d and f Block Elements
W and X are, respectively
Y and Z are , respectively
|(B)||PdCl2||(ii)||Ziegler − Natta polymerization|
Acidified K2Cr2O7, alkaline KMnO4, CuSO4, H2O2, Cl2, O3, FeCl3, HNO3 and Na2S2O3.
The total number of reagents that can oxidise aqueous iodide to iodine is
Which of the following arrangements does not represent the correct order of the property stated against it ?
Four successive members of the first row transition elements are listed below with atomic numbers. Which one of them is expected to have the highest value ?
KMnO4 can be prepared from K2MnO4 as per the reaction:
The reaction can go to completion by removing OH− ions by adding:
Assertion Mercury vapour is shining silvery appearance.
Reason Mercury is a metal with shining silvery appearance.
Assertion The free gaseous Cr atom has six unpaired electrons.
Reason Half-filled s-orbital has greater stability.
Assertion : Atomic size of silver is almost equal to that of gold.
Reason : d-subshell has low penetration power and produce poor shielding.
(A) Heating NH4NO2
(B) Heating NH4NO3
(C) Mg3N2 + H2O
(D) Na(comp.) + H2O2