General Science- Para Me Dhwani Ki Chaal Lagbhag Hai ?

Q.10479: पारा में ध्वनि की चाल लगभग है ?
A
B
C
D
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पारा में ध्वनि की चाल लगभग है ? - What is the trick of sound in mercury almost? - Para Me Dhwani Ki Chaal Lagbhag Hai ? General Science in hindi,   332 Mee . / Se . question answers in hindi pdf  330 Mee . / Se . questions in hindi, Know About 1450 Mee . / Se . General Science online test General Science notes in hindi quiz book    Uprokt Sabhi