Question

The salts of $$Cu$$  in +1 oxidation state are unstable because

A. $$C{u^ + }$$  has $$3{d^{10}}$$  configuration
B. $$C{u^ + }$$  disproportionates easily to $$Cu\left( 0 \right)$$  and $$C{u^{2 + }}$$  
C. $$C{u^ + }$$  disproportionates easily to $$C{u^{2 + }}$$  and $$C{u^{3 + }}$$
D. $$C{u^ + }$$  is easily reduced to $$C{u^{2 + }}$$
Answer :   $$C{u^ + }$$  disproportionates easily to $$Cu\left( 0 \right)$$  and $$C{u^{2 + }}$$
Solution :
$$C{u^ + }$$  ions undergo disproportionation, $$2C{u^ + } \to C{u^{2 + }} + Cu$$

Releted MCQ Question on
Inorganic Chemistry >> D and F Block Elements

Releted Question 1

When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volume of hydrogen evolved is

A. $$1:1$$
B. $$1:2$$
C. $$2:1$$
D. $$9:4$$
Releted Question 2

Which of the following is the weakest base

A. $$NaOH$$
B. $$Ca{\left( {OH} \right)_2}$$
C. $$KOH$$
D. $$Zn{\left( {OH} \right)_2}$$
Releted Question 3

One of the constituent of German silver is

A. $$Ag$$
B. $$Cu$$
C. $$Mg$$
D. $$Al$$
Releted Question 4

Which of the following dissolve in hot conc.$$NaOH$$  solution

A. $$Fe$$
B. $$Zn$$
C. $$Cu$$
D. $$Ag$$

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D and F Block Elements


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