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BITSexam
1. One of the following combinations illustrates the law of reciprocal proportions
CS
2
, CO
2
, SO
2
PH
3
, P
2
O
3
, P
2
O
5
N
2
O
3
,N
2
O
4
,N
2
O
5
NaCl,NaBr,NaI