Description : (a) What are groups' and periods' in the periodic table'? (b) Two elements M and N belong to group I and II respectively and are in the same period of the periodic ... Sizes of their atoms Their metallic characters Their valencies in forming oxides Molecular formulae of their chlorides -Science
Last Answer : (a) The vertical columns in the periodic table are called groups'. The horizontal rows in the periodic table are called periods'. (b) M' and N' belong to same period but group I ... oxides. Valency goes on increasing first and then decreases. MCI, NCI2 are molecular formulae of their chlorides.
Description : Assertion :- Catalyst is more effective in powdered form. Reason :- Number of free valencies increase.
Last Answer : Assertion :- Catalyst is more effective in powdered form. Reason :- Number of free valencies increase. A ... D. If both Assertion & Reason are False.
Description : Efficiency of the catalyst depends on its (1) physical state (2) amount used (3) molecular state (4) number of free valencies
Last Answer : (3) molecular state