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NCERT Book Class 7 Science Chapter 4 Acids, Bases and Salts

NCERT Book Class 7 Science Chapter 4 Acids, Bases and Salts 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.