Arrange the given alkanes in increasing order of their boiling points.
(A) 2, 2-dimethylpropane
(B) 2-methylbutane
(C) n-pentane
(D) n-butane
$D< A< B< C$
$C< A< B< D$
$D< C< B< A$
$A< B< C< D$
Which of the following does not correctly represent the order of the property indicated against it?
$T i< V< C r< M n$ [Increasing order of melting point]
$\mathrm{Ti}^{3+}<\mathrm{V}^{3+}<\mathrm{Cr}^{3+}<\mathrm{Mn}^{3+}$ [Increasing order of magnetic moment]
$T i< V< M n< C r$ [Increasing order of second ionisation enthalpy]
$T i< V< C r< M n$ [Increasing order of highest oxidation state]
According to Molecular orbital theory, which of the following is correct with respect to bond order?
Bond order of $\mathrm{N}_2^{+}$is less than $\mathrm{O}_2$ while that of $\mathrm{O}_2^{+}$is more than $\mathrm{O}_2$.
Bond order of $\mathrm{N}_2^{+}$is less than $\mathrm{N}_2$ while that of $\mathrm{O}_2^{+}$is more than $\mathrm{O}_2$.
Bond order of $\mathrm{N}_2^{+}$and $\mathrm{O}_2^{+}$is less than $\mathrm{O}_2$
Bond order of $\mathrm{N}_2^{+}$and $\mathrm{O}_2^{+}$is more than $\mathrm{N}_2$
$$ \text { Match the characteristic from Col. I with the Vitamins given in Col. II. } $$
| $$ \text { Characteristics } $$ |
$$ \text { Vitamins } $$ |
||
|---|---|---|---|
| A | Water soluble that is not excreted easily | W | $$ \mathrm{B}_2 $$ |
| B | Prevents Cheilosis | X | $$ \mathrm{B}_6 $$ |
| C | Fat soluble | Y | $$ \mathrm{B}_12 $$ |
| D | Prevents seizures and convulsions | Z | E |
$$ \begin{array}{llll} A-X & B-Z & C-W & D-Y \end{array} $$
$$ \begin{array}{llll} A-Z & B-Y & C-X & D-W \end{array} $$
$$ \begin{array}{llll} A-X & B-Y & C-Z & D-W \end{array} $$
$$ \begin{array}{llll} A-Y & B-W & C-Z & D-X \end{array} $$
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