MCQ
Which is not electromagnetic radiation?
- AInfrared rays
- B$X-$ rays
- ✓Cathode rays
- D$\gamma$ rays
✓
Answer
Correct option: C.
Cathode rays
c
Electromagnetic waves contains only photons but Cathode-rays are beam of electrons therefore these are not considered as electromagnetic radiation.
Electromagnetic waves contains only photons but Cathode-rays are beam of electrons therefore these are not considered as electromagnetic radiation.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In known elements, the maximum number is of
The interatomic distances in ${H_2}$ and $C{l_2}$ molecules are $74$ and $198$ $pm$ respectively. The bond length of $HCl$ is ............. $\mathrm{pm}$
→Determine the empirical formula of Kelvar, used in making bullet proof vests, is $70.6\%\,C, 4.2\%\,H, 11.8\%\, N$ and $13.4\%\, O$
→The standard molar heat of formation of ethane, $C{O_2}$ and water $(l) $ are respectively $ -21.1, -94.1 $ and $-68.3\, kcal. $ The standard molar heat of combustion of ethane will be.....$kcal$
→Which of the following statements about ${H_3}B{O_3}$ is not correct
→Who developed the long form of the periodic table?
Le-Chatelier’s principle is applicable only to a
Given
→$(I)$ ${H_2}(g) + \frac{1}{2}{O_2}(g) \to {H_2}O(l);$
$\Delta {H^o_{298\,K}} = - 285.9\,kJ\,mo{l^{ - 1}}$
$(II)$ ${H_2}(g) + \frac{1}{2}{O_2}(g) \to {H_2}O(g);$
$\Delta {H^o_{298\,K}} = - 241.8\,kJ\,mo{l^{ - 1}}$
The molar enthalpy of vapourisation of water will be.....$kJ\,mol^{-1}$
The dipole moments of $\mathrm{CCl}_{4}, \mathrm{CHCl}_{3}$ and $\mathrm{CH}_{4}$ are in the order
→$IUPAC$ name of the compound (figure)
→