)} \,\xrightarrow{{Na}}\,{H_2}$ liberated
$\mathop {{C_9}{H_{12}}{O_2}}\limits_{(A)} \,\xrightarrow{{Br}}$ no rapid reaction
$\mathop {{C_9}{H_{12}}{O_2}}\limits_{(A)} \,\xrightarrow[{cool}]{{Cr{O_3}\,/\,{H^ + }}}{C_9}{H_8}{O_3}$