The white solid, lead carbonate is heated and decomposes into yellow coloured lead oxide and carbon dioxide. So, “X” is lead oxide.
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Try to understand – nA = sin i/sin r = sin 45°/sin 45° = 1 nB = sin i/sin r = sin 45°/sin 45° = 1/√2 x 2/1 = √2 = 1.414
As the volume increases, (as shown by the part ‘X’ of the graph), causing inspiration and it will cause the air from outside to rush inside the lungs. Increasing the volume of lungs, happens when Contraction of the diaphragm muscles ...
Class 10th Science Session 2022-23 Class 10 Science Terminal Exams MCQ Solutions Class X Science MCQ Extra Questions Answers 10th Science Terminal Exam Based MCQ Extra Questions
Copper oxide is black in colour. When dilute hydrochloric acid is added in it, the colour of the solution becomes blue green due to formation of copper chloride.