QBManager

PHXII13:NUCLEI

363888 Assertion :
When boron $_{5}^{10} B$ nucleus is bombarded by neutrons the nucleus formed is that of lithium.
Reason :
In the process an $α$ -particle is emitted.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

$_{5}^{10} B + n \to_{3}^{7} L i + α$
demonstrates the release of an alpha particle and the formation of lithium. This happens in $B F_{3}$ -filled counters. So correct option is (1).

PHXII13:NUCLEI

363889 An element $X$ decays into element $Z$ by two step process
$X \to Y +_{2}^{4} H e, Y \to Z + 2 e^{-}$

1

X

and

Z

are isobars

2

X

and

Y

are isotopes

3

X

and

Z

are isotones

4

X

and

Z

are isotopes

Explanation:

$X$ and $Z$ have same number of protons, so they are isotopes

KCET - 2016

PHXII13:NUCLEI

363890 Assertion :
$^{90} S r$ from the radioactive fall out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells.
Reason :
The energies of $β$ -particle emitted in the decay of $^{90} S r$ damage the bone marrow.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

Strontium- 90 , with an atomic number of 38 , undergoes decay to become Yttrium- 90 by emitting $β$ -rays. Strontium is absorbed into bones along with calcium. The harmful effects primarily result from the emission of $β$ -rays. So correct option is (1).

PHXII13:NUCLEI

363891 Consider the following radioactive decay process
supporting img
The mass number and the atomic number of
$A_{6}$ are given by

1 210 and 80

2 211 and 80

3 210 and 82

4 210 and 84

Explanation:

The decay process is as below, using the basic concepts of $α, β$ and $γ$ decay
supporting img
Thus mass number and the atomic number of $A_{6}$ will be 210 and 82 respectively.
So option (3) is correct.

JEE - 2023

PHXII13:NUCLEI

363892 $_{92} U^{238}$ absorbs a neutron. The product emits electron. This product further emits an electron. The product is

1

_{94} P u^{239}

2

_{90} P u^{239}

3

_{93} P u^{237}

4

_{94} P u^{237}

Explanation:

$_{92} U^{238} +_{0} n^{1} \to_{- 1} e^{0} +_{93} N p^{239} \to_{- 1} e^{0} +_{94} P u^{239}$

PHXII13:NUCLEI

363888 Assertion :
When boron $_{5}^{10} B$ nucleus is bombarded by neutrons the nucleus formed is that of lithium.
Reason :
In the process an $α$ -particle is emitted.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

$_{5}^{10} B + n \to_{3}^{7} L i + α$
demonstrates the release of an alpha particle and the formation of lithium. This happens in $B F_{3}$ -filled counters. So correct option is (1).

PHXII13:NUCLEI

363889 An element $X$ decays into element $Z$ by two step process
$X \to Y +_{2}^{4} H e, Y \to Z + 2 e^{-}$

1

X

and

Z

are isobars

2

X

and

Y

are isotopes

3

X

and

Z

are isotones

4

X

and

Z

are isotopes

Explanation:

$X$ and $Z$ have same number of protons, so they are isotopes

KCET - 2016

PHXII13:NUCLEI

363890 Assertion :
$^{90} S r$ from the radioactive fall out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells.
Reason :
The energies of $β$ -particle emitted in the decay of $^{90} S r$ damage the bone marrow.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

Strontium- 90 , with an atomic number of 38 , undergoes decay to become Yttrium- 90 by emitting $β$ -rays. Strontium is absorbed into bones along with calcium. The harmful effects primarily result from the emission of $β$ -rays. So correct option is (1).

PHXII13:NUCLEI

363891 Consider the following radioactive decay process
supporting img
The mass number and the atomic number of
$A_{6}$ are given by

1 210 and 80

2 211 and 80

3 210 and 82

4 210 and 84

Explanation:

The decay process is as below, using the basic concepts of $α, β$ and $γ$ decay
supporting img
Thus mass number and the atomic number of $A_{6}$ will be 210 and 82 respectively.
So option (3) is correct.

JEE - 2023

PHXII13:NUCLEI

363892 $_{92} U^{238}$ absorbs a neutron. The product emits electron. This product further emits an electron. The product is

1

_{94} P u^{239}

2

_{90} P u^{239}

3

_{93} P u^{237}

4

_{94} P u^{237}

Explanation:

$_{92} U^{238} +_{0} n^{1} \to_{- 1} e^{0} +_{93} N p^{239} \to_{- 1} e^{0} +_{94} P u^{239}$

PHXII13:NUCLEI

363888 Assertion :
When boron $_{5}^{10} B$ nucleus is bombarded by neutrons the nucleus formed is that of lithium.
Reason :
In the process an $α$ -particle is emitted.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

$_{5}^{10} B + n \to_{3}^{7} L i + α$
demonstrates the release of an alpha particle and the formation of lithium. This happens in $B F_{3}$ -filled counters. So correct option is (1).

PHXII13:NUCLEI

363889 An element $X$ decays into element $Z$ by two step process
$X \to Y +_{2}^{4} H e, Y \to Z + 2 e^{-}$

1

X

and

Z

are isobars

2

X

and

Y

are isotopes

3

X

and

Z

are isotones

4

X

and

Z

are isotopes

Explanation:

$X$ and $Z$ have same number of protons, so they are isotopes

KCET - 2016

PHXII13:NUCLEI

363890 Assertion :
$^{90} S r$ from the radioactive fall out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells.
Reason :
The energies of $β$ -particle emitted in the decay of $^{90} S r$ damage the bone marrow.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

Strontium- 90 , with an atomic number of 38 , undergoes decay to become Yttrium- 90 by emitting $β$ -rays. Strontium is absorbed into bones along with calcium. The harmful effects primarily result from the emission of $β$ -rays. So correct option is (1).

