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Subject :NSO    Class : Class 9

Melting and boiling points of some substances are listed in the given table :

Fill in the blanks by choosing an appropriate option. The substances which are liquid at – 185°C are __p__ and __q__ and the substance which is a liquid over the largest range of temperature is __r__ .

--------p--------q----------r
AII--------III--------IV
BI---------II--------III
CI---------IV--------IV
DI---------IV--------I


ans should be c

Ans 1:

Class : Class 9
sorry it should be dthey have given c

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