Q5 of 70 Page 105

On addition of sm

The following reaction happens when KMnO4 reacts with concentrated H2SO4. The product formed Mn2O7 is a green oily compound.


2KMnO4 + 2H2SO4 → Mn2O7 + 2KHSO4 + H2O

More from this chapter

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3

Metallic radii of some transition elements are given below. Which of these elements will have highest density?

Element Fe Co Ni Cu


Metallic 126 125 125 128


radii/pm


 4

Generally transition elements form coloured salts due to the presence of unpaired electrons. Which of the following compounds will be coloured in solid state?

 6

The magnetic nature of elements depends on the presence of unpaired electrons. Identify the configuration of transition element, which shows highest magnetic moment.

 7

Which of the following oxidation state is common for all lanthanoids?