QBManager

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.

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 $_{10}^{20} Ne$ nucleus and $M_{2}$ that of a $_{20}^{40}$ Ca nucleus. Then

1

M_{2} = 2 M_{1}

2

M_{1} < 10 (m_{p} + m_{n})

3

M_{2} > 2 M_{1}

4

M_{1} = M_{2}

Explanation:

$_{10}^{20} Ne$ contains 10 protons and 10 neutrons
$∴ M_{1} = 10 mp + 10 Mn$
$_{20}^{40} Ca$ contains 20 protons and 20 neutrons
$\begin{aligned} ∴ M_{2} = 20 Mp + 20 Mn \\ ∴ M_{2} = 2 M_{1} \end{aligned}$

AIIMS-2015

Structure of Atom

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.

AIIMS 25 May 2019 (Morning)

Structure of Atom

238577 Assertion: Nuclear binding energy per nucleon in the order $_{4}^{9} Be >_{3}^{7} Li >_{2}^{4} He$
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 $_{3} {Li}^{7} (5.38$ $Mev)$ is less than $_{2} {He}^{4} (7.08 Mev)$ 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 $e = 1.60206 \times 10^{- 19} C, \frac{e}{m} = 1.75875 \times 10^{11} {Ckg}^{- 1}$ then the mass of electron is

1

7.5678 \times 10^{- 31} kg

2

9.1091 \times 10^{- 31} kg

3

11.2531 \times 10^{- 31} kg

4

13.0513 \times 10^{- 31} kg

Explanation:

$\begin{aligned} Mass of electron & = \frac{1.60206 \times 10^{- 19}}{1.75875 \times 10^{11}} \\ = 9.1091 \times 10^{- 31} \end{aligned}$
OR
$\begin{aligned} \frac{e}{m} = 1.75875 \times 10^{11} {Ckg}^{- 1} \\ e = 1.60206 \times 10^{- 19} C \\ m = \frac{e / e}{m} = \frac{1.60206 \times 10^{- 19}}{1.75875 \times 10^{11}} Kg \\ = 9.1091 \times 10^{- 31} Kg \end{aligned}$

AIIMS-1999

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.

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 $_{10}^{20} Ne$ nucleus and $M_{2}$ that of a $_{20}^{40}$ Ca nucleus. Then

1

M_{2} = 2 M_{1}

2

M_{1} < 10 (m_{p} + m_{n})

3

M_{2} > 2 M_{1}

4

M_{1} = M_{2}

Explanation:

$_{10}^{20} Ne$ contains 10 protons and 10 neutrons
$∴ M_{1} = 10 mp + 10 Mn$
$_{20}^{40} Ca$ contains 20 protons and 20 neutrons
$\begin{aligned} ∴ M_{2} = 20 Mp + 20 Mn \\ ∴ M_{2} = 2 M_{1} \end{aligned}$

AIIMS-2015

Structure of Atom

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.

AIIMS 25 May 2019 (Morning)

Structure of Atom

238577 Assertion: Nuclear binding energy per nucleon in the order $_{4}^{9} Be >_{3}^{7} Li >_{2}^{4} He$
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 $_{3} {Li}^{7} (5.38$ $Mev)$ is less than $_{2} {He}^{4} (7.08 Mev)$ 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 $e = 1.60206 \times 10^{- 19} C, \frac{e}{m} = 1.75875 \times 10^{11} {Ckg}^{- 1}$ then the mass of electron is

1

7.5678 \times 10^{- 31} kg

2

9.1091 \times 10^{- 31} kg

3

11.2531 \times 10^{- 31} kg

4

13.0513 \times 10^{- 31} kg

Explanation:

$\begin{aligned} Mass of electron & = \frac{1.60206 \times 10^{- 19}}{1.75875 \times 10^{11}} \\ = 9.1091 \times 10^{- 31} \end{aligned}$
OR
$\begin{aligned} \frac{e}{m} = 1.75875 \times 10^{11} {Ckg}^{- 1} \\ e = 1.60206 \times 10^{- 19} C \\ m = \frac{e / e}{m} = \frac{1.60206 \times 10^{- 19}}{1.75875 \times 10^{11}} Kg \\ = 9.1091 \times 10^{- 31} Kg \end{aligned}$

AIIMS-1999

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.

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 $_{10}^{20} Ne$ nucleus and $M_{2}$ that of a $_{20}^{40}$ Ca nucleus. Then

1

M_{2} = 2 M_{1}

2

M_{1} < 10 (m_{p} + m_{n})

3

M_{2} > 2 M_{1}

4

M_{1} = M_{2}

Explanation:

$_{10}^{20} Ne$ contains 10 protons and 10 neutrons
$∴ M_{1} = 10 mp + 10 Mn$
$_{20}^{40} Ca$ contains 20 protons and 20 neutrons
$\begin{aligned} ∴ M_{2} = 20 Mp + 20 Mn \\ ∴ M_{2} = 2 M_{1} \end{aligned}$

AIIMS-2015

Structure of Atom

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.

