Class 10 Science important Questions
Q1. What Change Should Be Made in an A.C. Generator So that It May Become a D.C. Generator?
Ans: By replacing the slip rings of an A.C. generator by a commutator, we can convert it into a D.C. generator.
Q2. What is meant by an addition reaction? Give an example.
Ans:
An addition reaction is an organic reaction where two or more molecules combine to form a larger one.
Eg: Ethene on reaction with Cl2 gets converted into C2H4Cl2
Q3. Show the formation of MgO by the transfer of electrons between combining atoms.
Ans:
The atomic number of magnesium is 12 and its electronic distribution is 2, 8, 2. Whereas an atomic number of oxygen is 8 and its electronic distribution is 2, 6.Therefore, in order to completely fill the octet oxygen will gain two electrons from magnesium. Thus, there will be the formation of an ionic bond between magnesium and oxygen.
