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Grade: 6
        
Read the following statement and explanation and answer as per the options given below :
Assertion : A very dilute acidic solution of Cd^2+ and Ni^2+ gives yellow precipitate of CdS on passing hydrogen sulphide.
Statement :  Solubility product of CdS is more than that of NiS
a. If both assertion and statement are correct and statement is an explanation of assertion.
b. If assertion is correct and statement is wrong, statement is not an explanation of assertion.
c. If assertion is wrong and statement is correct, statement is not an explanation of assertion.
d. If both assertion and statement are wrong and statement si not explanation of assertion.
4 years ago

Answers : (1)

Jitender Pal
askIITians Faculty
365 Points
							(d) Cd^2+ is a 2nd group radical and
Ni^2+ is a 4th group radical. So solubility product of NiS has to be
more than CdS. Further Cd^2+ gives yellow colour of CdS with H base 2S, but
Ni^2+ gives black colour of NiS with H base 2S. So both assertion and statement
are wrong. (d) is 
						
4 years ago
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