AIIMS 25 May 2019 (Morning)

Structure of Atom

238577 Assertion: Nuclear binding energy per nucleon in the order $_{4}^{9} Be >_{3}^{7} Li >_{2}^{4} He$
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 $_{3} {Li}^{7} (5.38$ $Mev)$ is less than $_{2} {He}^{4} (7.08 Mev)$ 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 $e = 1.60206 \times 10^{- 19} C, \frac{e}{m} = 1.75875 \times 10^{11} {Ckg}^{- 1}$ then the mass of electron is

1

7.5678 \times 10^{- 31} kg

2

9.1091 \times 10^{- 31} kg

3

11.2531 \times 10^{- 31} kg

4

13.0513 \times 10^{- 31} kg

Explanation:

$\begin{aligned} Mass of electron & = \frac{1.60206 \times 10^{- 19}}{1.75875 \times 10^{11}} \\ = 9.1091 \times 10^{- 31} \end{aligned}$
OR
$\begin{aligned} \frac{e}{m} = 1.75875 \times 10^{11} {Ckg}^{- 1} \\ e = 1.60206 \times 10^{- 19} C \\ m = \frac{e / e}{m} = \frac{1.60206 \times 10^{- 19}}{1.75875 \times 10^{11}} Kg \\ = 9.1091 \times 10^{- 31} Kg \end{aligned}$

AIIMS-1999

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.

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 $_{10}^{20} Ne$ nucleus and $M_{2}$ that of a $_{20}^{40}$ Ca nucleus. Then

1

M_{2} = 2 M_{1}

2

M_{1} < 10 (m_{p} + m_{n})

3

M_{2} > 2 M_{1}

4

M_{1} = M_{2}

Explanation:

$_{10}^{20} Ne$ contains 10 protons and 10 neutrons
$∴ M_{1} = 10 mp + 10 Mn$
$_{20}^{40} Ca$ contains 20 protons and 20 neutrons
$\begin{aligned} ∴ M_{2} = 20 Mp + 20 Mn \\ ∴ M_{2} = 2 M_{1} \end{aligned}$

AIIMS-2015

Structure of Atom

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.

AIIMS 25 May 2019 (Morning)

Structure of Atom

238577 Assertion: Nuclear binding energy per nucleon in the order $_{4}^{9} Be >_{3}^{7} Li >_{2}^{4} He$
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 $_{3} {Li}^{7} (5.38$ $Mev)$ is less than $_{2} {He}^{4} (7.08 Mev)$ 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 $e = 1.60206 \times 10^{- 19} C, \frac{e}{m} = 1.75875 \times 10^{11} {Ckg}^{- 1}$ then the mass of electron is

1

7.5678 \times 10^{- 31} kg

2

9.1091 \times 10^{- 31} kg

3

11.2531 \times 10^{- 31} kg

4

13.0513 \times 10^{- 31} kg

Explanation:

$\begin{aligned} Mass of electron & = \frac{1.60206 \times 10^{- 19}}{1.75875 \times 10^{11}} \\ = 9.1091 \times 10^{- 31} \end{aligned}$
OR
$\begin{aligned} \frac{e}{m} = 1.75875 \times 10^{11} {Ckg}^{- 1} \\ e = 1.60206 \times 10^{- 19} C \\ m = \frac{e / e}{m} = \frac{1.60206 \times 10^{- 19}}{1.75875 \times 10^{11}} Kg \\ = 9.1091 \times 10^{- 31} Kg \end{aligned}$

AIIMS-1999

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.

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 $_{10}^{20} Ne$ nucleus and $M_{2}$ that of a $_{20}^{40}$ Ca nucleus. Then

1

M_{2} = 2 M_{1}

2

M_{1} < 10 (m_{p} + m_{n})

3

M_{2} > 2 M_{1}

4

M_{1} = M_{2}

Explanation:

$_{10}^{20} Ne$ contains 10 protons and 10 neutrons
$∴ M_{1} = 10 mp + 10 Mn$
$_{20}^{40} Ca$ contains 20 protons and 20 neutrons
$\begin{aligned} ∴ M_{2} = 20 Mp + 20 Mn \\ ∴ M_{2} = 2 M_{1} \end{aligned}$

AIIMS-2015

Structure of Atom

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.

AIIMS 25 May 2019 (Morning)

Structure of Atom

238577 Assertion: Nuclear binding energy per nucleon in the order $_{4}^{9} Be >_{3}^{7} Li >_{2}^{4} He$
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 $_{3} {Li}^{7} (5.38$ $Mev)$ is less than $_{2} {He}^{4} (7.08 Mev)$ 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 $e = 1.60206 \times 10^{- 19} C, \frac{e}{m} = 1.75875 \times 10^{11} {Ckg}^{- 1}$ then the mass of electron is

1

7.5678 \times 10^{- 31} kg

2

9.1091 \times 10^{- 31} kg

3

11.2531 \times 10^{- 31} kg

4

13.0513 \times 10^{- 31} kg

Explanation:

$\begin{aligned} Mass of electron & = \frac{1.60206 \times 10^{- 19}}{1.75875 \times 10^{11}} \\ = 9.1091 \times 10^{- 31} \end{aligned}$
OR
$\begin{aligned} \frac{e}{m} = 1.75875 \times 10^{11} {Ckg}^{- 1} \\ e = 1.60206 \times 10^{- 19} C \\ m = \frac{e / e}{m} = \frac{1.60206 \times 10^{- 19}}{1.75875 \times 10^{11}} Kg \\ = 9.1091 \times 10^{- 31} Kg \end{aligned}$

AIIMS-1999