The dentists use β¦β¦β¦β¦.. mirror to see large images of teeth of patients
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52%
Concave
42%
Convex
4%
Plane
2%
None
π7π3π₯2
Power of convex lens is positive and concave lens is
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79%
Negative
15%
Positive
6%
Both
1%
None
π8π€©4π3π1
Forwarded from Shubham Jha - Class 11 & 12 (Shubham Jha)
π» My Gearsπ±
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π7
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π30π3
β¦ is an allotroph of carbon and is the hardest natural substance
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79%
Diamond
11%
Graphite
6%
Silver
4%
Fullerene
π17π₯°1
Metals above hydrogen in the activity series can displace β¦β¦β¦ from dilute acids.
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51%
Hydrogen
26%
Helium
13%
Lithim
10%
Boron
π€©9β€4π3π2π1
The extraction of metals from their ores and then refining them for use is known as β¦β¦
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20%
Sonorous
22%
Ductility
51%
metallurgy
6%
None.
π11π₯°2β€1π₯1
Metals which are so soft that they can be cut with a knife are β¦β¦
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55%
Na
23%
Mg
12%
Al
10%
Si
π9π₯3β€2π2π2π₯°1
A non-metal which is lustrous is β¦β¦β¦
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24%
Sodium
35%
Iodine
17%
Silver
24%
Diamond
π9π₯°3π₯2