(D) Vitamin $B_{12}$,also known as cyanocobalamin,contains a cobalt $(Co)$ ion at its center,not magnesium $(Mg^{2+})$. Therefore,the statement in opt

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Vitamin $B_{12}$ contains $Mg^{2+}$ ion.

(D) Vitamin $B_{12}$,also known as cyanocobalamin,contains a cobalt $(Co)$ ion at its center,not magnesium $(Mg^{2+})$. Therefore,the statement in option $D$ is incorrect.

Class 12 Chemistry Biomolecules Vitamins

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Which of the following statements is incorrect?

A
Chlorophyll is responsible for the synthesis of carbohydrates in plants.
B
The compound formed by the addition of oxygen to hemoglobin is called oxyhemoglobin.
C
Acetylsalicylic acid is known as aspirin.
D
Vitamin $B_{12}$ contains $Mg^{2+}$ ion.

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Biomolecules

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Vitamins

Pick the wrong statement from the following :

EasyKCET 2017

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Match the following vitamins with their sources and the corresponding diseases caused by their deficiency.
Vitamins Sources and Diseases
$(A)$ $Vitamin-B_1$ $(i)$ Egg-whites,$(p)$ Convulsions
$(B)$ $Vitamin-B_2$ $(ii)$ Fish,$(q)$ Pernicious anemia
$(C)$ $Vitamin-B_6$ $(iii)$ Green vegetables,$(r)$ Cheilosis
$(D)$ $Vitamin-B_{12}$ $(iv)$ Grams,$(s)$ Beri-Beri

Vitamins	Sources and Diseases
$(A)$ $Vitamin-B_1$	$(i)$ Egg-whites,$(p)$ Convulsions
$(B)$ $Vitamin-B_2$	$(ii)$ Fish,$(q)$ Pernicious anemia
$(C)$ $Vitamin-B_6$	$(iii)$ Green vegetables,$(r)$ Cheilosis
$(D)$ $Vitamin-B_{12}$	$(iv)$ Grams,$(s)$ Beri-Beri

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