Pakistan Studies MCQs for Class 9 Chapter 2

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Pakistan Studies MCQs for Class 9

water
sodium chlorides

The density of ice at o°C is & nbsp
0.918g/cm3
0.618g/cm3
0.718g/cm3
0.8/8 g/cm3

The percentage of nitrogen in air is
76%
77%
78%
79%

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