Class 9 Chemistry MCQ
Formation of water form hydrogen and oxygen is:
Redox reaction
Acid-base reaction
Neutralization
Decomposition
Cu + 2AgNO3 ——-> Cu(NO3) +2Ag. In this reaction reducing agent is:
Cu
AgNO3
Cu(NO3)2
Ag
NaOH is prepared by ____________ of NaCL (aqueous).
Electrolysis
Decomposition
A & B
Nil
Copper extracted from its ore is ____________ % pure.
98%
99%
96%
Nil
Which is used for industrial manufacture of NaCI?
Daniel cell
(‘radio-button-click-target–correctquestions’, “Down’s cell”)(‘radio-button-click-target’, “Nelson’s cell”)
None of these
Nelson’s cells used to prepare caustic soda along with gases. Which of the following gas is produced at cathode?
CI2
H2
O3
O2