Subject :NSO Class : Class 8
Read the given statements and select the correct option.
Statement 1 : Silver objects become green and lose their shine with the passage of time.
Statement 2 : Silver reacts with carbon dioxide and moisture present in the atmosphere.
A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true and statement 2 is false.
D Both statements 1 and 2 are false.
Ans 1:
Class : Class 8
Ans 2:
Class : Class 7
Silver turns black, not green. And also silver does not react with water. So, obviously D is the answer.
Ans 3:
Class : Class 5
Silver can also react with SO2, sulphur dioxide, to tarnish.
Ans 4:
Class : Class 9
ans D is the correct answer as silver turns black after reaction to hydrogen sulphide