General Science Class 9 MCQS

Which one of the following act as oxidizing agent?

1. Be
2. Mg
3. Na
4. Cl

Which gas can turn lime water milky?

1. O2
2. NO2
3. CO2
4. N2

Which compound is known as lunar caustic?

1. KNO3
2. AgNO3
3. NaOH
4. NaNO3

All accurately known digits and first doubtful digit in an expression are known as?

1. Non-significant figures
2. Significant figures
3. Estimated figures
4. Crossed figures

Centrifugal force is always directed :

1. Towards centre
2. Away from centre
3. Along the circular path
4. All sides