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- Review
- Question 1 of 30
1. Question
Supersonic jet causes pollution by thinning of
- Question 2 of 30
2. Question
Which type of reaction produces the most harmful radiation?
- Question 3 of 30
3. Question
Which type of glass is used for making glass reinforced plastic?
- Question 4 of 30
4. Question
Glycol is added to aviation gasoline because it
- Question 5 of 30
5. Question
Now-a-days yellow lamps are frequently used as street lights. Which of the following gases is used in these lamps?
- Question 6 of 30
6. Question
Lens is made up of
- Question 7 of 30
7. Question
Which of the following is responsible for the extra strength of pyrex glass?
- Question 8 of 30
8. Question
The addition of gypsum to Portland cement helps in :
- Question 9 of 30
9. Question
Hard steel contains
- Question 10 of 30
10. Question
Cement is formed by strongly heating a mixture of
- Question 11 of 30
11. Question
Glass is a
- Question 12 of 30
12. Question
The temperature of oxy-acetylene flame is around
- Question 13 of 30
13. Question
The Refrigerant ‘FREON’ is
- Question 14 of 30
14. Question
A balloon filled with helium rises in air because
- Question 15 of 30
15. Question
Cooking oil is converted into vegetable ghee by the process of-
- Question 16 of 30
16. Question
Rusting of iron requires –
- Question 17 of 30
17. Question
Glass is a –
- Question 18 of 30
18. Question
Uranium eventually decays into a stable isotope of –
- Question 19 of 30
19. Question
Which of the toxic heavy metals is found in modern tannery industries?
- Question 20 of 30
20. Question
Which of the following contains high content of lead?
- Question 21 of 30
21. Question
Stainless steel is an alloy of
- Question 22 of 30
22. Question
Raw materials used for the manufacture of glass are
- Question 23 of 30
23. Question
Which of the following is used in welding broken pieces of iron rails and machine parts?
- Question 24 of 30
24. Question
The BOD values of water indicate the
- Question 25 of 30
25. Question
The product used for manufacturing of Industrial alcohol is
- Question 26 of 30
26. Question
The metals commonly used for electroplating are
- Question 27 of 30
27. Question
Which of the following in automobile exhaust can cause cancer?
- Question 28 of 30
28. Question
In the absence of ozone layer, which rays will enter into atmosphere?
- Question 29 of 30
29. Question
Cement is usually a mixture of:
- Question 30 of 30
30. Question
Electric bulbs are filled with :