IS MATTER AROUND US PURE?

INTRODUCTION + CLASSIFICATION OF MATTER(SOLID, LIQUID, GASES, MIXTURE, ATOM,MOLECULES, PURE SUBSTANCES, ELEMENTS AND COMPOUNDS)

Introduction|Is Air Present Every Where Around Us |Atmosphere|OMR

(A) Van Arkel method is used to prepare pure sample of titanium (R ) Mond's process is used to prepare pure sample nickel

Which is used again and again in the biosphere, matter or energy ?

Iron plough came into use around

Which cell of retina enable us to see coloured objects around us ?

Is air around us always transparent? Discuss