Coordination compounds have great importance in biological systems. In this context,which of the following statements is incorrect?
- ACyanocobalamin is $B_{12}$ and contains cobalt.
- BHaemoglobin is the red pigment of blood and contains iron.
- CChlorophylls are green pigments in plants and contain calcium.
- DCarboxypeptidase-$A$ is an enzyme and contains zinc.
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If the parametric equations of the circle passing through the points $(3,4), (3,2)$ and $(1,4)$ are $x=a+r \cos \theta$ and $y=b+r \sin \theta$,then find the value of $b^a r^a$.
What is $X$ in the following reaction?
$2 CH_3COCH_3 \stackrel{Ba(OH)_2}{\longrightarrow} X$
$2 CH_3COCH_3 \stackrel{Ba(OH)_2}{\longrightarrow} X$
$y=\log \left\{\left(\frac{1+x}{1-x}\right)^{1 / 4}\right\}-\frac{1}{2} \tan ^{-1}(x)$, then $\frac{d y}{d x}$ is equal to
The gametophyte is not an independent,free-living generation in
Assertion $(A)$: Propagation of light through an optical fibre is due to total internal reflection taking place at the core-clad interface.
Reason $(R)$: Refractive index of the material of the core of the optical fibre is greater than that of air.
Reason $(R)$: Refractive index of the material of the core of the optical fibre is greater than that of air.
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