MCQ
Conjugate base of $N{H_3}$ is
- A$NH_4^ \oplus $
- B$NH_2^ \oplus $
- ✓$NH_2^\Theta $
- D${N_2}$
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$(i)\, [Xe]\,6s^1$
$(ii)\, [Xe]\,4f^{14}5d^16s^2$
$(iii)\, [Ne]\,3s^23p^5$
$(iv)\, [Ar]\,3d^74s^2$
Which one of the following statements about these elements is not true ?
Assertion $A$: Amylose is insoluble in water.
Reason $R$: Amylose is a long linear molecule with more than $200$ glucose units.
In the light of the above statements, choose the correct answer from the options given below.
$PhCHO + Ph \cdot CHO \xrightarrow[in\,\,{{D}_{2}}O]{NaOD} A + \begin{matrix} O \\ || \\ Ph-C-{{O}^{-}} \\ \end{matrix}$$\left( Ph\right.$ is $\left.- C _{6} H _{5}\right)$