NSO Level 1- Science Olympiad (SOF) Class 8: Questions 495 - 499 of 1178
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Question 495
Question MCQ▾
Identify the names from the given clues
A synthetic fibre which looks like silk and obtained by chemical treatment of Wood pulp
Choices
Choice (4) | Response | |
---|---|---|
a. | Terylene | |
b. | Nylon | |
c. | Polyester | |
d. | Rayon |
Question 496
Question MCQ▾
Megha got a magnesium ribbon from the science lab. She burnt it, took the ash and mixed it in water. Then she tested the solution with a litmus paper. Red litmus paper turned blue. This shows that
Choices
Choice (4) | Response | |
---|---|---|
a. | The solution is neither acidic nor basic | |
b. | The solution is acidic in nature | |
c. | The solution is basic in nature | |
d. | Question does not provide sufficient data or is vague |
Question 497
Question MCQ▾
Sita bought a copper lamp as a decorative piece and displayed it in her show case. After a month she found that it looked dull with green patches on it. She was so shocked to see this. The Chemical reaction taken place here is
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
Question 498
Question MCQ▾
Bells are made of metals. Which property of metals is used here?
Choices
Choice (4) | Response | |
---|---|---|
a. | Metals are ductile | |
b. | Metals are lustrous | |
c. | Metals are malleable | |
d. | Metals are sonorous |
Question 499
Question MCQ▾
Identify the polymers from its use
It is used as pipes in plumbing and electric wiring.
Choices
Choice (4) | Response | |
---|---|---|
a. | Nylon | |
b. | Teflon | |
c. | PVC | |
d. | Polythene |