Question 1. What are canal rays? Answer: Canal rays are positively charged radiations which led to the discovery of positively charged sub-atomic particle called proton. Question 2. If an atom contains one electron and one proton, will it carry any charge or not? Answer: The atom will be electrically neutral as one – ve charge balances one + ve charge. Question 1. On the basis of Thomson’s model of an atom, explain how the atom is neutral as a whole. Answer: According to Thomson’s model of an atom (i) An atom consists of a positively charged sphere and the electrons are embedded in it, (ii) The negative and positive charges are equal in magnitude. So the atom is electrically neutral. Question 2. On the basis of Rutherford’s model of an atom, which sub-atomic particle is present in the nucleus of an atom? Answer: As per Rutherford’s model of an atom, the protons which are positively charged are present in the nucleus of an atom. Question 3. Draw a sketch of...
Reported Speech 1. There are two different ways in which we can report the words of a speaker : (a) Direct Speech or Direct Narration. (b) Indirect Speech or Indirect Narration. (a) Direct Speech contains the actual words of the speaker ; as— Krishna said, “My father has a roaring business in Mumbai.” She said to me, “I am feeling unwell today.” In these sentences, actual words of the speaker are given within inverted commas without any change. (b) Indirect Speech gives the substance of the speaker’s actual words and not the exact words spoken by him or her ; as— Krishna said that his father had a roaring business in Mumbai. She told me that she was feeling unwell that day. The actual words of the speaker, given within ‘inverted commas’ are called the Reported Speech. In the same way, the Verb which introduces the Reported Speech is called the Reporting Verb. In the sentence above ‘said’ is the Reporting Verb and ‘My father has a roaring business in Mumbai’ is the Reported Speech....