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  B 1. Which two phrases in the poem tell us that the poet is recalling childhood memories? Answer: The 1st and the last phrases recall childhood memories. 2. How do we know that the customers at Ma Branch's shop were mostly poor? Answer: Most of the customers get their household chores and pay the money later to the shopkeepers. They are maintaining diaries. On that basis, we can say that most of the customers are poor. 3. Where did Ma Branch position herself? Answer: We consider that Ma Branch was a good shopkeeping store. The behavior of the seller was quite comfortable with the customer. Therefore during later years Ma Branch has improved and consequently shifted to Super Market. 4. Why do you think the poet said no one ever took her for granted? Answer: Both the lady sellers were genuine and workaholics. They used to sell their shops product with the accurate amount and weight without spending more time. They got this habit by day-to-day practicing. That's why customers li...

Q 7 d) What is Thomson's plum pudding model? Answer:  Thomson knew that atoms had an overall neutral charge. Therefore, he reasoned that there must be a source of positive charge within the atom to counterbalance the negative charge on the electrons. This led Thomson to propose that atoms could be described as negative particles floating within a soup of diffuse positive charge. This model is often called the plum pudding model of the atom, due to the fact that its description is very similar to plum pudding, a popular English dessert (see image below). Q- 8 a) Explain the discovery of electrons. Ans:  What are Electrons? Electrons are subatomic particles that hold an elementary charge of magnitude -1. The charge of an electron is equal in magnitude to the charge held by a proton (but has an opposite sign). Therefore, electrically neutral atoms/molecules must have an equal number of electrons and protons. Although the magnitude of the charges held by protons and electrons are ...

  Q7. Give reason for the following. a) The oxygenated and deoxygenated blood in the heart does not get mixed? Answer:  The heart has four chambers two atria and two ventricles. The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle. The right ventricle pumps the oxygen-poor blood to the lungs. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle. The left ventricle pumps oxygen-rich blood to the body. The one-way valves present in the heart prevent the backflow of blood, so, O 2   rich and CO  2   rich blood can not be mixed. b) A person with blood group O is called a universal donor. Answer: People with type O- blood are called universal donors because their donated red blood cells have no A, B, or Rh antigens and can therefore be safely given to people of any blood group. ... Their plasma does not contain A or B antibodies and can be transfused safely to all blood types. c) A perso...