PHXII13:NUCLEI

363891 Consider the following radioactive decay process
supporting img
The mass number and the atomic number of
$A_{6}$ are given by

1 210 and 80

2 211 and 80

3 210 and 82

4 210 and 84

Explanation:

The decay process is as below, using the basic concepts of $α, β$ and $γ$ decay
supporting img
Thus mass number and the atomic number of $A_{6}$ will be 210 and 82 respectively.
So option (3) is correct.

JEE - 2023

PHXII13:NUCLEI

363892 $_{92} U^{238}$ absorbs a neutron. The product emits electron. This product further emits an electron. The product is

1

_{94} P u^{239}

2

_{90} P u^{239}

3

_{93} P u^{237}

4

_{94} P u^{237}

Explanation:

$_{92} U^{238} +_{0} n^{1} \to_{- 1} e^{0} +_{93} N p^{239} \to_{- 1} e^{0} +_{94} P u^{239}$

PHXII13:NUCLEI

363888 Assertion :
When boron $_{5}^{10} B$ nucleus is bombarded by neutrons the nucleus formed is that of lithium.
Reason :
In the process an $α$ -particle is emitted.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

$_{5}^{10} B + n \to_{3}^{7} L i + α$
demonstrates the release of an alpha particle and the formation of lithium. This happens in $B F_{3}$ -filled counters. So correct option is (1).

PHXII13:NUCLEI

363889 An element $X$ decays into element $Z$ by two step process
$X \to Y +_{2}^{4} H e, Y \to Z + 2 e^{-}$

1

X

and

Z

are isobars

2

X

and

Y

are isotopes

3

X

and

Z

are isotones

4

X

and

Z

are isotopes

Explanation:

$X$ and $Z$ have same number of protons, so they are isotopes

KCET - 2016

PHXII13:NUCLEI

363890 Assertion :
$^{90} S r$ from the radioactive fall out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells.
Reason :
The energies of $β$ -particle emitted in the decay of $^{90} S r$ damage the bone marrow.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

Strontium- 90 , with an atomic number of 38 , undergoes decay to become Yttrium- 90 by emitting $β$ -rays. Strontium is absorbed into bones along with calcium. The harmful effects primarily result from the emission of $β$ -rays. So correct option is (1).

PHXII13:NUCLEI

363891 Consider the following radioactive decay process
supporting img
The mass number and the atomic number of
$A_{6}$ are given by

1 210 and 80

2 211 and 80

3 210 and 82

4 210 and 84

Explanation:

The decay process is as below, using the basic concepts of $α, β$ and $γ$ decay
supporting img
Thus mass number and the atomic number of $A_{6}$ will be 210 and 82 respectively.
So option (3) is correct.

JEE - 2023

PHXII13:NUCLEI

363892 $_{92} U^{238}$ absorbs a neutron. The product emits electron. This product further emits an electron. The product is

1

_{94} P u^{239}

2

_{90} P u^{239}

3

_{93} P u^{237}

4

_{94} P u^{237}

Explanation:

$_{92} U^{238} +_{0} n^{1} \to_{- 1} e^{0} +_{93} N p^{239} \to_{- 1} e^{0} +_{94} P u^{239}$

PHXII13:NUCLEI

363888 Assertion :
When boron $_{5}^{10} B$ nucleus is bombarded by neutrons the nucleus formed is that of lithium.
Reason :
In the process an $α$ -particle is emitted.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

$_{5}^{10} B + n \to_{3}^{7} L i + α$
demonstrates the release of an alpha particle and the formation of lithium. This happens in $B F_{3}$ -filled counters. So correct option is (1).

PHXII13:NUCLEI

363889 An element $X$ decays into element $Z$ by two step process
$X \to Y +_{2}^{4} H e, Y \to Z + 2 e^{-}$

1

X

and

Z

are isobars

2

X

and

Y

are isotopes

3

X

and

Z

are isotones

4

X

and

Z

are isotopes

Explanation:

$X$ and $Z$ have same number of protons, so they are isotopes

KCET - 2016

PHXII13:NUCLEI

363890 Assertion :
$^{90} S r$ from the radioactive fall out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells.
Reason :
The energies of $β$ -particle emitted in the decay of $^{90} S r$ damage the bone marrow.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

Explanation:

Strontium- 90 , with an atomic number of 38 , undergoes decay to become Yttrium- 90 by emitting $β$ -rays. Strontium is absorbed into bones along with calcium. The harmful effects primarily result from the emission of $β$ -rays. So correct option is (1).

PHXII13:NUCLEI

363891 Consider the following radioactive decay process
supporting img
The mass number and the atomic number of
$A_{6}$ are given by

1 210 and 80

2 211 and 80

3 210 and 82

4 210 and 84

Explanation:

The decay process is as below, using the basic concepts of $α, β$ and $γ$ decay
supporting img
Thus mass number and the atomic number of $A_{6}$ will be 210 and 82 respectively.
So option (3) is correct.

JEE - 2023

PHXII13:NUCLEI

363892 $_{92} U^{238}$ absorbs a neutron. The product emits electron. This product further emits an electron. The product is

1

_{94} P u^{239}

2

_{90} P u^{239}

3

_{93} P u^{237}

4

_{94} P u^{237}

Explanation:

$_{92} U^{238} +_{0} n^{1} \to_{- 1} e^{0} +_{93} N p^{239} \to_{- 1} e^{0} +_{94} P u^{239}$