238578
Assertion: Atoms are not electrically neutral. Reason: Number of protons and electrons are different
1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason, are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Explanation:
Atoms are electrically neutral because they have an equal number of protons and electrons, and as we know that the protons and electrons contain opposite types of charges, hence their negatively charged electrons are completely balanced with their positively charged protons. Hence, given both the assertion and reason are false.
AIIMS-1999
Structure of Atom
238579
Let $m_p$ be the mass of a proton, $m_n$ that of a neutron, $M_1$ that of a ${ }_{10}^{20} \mathrm{Ne}$ nucleus and $M_2$ that of a ${ }_{20}^{40}$ Ca nucleus. Then
238573
Assertion: The chemical properties of different isotopes are same. Reason: Isotopes have same number of neutron.
1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
The chemical proporties of different isotopes are same. But isotopes does'nt have same number of neutron.
AIIMS 25 May 2019 (Morning)
Structure of Atom
238577
Assertion: Nuclear binding energy per nucleon in the order ${ }_4^9 \mathrm{Be}>{ }_3^7 \mathrm{Li}>{ }_2^4 \mathrm{He}$ Reason: Binding energy per nucleon increases linearly with difference in number of neutrons and protons.
1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason, are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Explanation:
Binding energy per nucleon of ${ }_3 \mathrm{Li}^7(5.38$ $\mathrm{Mev})$ is less than ${ }_2 \mathrm{He}^4(7.08 \mathrm{Mev})$ as helium is found to be more stable than Li. As the atomic mass number increases the binding energy per nucleon decreases. As the atomic number and the atomic mass number increase the repulsive electrostatic force within the nucleus increase due to the greater number of protons in the heavy elements. To overcome this increased repulsion, the proportion of neutrons in the nucleus must increase to maintain stability. This increase in the neutron to proton ratio only partially compensates for the growing proton-proton repulsive force in the heavier naturally occurring element.
AIIMS-2004
Structure of Atom
238581
If $\mathrm{e}=1.60206 \times 10^{-19} \mathrm{C}, \frac{\mathrm{e}}{\mathrm{m}}=1.75875 \times 10^{11} \mathrm{Ckg}^{-1}$ then the mass of electron is
238578
Assertion: Atoms are not electrically neutral. Reason: Number of protons and electrons are different
1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason, are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Explanation:
Atoms are electrically neutral because they have an equal number of protons and electrons, and as we know that the protons and electrons contain opposite types of charges, hence their negatively charged electrons are completely balanced with their positively charged protons. Hence, given both the assertion and reason are false.
AIIMS-1999
Structure of Atom
238579
Let $m_p$ be the mass of a proton, $m_n$ that of a neutron, $M_1$ that of a ${ }_{10}^{20} \mathrm{Ne}$ nucleus and $M_2$ that of a ${ }_{20}^{40}$ Ca nucleus. Then
238573
Assertion: The chemical properties of different isotopes are same. Reason: Isotopes have same number of neutron.
1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
The chemical proporties of different isotopes are same. But isotopes does'nt have same number of neutron.
AIIMS 25 May 2019 (Morning)
Structure of Atom
238577
Assertion: Nuclear binding energy per nucleon in the order ${ }_4^9 \mathrm{Be}>{ }_3^7 \mathrm{Li}>{ }_2^4 \mathrm{He}$ Reason: Binding energy per nucleon increases linearly with difference in number of neutrons and protons.
1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason, are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Explanation:
Binding energy per nucleon of ${ }_3 \mathrm{Li}^7(5.38$ $\mathrm{Mev})$ is less than ${ }_2 \mathrm{He}^4(7.08 \mathrm{Mev})$ as helium is found to be more stable than Li. As the atomic mass number increases the binding energy per nucleon decreases. As the atomic number and the atomic mass number increase the repulsive electrostatic force within the nucleus increase due to the greater number of protons in the heavy elements. To overcome this increased repulsion, the proportion of neutrons in the nucleus must increase to maintain stability. This increase in the neutron to proton ratio only partially compensates for the growing proton-proton repulsive force in the heavier naturally occurring element.
AIIMS-2004
Structure of Atom
238581
If $\mathrm{e}=1.60206 \times 10^{-19} \mathrm{C}, \frac{\mathrm{e}}{\mathrm{m}}=1.75875 \times 10^{11} \mathrm{Ckg}^{-1}$ then the mass of electron is
NEET Test Series from KOTA - 10 Papers In MS WORD
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Structure of Atom
238578
Assertion: Atoms are not electrically neutral. Reason: Number of protons and electrons are different
1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason, are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Explanation:
Atoms are electrically neutral because they have an equal number of protons and electrons, and as we know that the protons and electrons contain opposite types of charges, hence their negatively charged electrons are completely balanced with their positively charged protons. Hence, given both the assertion and reason are false.
AIIMS-1999
Structure of Atom
238579
Let $m_p$ be the mass of a proton, $m_n$ that of a neutron, $M_1$ that of a ${ }_{10}^{20} \mathrm{Ne}$ nucleus and $M_2$ that of a ${ }_{20}^{40}$ Ca nucleus. Then
238573
Assertion: The chemical properties of different isotopes are same. Reason: Isotopes have same number of neutron.
1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
The chemical proporties of different isotopes are same. But isotopes does'nt have same number of neutron.
AIIMS 25 May 2019 (Morning)
Structure of Atom
238577
Assertion: Nuclear binding energy per nucleon in the order ${ }_4^9 \mathrm{Be}>{ }_3^7 \mathrm{Li}>{ }_2^4 \mathrm{He}$ Reason: Binding energy per nucleon increases linearly with difference in number of neutrons and protons.
