Question Text
Question 1 :
Numbering of groups as 1, 2, ........... 18 was adopted by IUPAC in :
Question 6 :
In Doberenier triads, the atomic weights of the elements in a triad are in increasing order.<br/>
Question 7 :
If the two members of a Dobereiner's triad are chlorine and iodine, then the third member of this triad is :<br/>
Question 10 :
The placement of elements in the Newlands' table was compared to :
Question 11 :
Mendeleev arranged the elements in increasing order of their atomic masses and according to their physical properties.<br/>
Question 13 :
Statement: In Dobernier classification of elements, the atomic weight of the middle element is equal to the average of the extreme elements of a triad.<br/><br/>State whether the given statement is true or false.
Question 14 :
The number of elements known in Mendeleev's presented periodic table is:<br/>
Question 15 :
The alkali metals are in which group of the periodic table?<br>
Question 16 :
The standard emf of a galvanic cell involving cell reaction with <i>n</i> = 2 is found to be 0.295 V at 25C°. The equilibrium constant of the reaction would be<br/>(Given, $F = 96500 C mol^{-1}, R = 8. 314 JK^{-1} mol^{-1}$ )