Which of the following relation is incorrect - Vidyadip

MCQ

Which of the following relation is incorrect

A
$1\, mol\, N^{-3} \,ions$ have $10\, mol$ electrons
✓
$1 \,mol\, O^{-2}\, ions$ have $6.023 \times 10^{22}$ electrons
C
$1\, mole\, CH_4$ has $10\, mol$ protons
D
$1 \,mole$ water has $10\, mol$ protons

✓

Answer

Correct option: B.

$1 \,mol\, O^{-2}\, ions$ have $6.023 \times 10^{22}$ electrons

b
$1\, \mathrm{mol} \,\mathrm{N}^{-3}$ ion $\rightarrow 1 \times 10\, \mathrm{mol} \,\mathrm{e}^{-}$

$1 \,\mathrm{mol}\, \mathrm{O}^{-2}$ ion $\rightarrow 1 \times 10\, \mathrm{mol}\, \mathrm{e}^{-}=6.023 \times 10^{24} \,\mathrm{e}^{-}$

$1\, \mathrm{mol}\, \mathrm{CH}_{4} \Rightarrow 1 \times 10 \,\mathrm{mol}$ protons

$1 \,\mathrm{mol} \,\mathrm{H}_{2} \mathrm{O} \Rightarrow 1 \times 10\, \mathrm{mol}$ protons

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 1. Some basic concept of chemistry→1. Some basic concept of chemistry — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The formation of the oxide ion, $ O^{2-} (g),$ from oxygen atom requires first an exothermic and then an endothermic step as shown below: $\text{O(g)}+\text{e}^-\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ }\text{O}^-(\text{g}),\ \Delta\text{H}^\ominus=-141\ \text{kJ}\text{ mol}^{-1}$ $\text{O(g)}+\text{e}^-\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ }\text{O}^{-2}(\text{g}),\ \Delta\text{H}^\ominus=+780\ \text{kJ}\text{ mol}^{-1}$ Thus process of formation of $O^{2-}$ in gas phase is unfavourable even though $O^{2-}$ is isoelectronic with neon. It is due to the fact that:

Which of the following statements is/ are incorrect?

At a certain temp. the equilibrium constant $(K_C)$ is $16$ for reaction

$S{O_2} + N{O_2} \rightleftharpoons S{O_3} + NO$

If we take one mole of each of four gases in one $L$ container. What would be equilibrium concentration of $NO$ and $NO_2$ respectively

Which salt represent the highest degree of hydrolysis

Which of the following compound is optically active?

At $700\, K$, the equilibrium constant ${K_p}$ for the reaction $2S{O_{3(g)}}$ $\rightleftharpoons$ $ 2S{O_{2(g)}} + {O_{2(g)}}$ is $1.80 \times {10^{ - 3}}$ and $kP_a$ is $14$, ($R = 8.314\, Jk^{-1} \,mol^{-1}$). The numerical value in moles per litre of ${K_c}$ for this reaction at the same temperature will be

Ionization enthalpy of an atom is equal to

Valence bond theory of Pauling and Slater accounts for the following characteristic of covalent bond :

In the given pair identify most acidic compound in $(A)$ and $(B)$. Most basic in $(C)$ and $(D)$.

Which of the following compound is achiral ?