MCQ
Sum of number of $\alpha$ -hydrogen present is compound $A + B$ is
- A$18$
- B$19$
- ✓$20$
- D$21$
✓
Answer
Correct option: C.
$20$
c
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Choose the correct statement($s$) among the following.
→$(A)$ $SnCl _2 \cdot 2 H _2 O$ is a reducing agent.
$(B)$ $SnO _2$ reacts with $KOH$ to form $K _2\left[ Sn ( OH )_6\right]$.
$(C)$ A solution of $PbCl _2$ in $HCl$ contains $Pb ^{2+}$ and $Cl ^{-}$ions.
$(D)$ The reaction of $Pb _3 O _4$ with hot dilute nitric acid to give $PbO _2$ is a redoxreaction.
Which of the following compound have magnetic moment $\sqrt {15}\, B.M.$ ?
→The correct statement($s$) about the following reaction sequence is(are)
→(image)
($A$) $R$ is steam volatile
($B$) $Q$ gives dark violet coloration with $1 \%$ aqueous $FeCl_3$ solution
($C$) $S$ gives yellow precipitate with $2, 4$-dinitrophenylhydrazine
($D$) $S$ gives dark violet coloration with $1 \%$ aqueous $FeCl_3$ solution
$\,$
→$\begin{array}{*{20}{c}}
{\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{C{H_3} - C - C{H_2} - \mathop C\limits^ \oplus {H_2}} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array} \to \begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,\,C{H_3}} \\
{\,\,\,\,\,\,|} \\
{C{H_3} - \mathop C\limits^ \oplus - CH - C{H_3}} \\
{\,\,\,\,\,\,|} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}}
\end{array}$
→{\,C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{C{H_3} - C - C{H_2} - \mathop C\limits^ \oplus {H_2}} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array} \to \begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,\,C{H_3}} \\
{\,\,\,\,\,\,|} \\
{C{H_3} - \mathop C\limits^ \oplus - CH - C{H_3}} \\
{\,\,\,\,\,\,|} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}}
\end{array}$
How many ${H^ \ominus }$ shifts are involved in above rearrangement :
The reaction of $4$-methyloct-ene $P, 2.52 \mathrm{~g})$ with $\mathrm{HBr}$ in the presence of $\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CO}_2\right)_2 \mathrm{O}_2$ gives two isomeric bromides in a $9: 1$ ratio, with combined yield of $50 \%$. Of these, the entire amount of the primary alkyl bromide was reacted with an appropriate amount of diethylamine followed by treatment with eq. $\mathrm{K}_2 \mathrm{CO}_3$ to given a non-ionic product $\mathrm{S}$ in $100 \%$ yield.
→The mass (in $\mathrm{mg}$ ) of $\mathrm{S}$ obtained is. . . . . . . [Use molar mass (in g mol ${ }^{-1}$ ) : $\mathrm{H}=1, \mathrm{C}=12, \mathrm{~N}=14, \mathrm{Br}=80$ ]
Aromatic primary amine when treated with cold $HN{O_2}$ gives
→$4.0\,moles$ of argon and $5.0\, moles$ of $PCI _{5}$ are introduced into an evacuated flask of $100\, litre$ capacity at $610\, K$. The system is allowed to equilibrate. At equilibrium, the total pressure of mixture was found to be $6.0 \,atm$. The $K _{ p }$ for the reaction is ...... [Given : $R=0.082 \,L \,atm\, K ^{-1}\, mol ^{-1}$ ]
→At $527\,^{\circ} C$ temperature the activation energy is $54.7 \,KJ / mole$ The value of Arrhenius factor is $4 \times 10^{10} .$ The rate constant will be
→Which of the following is in correctly matched complex ?
Complex || Oxidation and number || Electronic configuration