The energy of one mole of photons of radiation of wavelength 300 … - Vidyadip

MCQ

The energy of one mole of photons of radiation of wavelength $300 nm$ is ...... $kJ \,mol ^{-1}$.

(Given : $h =6.63 \times 10^{-34} \,Js , N _{ A }=6.02 \times 10^{23} \,mol ^{-1}$, $c =3 \times 10^{8}\, ms ^{-1}$ )

A
$235$
B
$325$
✓
$399$
D
$435$

✓

Answer

Correct option: C.

$399$

c
Energy of one mole of photons $=\frac{ hc }{\lambda} \times N _{ A }$

$\frac{6.63 \times 10^{-34} \times 3 \times 10^{8}}{300 \times 10^{-9}} \times 6.02 \times 10^{23}$

$=399.13 \times 10^{3} \,Joule / mole$

$=399\, kJ / mole$

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 2. structure of atom→2. structure of atom — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Which molecule/ ion out of the following does not contain unpaired electrons.

The element $119$ has not been discovered. What would be the symbol for this element?

Assertion : Rates of nitration of benzene and hexadeuterobenzene are different.

Reason : $C-H$ bond is stronger than $C-D$ bond.

$1, 2\,-\,$ Dibromopropane on treatement with $X$ moles of $NaNH_2$ followed by reaction with ethyl bromide give a $2 - $ pentyne the value of $X$ is

For the reaction $A _{( g )} \rightarrow( B )_{( g )},$ the value of the equilibrium constant at $300\, K$ and $1\, atm$ is equal to $100.0.$ The value of $\Delta_{ r } G$ for the reaction at $300 K$ and $1\, atm$ in $J\, mol ^{-1}$ is $- xR ,$ where $x$ is ........... (Rounded of to the nearest integer) $\left( R =8.31 \,J \,mol ^{-1} K ^{-1}\right.$ and $\left.\ln 10=2.3\right)$

If $1\ mL$ of $1\,M\ HCl$ solution is added to $99\ mL$ of aqueous solution of $NaCl$ so that $pH$ of $NaCl$ solution change by $X$ units. The value of $X$ is

In the reaction :$I_2 + 2S_2O_3^{2-} \to 2I^- + S_4O_6^{2-}$

An alkane has a $C/H-$ ratio (by mass) of $5.1428$. Its molecular formula is

Identify most acidic hydrogen present in the above compound

Which of the following carbocations is most stable