Question

When metallic copper comes in contact with moisture, a green powder/pasty coating can be seen over it. This is chemically known as

Solution

Correct option is

Copper carbonate – Copper hydroxide

 

SIMILAR QUESTIONS

Q1

Zinc does not show variable valency like d-block elements because

Q2

Which of the following statements is not true in regard to transition elements?

Q3

The catalytic activity of the transition metals and their compounds is ascribed to their

Q4

Cuprous ion is colourless, while cupric ion is coloured because

Q5

 

Of the ions Zn2+, Ni2+ and Cr3+,

(atomic number of Zn = 30, Ni = 28, Cr = 24)

Q6

In which of the following metallic bond is strongest?

Q7

Which of the following ions has the highest magnetic moment?

Q8

Which of the following elements has the maximum first ionization potential?

Q9

Excess of KI reacts with CuSO4 solution and then Na2S2O3 solution is added to it. Which of the statement is incorrect for this reaction?

Q10