Which of the given properties is generally not shown by metals?
Anonymous Quiz
21%
Electrical conduction
17%
Ductility
47%
Dullness
14%
Sonorous
👍8❤2
The ability of metals to be drawn into thin wire is known as
Anonymous Quiz
39%
Ductility
42%
Malleability
14%
Sonorous
5%
None
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Generally metals react with acids to give salt and hydrogen gas. Which of the given acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
Anonymous Quiz
32%
H2so4
25%
Hcl
25%
Hno3
18%
Alll
👍8
Galvanisation is a method of protecting iron from rusting by coating with a thin layer of
Anonymous Quiz
21%
Gallilum
29%
Alluminium
45%
Zinc
5%
Silver
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If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of
Anonymous Quiz
30%
Cuso4
38%
Cuco3
23%
Cuo
9%
All
👍9🤩2
An object is placed at a distance of 0.25 m
in front of a plane mirror. The distance between the object and image will be
in front of a plane mirror. The distance between the object and image will be
Anonymous Quiz
47%
0.25m
19%
1.0m
29%
0.5m
6%
1.25m
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The angle of incidence for a ray of light having zero reflection angle is
Anonymous Quiz
55%
0
16%
30
11%
45
18%
90
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A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by
Anonymous Quiz
40%
15
23%
20
23%
30
13%
0
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A concave mirror of focal length 20 cm forms an image having twice the size of object. For the virtual position of object, the position of object will be at
Anonymous Quiz
17%
25cm
37%
40cm
22%
10cm
24%
Infinty
👍4🔥2
if a man’s face is 25 cm in front of concave shaving mirror producing erect image 1.5 times the size of face, focal length of the mirror would be
Anonymous Quiz
27%
75cm
39%
25cm
26%
15cm
9%
60cm
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Forwarded from Shubham Jha - Class 9
YouTube
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Let's Make Numerical Super Easy - https://www.unacademy.com/a/Thursday-thrill-physics-numericals-SSC-9.html
Code - SJSUPER10
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---------------------------------------------------------------
Let's Make Numerical Super Easy - https://www.unacademy.com/a/Thursday-thrill-physics-numericals-SSC-9.html
Code - SJSUPER10
--------------------------------------------…
👍1👏1
In which mode of nutrition an organism de-rives its food from the body of another living organism without killing it?
Anonymous Quiz
31%
Parasatic
36%
Saprophytic
19%
Holozoic
14%
Autotrophic
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The mode of nutrition found in fungi is:
Anonymous Quiz
24%
Parasatic
16%
Holozoic
45%
Saprophytic
15%
Autotrophic
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