1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason, are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Explanation:
Binding energy per nucleon of ${ }_3 \mathrm{Li}^7(5.38$ $\mathrm{Mev})$ is less than ${ }_2 \mathrm{He}^4(7.08 \mathrm{Mev})$ as helium is found to be more stable than Li. As the atomic mass number increases the binding energy per nucleon decreases. As the atomic number and the atomic mass number increase the repulsive electrostatic force within the nucleus increase due to the greater number of protons in the heavy elements. To overcome this increased repulsion, the proportion of neutrons in the nucleus must increase to maintain stability. This increase in the neutron to proton ratio only partially compensates for the growing proton-proton repulsive force in the heavier naturally occurring element.
AIIMS-2004
Structure of Atom
238581
If $\mathrm{e}=1.60206 \times 10^{-19} \mathrm{C}, \frac{\mathrm{e}}{\mathrm{m}}=1.75875 \times 10^{11} \mathrm{Ckg}^{-1}$ then the mass of electron is
238578
Assertion: Atoms are not electrically neutral. Reason: Number of protons and electrons are different
1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason, are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Explanation:
Atoms are electrically neutral because they have an equal number of protons and electrons, and as we know that the protons and electrons contain opposite types of charges, hence their negatively charged electrons are completely balanced with their positively charged protons. Hence, given both the assertion and reason are false.
AIIMS-1999
Structure of Atom
238579
Let $m_p$ be the mass of a proton, $m_n$ that of a neutron, $M_1$ that of a ${ }_{10}^{20} \mathrm{Ne}$ nucleus and $M_2$ that of a ${ }_{20}^{40}$ Ca nucleus. Then
238573
Assertion: The chemical properties of different isotopes are same. Reason: Isotopes have same number of neutron.
1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
The chemical proporties of different isotopes are same. But isotopes does'nt have same number of neutron.
AIIMS 25 May 2019 (Morning)
Structure of Atom
238577
Assertion: Nuclear binding energy per nucleon in the order ${ }_4^9 \mathrm{Be}>{ }_3^7 \mathrm{Li}>{ }_2^4 \mathrm{He}$ Reason: Binding energy per nucleon increases linearly with difference in number of neutrons and protons.
1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason, are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Explanation:
Binding energy per nucleon of ${ }_3 \mathrm{Li}^7(5.38$ $\mathrm{Mev})$ is less than ${ }_2 \mathrm{He}^4(7.08 \mathrm{Mev})$ as helium is found to be more stable than Li. As the atomic mass number increases the binding energy per nucleon decreases. As the atomic number and the atomic mass number increase the repulsive electrostatic force within the nucleus increase due to the greater number of protons in the heavy elements. To overcome this increased repulsion, the proportion of neutrons in the nucleus must increase to maintain stability. This increase in the neutron to proton ratio only partially compensates for the growing proton-proton repulsive force in the heavier naturally occurring element.
AIIMS-2004
Structure of Atom
238581
If $\mathrm{e}=1.60206 \times 10^{-19} \mathrm{C}, \frac{\mathrm{e}}{\mathrm{m}}=1.75875 \times 10^{11} \mathrm{Ckg}^{-1}$ then the mass of electron is
238578
Assertion: Atoms are not electrically neutral. Reason: Number of protons and electrons are different
1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason, are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Explanation:
Atoms are electrically neutral because they have an equal number of protons and electrons, and as we know that the protons and electrons contain opposite types of charges, hence their negatively charged electrons are completely balanced with their positively charged protons. Hence, given both the assertion and reason are false.
AIIMS-1999
Structure of Atom
238579
Let $m_p$ be the mass of a proton, $m_n$ that of a neutron, $M_1$ that of a ${ }_{10}^{20} \mathrm{Ne}$ nucleus and $M_2$ that of a ${ }_{20}^{40}$ Ca nucleus. Then
238573
Assertion: The chemical properties of different isotopes are same. Reason: Isotopes have same number of neutron.
1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
Explanation:
The chemical proporties of different isotopes are same. But isotopes does'nt have same number of neutron.
AIIMS 25 May 2019 (Morning)
Structure of Atom
238577
Assertion: Nuclear binding energy per nucleon in the order ${ }_4^9 \mathrm{Be}>{ }_3^7 \mathrm{Li}>{ }_2^4 \mathrm{He}$ Reason: Binding energy per nucleon increases linearly with difference in number of neutrons and protons.
1 If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
2 If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
3 If the Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason, are incorrect.
5 If the Assertion is incorrect but the Reason is correct.
Explanation:
Binding energy per nucleon of ${ }_3 \mathrm{Li}^7(5.38$ $\mathrm{Mev})$ is less than ${ }_2 \mathrm{He}^4(7.08 \mathrm{Mev})$ as helium is found to be more stable than Li. As the atomic mass number increases the binding energy per nucleon decreases. As the atomic number and the atomic mass number increase the repulsive electrostatic force within the nucleus increase due to the greater number of protons in the heavy elements. To overcome this increased repulsion, the proportion of neutrons in the nucleus must increase to maintain stability. This increase in the neutron to proton ratio only partially compensates for the growing proton-proton repulsive force in the heavier naturally occurring element.
AIIMS-2004
Structure of Atom
238581
If $\mathrm{e}=1.60206 \times 10^{-19} \mathrm{C}, \frac{\mathrm{e}}{\mathrm{m}}=1.75875 \times 10^{11} \mathrm{Ckg}^{-1}$ then the mass of electron is