MCQ
The $IUPAC$ name of${(C{H_3})_2}CH - C{H_2} - C{H_2}Br$ is
- A$1-$ bromo pentane
- B$2-$ methyl and $4$ bromo butane
- ✓$1-$ bromo and $3-$ methyl butane
- D$2-$ methyl and $3$ bromo propane
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Assertion $A$ :Magnesium can reduce $Al _{2} O _{3}$ at a temperature below $1350^{\circ} C$, while above $1350^{\circ} C$ aluminium can reduce $MgO$.
Reason $R$ : The melting and boiling points of magnesium are lower than those of aluminium.
In light of the above statements. choose most appropriate answer from the options given below
$(1)$ Denaturation of proteins causes loss of secondary and tertiary structures of the protein.
$(2)$ Denaturation leads to the conversion of double strand of $DNA$ into single strand.
$(3)$ Denaturation affects primary structure which gets distorted.
$\,\begin{array}{*{20}{c}}
{\,C{H_3} - \,CH - \,CH = C{H_2}\,\xrightarrow{{B{r_2}/aq.NaCl}}} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}$