The solution of the complex [Cu(NH3)4]SO4 in water:
will give the test of Cu2+ ions
will give the test of NH3
will give the test of ions
will not give the tests of any of the above species
Conc. H2SO4 displaces hydrogen chloride from chlorides because:
it is stronger acid
sulphates are less soluble than chlorides
sulphates are more soluble than chlorides
HCl is a gas while H2SO4 is a liquid
Which one of the following represents d-block elements?
[Rn]6d2 , 7s2
[Xe]4f1 , 5d1 , 6s2
[Xe]4f14 , 5d1 , 6s2
[Xe]5d1 , 6s2
Pd has exceptional outer electronic configuration as 4d10 , 5s0. It belongs to:
4th period , group 11
5th period , group 10
6th period , group 9
3th period , group 16
The rate of reaction , 2NO + Cl2 2NOCl becomes double when the concentration of Cl2 is doubled. However, when the concentration of both the reactants is doubled the rate becomes eight times. What is order of the reaction?
First
Second
Third
Zero
How will the rate of reaction , 2NO + O2 2NO2 change, if the volume of the reaction vessel is doubled?
It will diminish to 1/4 of the initial value
It will diminish to 1/8 of the initial value
It will grow four times
It will grow eight times
B.
It will diminish to 1/8 of the initial value
When volume is doubled , concentration are halved ,
Hence, new rate =k
i.e. it is th of the initial value.
Which one of the following conditions will increase the voltage of the cell represents by the equation?
Cu (s) + 2Ag+ (aq) Cu2+ (aq) + Ag (s)
Increase in the concentration of Ag+ ions
Increase in the concentration of Cu2+ ions
Increase in the dimensions of silver electrode
Increase in the dimensions of copper electrode
During the electrolysis of the aqueous solution of copper sulphate using Pt electrodes , the reaction taking place at the anode is:
Cu2+ + 2e- Cu
Cu Cu2+ + 2e-
2H2O 4H+ + O2 + 4e-
H2O + e- OH- + H2