The blue flame in the below image represent the burning which metal
Anonymous Quiz
24%
Iron
32%
Copper
26%
Sodium
17%
All
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Disloving suger is an example of
Anonymous Quiz
45%
Physical change
43%
Chemical change
10%
Redox reaction
3%
None
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A compund used for white washing
Anonymous Quiz
34%
Quick lime
28%
Slaked lime
17%
Blue vitrol
21%
Limestone
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After wound or cut in a body blood cogulates through
Anonymous Quiz
20%
Wbc
29%
Rbc
39%
Platelets
12%
Plasma
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An object is placed 20 cm in front of a plane mirror. The mirror is moved 2 cm towards the object. The distance between the positions of the original and final images seen in the mirror is:
Anonymous Quiz
20%
2
34%
4
28%
10
17%
22
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Which position of the object will produce a magnified virtual image, if a concave mirror of focal length 15 cm is being used?
Anonymous Quiz
20%
10
35%
20
37%
30
8%
35
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A ray of light that strikes a plane mirror PQ at an angle of incidence of 30o, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is:
Anonymous Quiz
23%
30
37%
45
30%
60
9%
90
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a lens of focal length 12 cm forms an erect image, three times the size of the object. The distance between the object and image is:
Anonymous Quiz
22%
8
31%
16
29%
32
18%
24
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an object is placed 21 cm from a converging lens, the image formed is slightly smaller than the object. If the object is placed at a distance of 19 cm from the lens, the image formed is slightly larger than the object. The approximate focal lengths
Anonymous Quiz
25%
5
37%
10
24%
15
14%
20
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