Removal of H2O from atmospheric air using anhydrous CaCl2 is an example of which change- physical or chemical?

(ii) pO2 higher, pCO2 lesser The partial pressure of oxygen in atmospheric air is higher than that of oxygen in alveolar air. In atmospheric air, pO2 is about 159 mm Hg....

(i) Al2(SO4)3→ Aluminium sulphate  (ii) CaCl2→ Calcium chloride  (iii) K2SO4→ Potassium sulphate  (iv) CaCO3→ Calcium carbonate

(c) corrosion and it is a chemical change

(a) Chemical change  (b) Acidic and basic solutions can be prepared by dissolving the products of the above process in water  CaO+H2O →Ca(OH)2 (basic solution)  CO2 + H2O→H2 CO3 (acidic solution)

Hint—Physical changes —(a), (b), (e)  Chemical changes— (c), (d)

CaCl2is known to increase the efficiency of DNA uptake to produce transformed bacterial cells. The divalent Ca+2 ions supposedly create transient pores on the bacterial cell wall by which the...

[Ti(H2O)6]3+ : In this core Ti+3 has one unpaired e- while Sc+3 does not has any unpaired electron.

(i) Hydrated copper sulphate – CuSO4.5H2O Anhydrous copper sulphate – CuSO4  Solutions  Activity : (a) Heat a few crystals of copper sulphate in a dry boiling tube. (b) Add 2 – 3 drops of water...