Chemistry In Everyday Life Ques 13
13. Antiseptics and disinfectants either kill or prevent growth of microorganisms. Identify which of the following statements is not true:
[NEET 2013]
(a) Chlorine and iodine are used as strong disinfectants.
(b) Dilute solutions of Boric acid and Hydrogen Peroxide are weak antiseptics.
(c) Disinfectants kill or inactivate microorganisms on non-living surfaces.
(d) A $0.2 \%$ solution of phenol is an antiseptic while $1 \%$ solution acts as a disinfectant.
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Answer:
Correct Answer: 13.(a)
Solution:
(a) Mass number is affected by emission of $\alpha$ particle while $\beta$- particles have negligible mass and do not affect mass number. e.g.
$ _Z X^A \xrightarrow{-\beta} _{Z+1} X^{A} \xrightarrow{\beta} _{Z} X^{A} \xrightarrow{\beta} _{Z-1} X^{A} $
BETA
