Which one of the following statements is correct?
Manganese salt gives violet borax bead test in the reducing flame
Ferric ions give deep green precipitate on adding potassium ferrocyanide solution
On boiling a solution having K+, Ca2+, HCO3–ions, we get a precipitate of K2Ca(CO3)2
From a mixed precipitate of AgCl and AgI, ammonia solution dissolves only AgCl
AgI is insoluble in NH4OH but AgCl is soluble in NH4OH due to the formation of [Ag(NH3)2]Cl.
The colour of 62Sm3+ is yellow. The expected colour of 66Dy3+ is
The actinoids showing +7 oxidation state are
The lanthanoids contraction relates to
A reduction in atomic size with increase in atomic number is a characteristic of elements of
The most convenient method to protect bottom of ship made of iron is
Railway wagon axles are made by heating rods of iron embedded in charcoal powder. The process is known as
F2 is formed by reacting K2MnF6 with
Which of the following are d-block elements but not regarded as transition elements?