At low temperature, the slow addition of molecular bromine to ${{\rm{H}}_2}{\rm{C}} = {\rm{CH}}-{\rm{C}}{{\rm{H}}_2}-{\rm{C}} \equiv {\rm{CH}}$ gives:

Addition of HBr first takes place round double bond.

${\rm{C}}{{\rm{H}}_2} = {\rm{CH}}-{\rm{C}}{{\rm{H}}_2}-{\rm{CBr}} = {\rm{CHBr}}$

${\rm{BrC}}{{\rm{H}}_2}-{\rm{CHBr}}-{\rm{C}}{{\rm{H}}_2}-{\rm{C}} \equiv {\rm{CH}}$

The correct Option is "${{\rm{H}}_2}{\rm{C}} = {\rm{CH}}-{\rm{C}}{{\rm{H}}_2}-{\rm{C}}{{\rm{H}}_2}-{\rm{CB}}{{\rm{r}}_3}$"

${\rm{C}}{{\rm{H}}_3}-{\rm{CB}}{{\rm{r}}_2}-{\rm{C}}{{\rm{H}}_2}-{\rm{C}} \equiv {\rm{CH}}$

The ease of hydrolysis with an alkali in the compounds $\begin{array}{l} {\rm{C}}{{\rm{H}}_3}{\rm{COClC}}{{\rm{H}}_3}\;{\rm{CO}} - {\rm{O}} - {\rm{COC}}{{\rm{H}}_3}\\ \;I\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;II\\ {\rm{C}}{{\rm{H}}_3}{\rm{COO}}{{\rm{C}}_2}{{\rm{H}}_5}{\rm{C}}{{\rm{H}}_3}{\rm{CON}}{{\rm{H}}_2}\\ \;III\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;IV \end{array}$ Is of the order

The order of the acidic characters of acid derivative or their ease of hydrolysis with alkali is given below : ${\rm{C}}{{\rm{H}}_3}{\rm{COCl}} > {\rm{C}}{{\rm{H}}_3}{\rm{CO}} - {\rm{O}} - {\rm{COC}}{{\rm{H}}_3} > C{{\rm{H}}_3}{\rm{COO}}{{\rm{C}}_2}{{\rm{H}}_5} > C{{\rm{H}}_3}{\rm{CON}}{{\rm{H}}_2}$

The correct Option is "I>II>III>IV"

Fluorescein is an example of

Fluorescein is an example of phthalein dye.

The correct Option is "Phthalein dyes"

Silver chloride dissolves in excess of $N{H_3}$ solution. The cation present in solution is

$AgCl + 2N{H_3} \to {\left[ {Ag{{\left( {N{H_3}} \right)}_2}} \right]^ + }C{l^ - }$

${\left[ {Ag{{(N{H_3})}_4}} \right]^ + }$

The correct Option is "${\left[ {Ag{{(N{H_3})}_2}} \right]^ + }$"

${\left[ {Ag{{(N{H_3})}_6}} \right]^ + }$

Which one is correct?

In the molarity and normality the volume of the solution is considered while in molality the mass of the solvent is considered. Molarity and normality change with temperature because of expansion of contraction of the liquid with temperature. However, molality does not change with temperature because mass of the solvent does not change with temperature.

Molality changes with temperature.

The correct Option is "Molality does not change with temperature."

Molarity does not change with temperature.

Normality does not change with temperature.

A fruity smell is obtained by the reaction of ethanol with

Alcohol (${{\rm{C}}_2}{{\rm{H}}_5}{\rm{OH}}$) when react with acid they produce ester and esters have fruity smell.

${\rm{C}}{{\rm{H}}_3}{\rm{COC}}{{\rm{H}}_3}$

The correct Option is "${\rm{C}}{{\rm{H}}_3}{\rm{COOH}}$"

${\rm{C}}{{\rm{H}}_3}{\rm{CHO}}$

Which of the following is not a disproportion atom reaction

Fluorine does not show disproportionation as it cannot exhibit any positive oxidation state.

$C{l_2} + O{H^ - } \to C{l^ - } + Cl{O^ - }_3 + {H_2}O$

${P_4} + O{H^ - } + {H_2}O \to P{H_3} + {H_2}P{O^ - }_2$

${S_8} + O{H^ - } \to 4{S^2}^ - + 2\,{S_2}{O_3}^{2 - } + 6{H_2}O$

The correct Option is "${F_2} + O{H^ - } \to {F^ - } + O{F_2} + {H_2}O$"

The electric configuration of element with atomic number 24 is

The electronic configuration of element with atomic number 24 is $1{s^2},\;2{s^2},2{p^6},3{s^2},3{p^6},4{s^1},3{d^5}$ , (∵Exactly half-filled orbitals are more stable than nearly half-filled orbitals.)