The basic structural unit of silicates is
SiO-
SiO24-
SiO32-
SiO32-
B.
SiO24-
The basic building unit of all silicates is the tetrahedral SiO44- it is represented as
Structure of the compound whose IUPAC name is 3-ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid is
The order of stability of the following tautomeric compound is
I>Ii>III
III > II>I
Ii> I> III
Ii> I> III
The radical because it has
6 p -orbitals and 6 unpaired electrons
7 p- orbitals and 6 unpaired electrons
7 p- orbitals and 7 unpaired electrons
7 p- orbitals and 7 unpaired electrons
What is the activation energy for a reaction if its rate doubles when the temperature is raised from 200C to 350C ?(R=8.314 J mol-1 K-1).
342 kJ mol-1
269 kJ mol-1
34.7 kJ mol-1
34.7 kJ mol-1
At 250 molar conductance of 0.1 molar aqueous solutions of ammonium hydroxide is 9.54 ohm-1 cm2 mol-1 and at infinite dilution, its molar conductance is 238 ohm-1 cm2 mol-1. The degree of ionisation of ammonium hydroxide at the same concentration and temperature is
2.080%
20.800%
4.008%
4.008%
A button cell used in watches functions as following
The cell potential will be
1.10 V
0.42 V
0.84 V
0.84 V