The number of carbon atoms per unit cell of diamond unit cell is:-
1. 4
2. 8
3. 6
4. 1
Heat of adduct formation
The numerical value of is found to be maximum for :
(1)
(2)
(3)
(4)
Borax is converted into crystalline boron by the following steps:
X and Y are respectively :
1. HCl, Mg
2. HCl, C
3. C, Al
4. HCl, Al
The dissolution of in a solution of results in the formation of -
1.
2.
3.
4.
Which of the following cation can not give borax bead test?
(a) (b)
(c) (d)
The incorrect statement regarding above reactions is :
(a) Al shows amphoteric character
(b) Gas 'P' and 'Q' are different
(d) Both X and Y are water soluble
(d) Gas Q is inflammable
The incorrect statement regarding above reactions is :
(1) Twelve electrons are involed in bonding
(2) Four, two centre-two electron bonds
(3) Two, three centre-two electron bonds
(4) X does not react with
The correct order of ease of hydrolysis is :
1. CCl4 < SiCl4 < PCl5 < AlCl3
2. AlCl3 < CCl4 < PCl5 < SiCl4
3. CCl4 < AlCl3 < PCl5 < SiCl4
4. CCl4 < AlCl3 < SiCl4 < PCl5
From the B2H6 all the following can be prepared except:
(1) H3BO3
(2) [BH2(NH3)2]+ [BH4]-
(3) B2(CH3)6
(4) NaBH4
In B2H6
(1) there is direct boron-boron bond
(2) the structure is similar to that of C2H6
(3) the boron atoms are linked through hydrogen bridges
(4) all the atoms are in one plane