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NCERT Book Class 9 Science Chapter 2 Is matter around us pure?

NCERT Book Class 9 Science Chapter 2 Is matter around us pure? More Detail

NCERT

The National Council of Educational Research and Training (NCERT) is an autonomous organisation set up in 1961 by the Government of India to assist and advise the Central and State Governments on policies and programmes for qualitative improvement in school education.