NIOS Class 10 Science and Technology Chapter 5:  ATOMIC STRUCTURE – Chapter-wise Important Questions and Answers

NIOS Class 10 Science and Technology Chapter 5: ATOMIC STRUCTURE | MCQs, Short & Long Answer Questions | 5. ATOMIC STRUCTURE

Chapter 5:  ATOMIC STRUCTURE

INTEXT QUESTIONS 5.1

1. Name two charged particles which constitute all matter.

Answer: The two charged particles that constitute all matter are electrons and protons .

2. Describe a cathode ray tube.

Answer: A cathode ray tube consists of two metal electrodes in a partially evacuated glass tube. The negatively charged electrode is called cathode while the positively charged electrode is called anode. These electrodes are connected to a high voltage source.

3. Name the negatively charged particles emitted from the cathode in the cathode ray tube?

Answer: The negatively charged particles emitted from the cathode in a cathode ray tube are electrons.

4. Why do the canal rays obtained by using different gases have different e/m values?

Answer: When the electrons emitted from the cathode collide with the neutral atoms of the gas present in the tube, these remove one or more electrons present in them. This leaves behind positive charged particles which travel towards the cathode. As the atoms of different gases have different number of protons present in them, these give positively charged ions with different e/m values.

---

Posted 1 week ago