In nuclear explosion, the energy is released in the form of :
kinetic energy
electrical energy
potential energy
None of these
Which one of the following aqueous solutions of salts has the lowest pH value ?
CH3COONa
NaCl
NH4OOCCH3
NH4Cl
D.
NH4Cl
NH4 Cl is a salt of a weak base (NH4OH) and strong acid (HCl) , thus undergoes cationic hydrolysis and provides H+ ions that make the solution acidic i.e. , pH is very less or less than 7 .
NH4Cl + H2O NH4OH + HCl
or NH4+ + H2O NH4OH + H+
Methoxy methane and ethanol are :
positionl isomers
chain isomers
functional isomers
optical isomers
KI and CusO4 solution when mixed gives :
CuI2 + K2SO4
Cu2I2 + K2SO4 + I2
K2SO4 + Cu2I2 + I2
K2SO4 + CuI2 + I2
The end product in the sequence would be
C3H7OH A B C
CH3-CCH
CH3-C(OH)=CH2
CH2=C=CH2
CH3-CH(OH)-CH2(OH)
Which of the following electrolytic solutions has the least specific conductance ?
0.02 N
0.2 N
2 N
0.002 N
Which of the following can be measured by the Ostwald-Walker dynamic method ?
Relative lowering of vapour pressure
Lowering of vapour pressure
Vapour pressure of the solvent
All of the above
Lanthanides and actinides are also called :
short periods
inner-transition elements
long periods
main transition elements