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कथन-यदि 100 मि ली `0.2N HCl` तथा `100ml 0.3NHCl` को मिश्रित करे तो प्राप्त विलयन की नॉर्मलता `0.25N` होगी .
कारण समान विलयनों जैसे - HCl को मिश्रित करने पर प्राप्त विलयन की मोललता `(N_(1)V_(1)+N_(2)V_(2))/((V_(1)+V_(2)))` होगी .
A. कथन तथा कारण दोनों सही है तथा कारण कथन का सही स्पष्टीकरण देता है .
B. कथन तथा कारण दोनों सही है लेकिन कारण कथन का सही स्पष्टीकरण नहीं देता .
C. कथन सही है लेकिन कारण गलत है.
D. कथन व कारण दोनों गलत है

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यदि `100 ml 0.2N HCl ` व `1 00 ml 0.3N HCl` को मिश्रत करते है, तो
`(N_(1)V_(1)+N_(2)V_(2))/((V_(1)+V_(2)))=N_(3)=(0.2Nxx100+0.3N100)/(200)`
`N_(3)=(0.5Nxx100)/(200)=0.25N.`

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