Which of the following organo - silicon compound on hydrolysis will give a three dimensional silicone ?
R3SiCl
RSiCl3
SiCl4
R2SiCl2
Half-life of radioactive substance is 4 days . Amount of the substance decayed in two days is :
1 -
20 %
Reagent used to extract silver from Ag2S is :
NaCN
NaCN in presence of O2
NaCl
AgNO3
A.
NaCN
NaCN reagent is used to extract silver from Ag2S as :
+ 2Na[Ag(CN)2] + Na2S + ZnNa2[Zn(CN)4] + 2Ag