Which of the following gas is/are called rare gas [CPMT 2000; Pb. CET

1.	Which of the following gas is/are called rare gas [CPMT 2000; Pb. CET 2002]
A.	Ne
B.	He
C.	Kr
D.	All of these
Answer» E.

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Which of the following gas is/are called rare gas [CPMT 2000; Pb. CET 2002]

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