Question
Reason (R): Alkali metals have low work functions.
a.
Both A and R are true and R is 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
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Q. Assertion (A): Alkali metals are used as emitters in phototubes. Reason (R): Alkali metals have low work functions.
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