160640
The no.of unpaired electrons in \(\mathrm{Cr}^{+3}\) ion will be (At. no. of \(\mathrm{Cr}=24\) ) :
1 2
2 3
3 4
4 5
Explanation:
Concept Based
NCERT 58
1 RBTS PAPER
160641
An object absorbs a photon of wavelength \(2400 \AA\) and emits two photons. If wavelength of first photon is \(6000 \AA\), the wavelength of second photon will be :
1 \(3600 \AA\)
2 \(4000 \AA\)
3 \(5500 \AA\)
4 \(8400 \AA\)
Explanation:
Using law of conservation of energy \(\begin{aligned} & \mathrm{E}=\mathrm{E}_1+\mathrm{E}_2 \\ & \frac{\mathrm{hc}}{\lambda}=\frac{\mathrm{hc}}{\lambda_1}+\frac{\mathrm{hc}}{\lambda_2} \end{aligned}\)
NCERT 45
1 RBTS PAPER
160642
Which of the following is incorrect about de Broglie relationship :
\(\text { using } \mathrm{E}_{\text {kintic }}=\frac{1}{2} \mathrm{mv}^2 \text { and } \lambda=\frac{\mathrm{h}}{\mathrm{mv}}\)
NCERT 46
1 RBTS PAPER
160643
The anion \(X^{-3}\) has 16 neutrons in its nucleus, If this anion contains 18 electrons, then what will be the number of nucleons in its molecule \(\mathrm{X}_4\) ?
160640
The no.of unpaired electrons in \(\mathrm{Cr}^{+3}\) ion will be (At. no. of \(\mathrm{Cr}=24\) ) :
1 2
2 3
3 4
4 5
Explanation:
Concept Based
NCERT 58
1 RBTS PAPER
160641
An object absorbs a photon of wavelength \(2400 \AA\) and emits two photons. If wavelength of first photon is \(6000 \AA\), the wavelength of second photon will be :
1 \(3600 \AA\)
2 \(4000 \AA\)
3 \(5500 \AA\)
4 \(8400 \AA\)
Explanation:
Using law of conservation of energy \(\begin{aligned} & \mathrm{E}=\mathrm{E}_1+\mathrm{E}_2 \\ & \frac{\mathrm{hc}}{\lambda}=\frac{\mathrm{hc}}{\lambda_1}+\frac{\mathrm{hc}}{\lambda_2} \end{aligned}\)
NCERT 45
1 RBTS PAPER
160642
Which of the following is incorrect about de Broglie relationship :
\(\text { using } \mathrm{E}_{\text {kintic }}=\frac{1}{2} \mathrm{mv}^2 \text { and } \lambda=\frac{\mathrm{h}}{\mathrm{mv}}\)
NCERT 46
1 RBTS PAPER
160643
The anion \(X^{-3}\) has 16 neutrons in its nucleus, If this anion contains 18 electrons, then what will be the number of nucleons in its molecule \(\mathrm{X}_4\) ?
160640
The no.of unpaired electrons in \(\mathrm{Cr}^{+3}\) ion will be (At. no. of \(\mathrm{Cr}=24\) ) :
1 2
2 3
3 4
4 5
Explanation:
Concept Based
NCERT 58
1 RBTS PAPER
160641
An object absorbs a photon of wavelength \(2400 \AA\) and emits two photons. If wavelength of first photon is \(6000 \AA\), the wavelength of second photon will be :
1 \(3600 \AA\)
2 \(4000 \AA\)
3 \(5500 \AA\)
4 \(8400 \AA\)
Explanation:
Using law of conservation of energy \(\begin{aligned} & \mathrm{E}=\mathrm{E}_1+\mathrm{E}_2 \\ & \frac{\mathrm{hc}}{\lambda}=\frac{\mathrm{hc}}{\lambda_1}+\frac{\mathrm{hc}}{\lambda_2} \end{aligned}\)
NCERT 45
1 RBTS PAPER
160642
Which of the following is incorrect about de Broglie relationship :
\(\text { using } \mathrm{E}_{\text {kintic }}=\frac{1}{2} \mathrm{mv}^2 \text { and } \lambda=\frac{\mathrm{h}}{\mathrm{mv}}\)
NCERT 46
1 RBTS PAPER
160643
The anion \(X^{-3}\) has 16 neutrons in its nucleus, If this anion contains 18 electrons, then what will be the number of nucleons in its molecule \(\mathrm{X}_4\) ?
160640
The no.of unpaired electrons in \(\mathrm{Cr}^{+3}\) ion will be (At. no. of \(\mathrm{Cr}=24\) ) :
1 2
2 3
3 4
4 5
Explanation:
Concept Based
NCERT 58
1 RBTS PAPER
160641
An object absorbs a photon of wavelength \(2400 \AA\) and emits two photons. If wavelength of first photon is \(6000 \AA\), the wavelength of second photon will be :
1 \(3600 \AA\)
2 \(4000 \AA\)
3 \(5500 \AA\)
4 \(8400 \AA\)
Explanation:
Using law of conservation of energy \(\begin{aligned} & \mathrm{E}=\mathrm{E}_1+\mathrm{E}_2 \\ & \frac{\mathrm{hc}}{\lambda}=\frac{\mathrm{hc}}{\lambda_1}+\frac{\mathrm{hc}}{\lambda_2} \end{aligned}\)
NCERT 45
1 RBTS PAPER
160642
Which of the following is incorrect about de Broglie relationship :
\(\text { using } \mathrm{E}_{\text {kintic }}=\frac{1}{2} \mathrm{mv}^2 \text { and } \lambda=\frac{\mathrm{h}}{\mathrm{mv}}\)
NCERT 46
1 RBTS PAPER
160643
The anion \(X^{-3}\) has 16 neutrons in its nucleus, If this anion contains 18 electrons, then what will be the number of nucleons in its molecule \(\mathrm{X}_4\) ?
