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Assertion : To separate U-235 from the m...

Assertion : To separate U-235 from the more abundant U-238 isotope, all the uranium is converted into `UF_(6)`
Reason : `UF_(6)` is one of the new compounds that exists in gaseous state under ordinary conditions

A

Both A and R are true and R is the correct explanation of A

B

Both A and R are true but R is not a correct explanation of A

C

A is true but R is false

D

A is false but R is true

Text Solution

Verified by Experts

The correct Answer is:
A
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Calculate the relative rates of diffusion of 235 UF_(6) and 238 U F_(6) in the gaseous form.

Uranium isotopes have been separated by taking advantage of the different rates of diffusion of the two formsof uranium hexafluoride, one containing U-238 isotope and the other containing U-235. What are the relative rates of diffusion of these two molecules under ideal conditions ?

Knowledge Check

  • STATEMENT-1 : Environment of U^(235) from a mixture containing more abundant U^(238) is based on diffusion of UF_(6) and STATEMENT -2 : UF_(6) is gaseous compound under ordinary conditions.

    A
    STATEMENT-1 is True, STATEMENT-2 is True, STATEMENT-2 is correct explanation for STATEMENT-1
    B
    STATEMENT-1 is True, STATEMENT-2 is True, STATEMENT-2 is NOT a correct explanation for STATEMENT-1
    C
    STATEMENT-1 is True, STATEMENT-2 is False
    D
    STATEMENT-1 is False, STATEMENT-2 is True

  • 1 g of U-235 is converted into UF_(6) . The radioactivity of UF_(6) thus obtained is

    A
    zero
    B
    less than that of 1 g of U-235
    C
    more than that of 1 g of U-235
    D
    same as that of 1 g of U-235

  • (A) Enrichement of U^(235) from a mixture containing more abundant U^(238) is based on diffusion of UF_(6) . UF_(6) is a gaseous compound under ordinary conditions.

    A
    If both (A) and (R ) are correct and (R ) is the correct explanation for (A).
    B
    If both (A) and (R ) are correct but (R ) is not the correct explanation for (A )
    C
    If both (A) and (R ) are incorrect.
    D
    If both (A) and (R ) are incorrect.

    • Similar Questions

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    Substitution of one or more hydrogen atom(s) from a hydrocarbon by another atom or a group of atoms result in the formation of an entirely new compound having altogether different properties and applications. Alcohols and phenols are formed when a hydrogen atom in a hydrocarbon, aliphatic and aromatic respectively, is replaced by -OH group. These classes of compounds find wide applications in industry as well as in day-to-day life. For instance, have you ever noticed that ordinary spirit used for polishing wooden furniture is chiefly a compound containing hydroxyl group, ethanol. The sugar we eat, the cotton used for fabrics, the paper we use for writing, are all made up of compounds containing -OH groups. Just think of life without paper, no note-books, books, newspapers, currency notes, cheques, certificates, etc. The magazines carrying beautiful photographs and interesting stories would disappear from our life. It would have been really a different world. An alcohol contains one or more hydroxyl (OH) group(s) directly attached to carbon atom(s), of an aliphatic system (CH_(3)OH) while a phenol contains -OH group(s) directly attached to carbon atom(s) of an aromatic system (C_(6)H_(5)OH) . Give some examples of compounds of daily use which contain hydroxyl group.

    The compound used for preparation of UF_(6) in the enrichment of ._(92)U^(235) is

    Assertion U-235 is unstable isotope of uranium. Unergo alpha- decay. Reason alpha- decay is observed with all radioactive isotopes having atomic number greater than 82.

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    Assertion. All organisms contain the same organic compounds in about the same proportions. Reason. All organisms have evolved from the first primitive cells which came into existence about 3.6 billion years ago.

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