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Statement-1 : Electron capture occurs mo...

Statement-1 : Electron capture occurs more often than positron emission in heavy elements.
and
Statement-2 : Heavy element generally exhibit radioactivity.

A

Assertion and Reason are true and Reason is the correct explanation of Assertion

B

Assertion and Reason are true and Reason is not the correct explanation of Assertion

C

Assertion is true , Reason is false

D

Assertion is false , Reason is true .

Text Solution

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The correct Answer is:
B
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Electron capture occurs more often than positron emission in heavy elements. Heavy elements exhibit radioactivity.

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Statement-1 : In alpha -emission, the alpha -particle carries in heavy elements. and Statement-2 : In alpha -decay, the alpha -particle being lighter has more velocity.

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Statement-1: Bridge head carbocation is less stable than Bridge head carbanion. and Statement-2: C atom in carbocation is sp^(2) generally hybridized.

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Statement-1 : In LiCl more covalent character is present in LiF. and Statement-2 : Polarizability of Br^(-) is more than Cl^(-)

Statement-1 : First electron gain enthalpy is alway -ve for an element. Statement-2 : Magnitude of electron gain enthalpy irregularly increases from left to right in a period.

Statement -1: Tertiary amines have lower boiling point than secondary amine. and Statement-2: Hydrogen bonding is often responsible for increases in boiling point.

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AAKASH SERIES-NUCLEI-Exercise-I
  1. .(+1)e^@ + .(-1)e^@ to 2gamma The above equation satisfies the law of ...

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  2. If a radioactive nucleus decay according to the following reaction ....

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  3. Which of the following particles is most unstable?

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  4. The products of combustion of an aliphatic thiol (RSH) at 298K are

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  5. As the age of star increases

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  6. A particle having no charge and almost no rest mass

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  7. In the nuclear process .6C^(11) rarr .2B^(11) +beta^(+) +X,X stands fo...

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  8. Two identical nuclei A and B of the same radioactive element undergo b...

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  9. During beta-decay (beta minus), the emission of antineutrino particle ...

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  10. A nuclide A undergoes alpha - decay and another nuclide B undergoes be...

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  11. In the fission of U^235 (i) Slow neutron is absorbed by U^235 (ii)...

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  12. Which of the following statements are correct (i) Positron is predic...

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  13. Consider the following two statements A and B and identify the correct...

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  14. Consider the following statements. A, B and identify the correct choic...

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  15. Consider the following statements (A) and (B) and identify the correct...

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  16. Assertion: Free Neutron decays into proton, electron and antineutrino ...

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  17. Assertion : Nuclear forces arise from strong coulombic interactions be...

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  18. This question contains Statement - 1 and Statement -2 Of the four choi...

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  19. Statement-1 : Electron capture occurs more often than positron emissio...

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  20. Match the following Match list I (Type of ore) with list II.

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