This is a timed quiz. You will be given 120 seconds to answer all questions. Are you ready?
120
Washing soda is the common name for?
Correct!
Wrong!
Brass gets discolored in air because of the presence of which of the following gases in air?
Correct!
Wrong!
Permanent hardness of water can be removed by adding?
Correct!
Wrong!
The most important ore of aluminium is?
Correct!
Wrong!
Which of the following is used in pencils ?
Correct!
Wrong!
Which of the following does not contain a coinage metal?
Correct!
Wrong!
From which mineral is radium obtained?
Correct!
Wrong!
Amalgams are?
Correct!
Wrong!
Science Quiz 143
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