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Pipes & Cistern Quiz For Upcoming Exams

Q1. A tank can be filled by two pipes in 20 minutes and 30 minutes respectively. When the tank was empty the two pipes were opened. After...
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Chemistry Notes For SSC CGL / CHSL Exam 2019-20 on :...

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Placing similar groups and species together is known as Classification. Classification is needed to easily understand the properties of different elements in a periodic table....

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