When copper oxide and dilute hydrochloric acid react, colour changes to
Anonymous Quiz
39%
White
38%
Green
14%
Black
9%
Pink
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Sodium hydroxide turns phenolphthalein solution
Anonymous Quiz
39%
Pink
27%
Yellow
32%
Colour less
2%
None
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The presence of β¦β¦β¦β¦. Ca in acids is responsible for their acidic properties.
Anonymous Quiz
64%
H+
21%
Oh-
9%
H-2
6%
None
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β¦β¦. is one of the raw materials for the production of baking soda.
Anonymous Quiz
43%
Naoh
38%
Nacl
10%
Hno3
10%
H2so4
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β¦. is the fixed number of water molecules chemically attached to each formula unit of a salt in its crystalline form.
Anonymous Quiz
64%
Water of crystallization
20%
Solid water
9%
Ice
6%
Dry ice
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When rays of light after reflection meet a point β¦β¦β¦β¦.. image is formed.
Anonymous Quiz
59%
Real
15%
Enlarged
24%
Virtual
2%
None
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The dentists use β¦β¦β¦β¦.. mirror to see large images of teeth of patients.
Anonymous Quiz
55%
Concave
37%
Convex
7%
Plane
1%
None
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_______ is ratio of height of image to height of object.
Anonymous Quiz
21%
Density
25%
Magnitude
51%
Magnification
3%
None
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Power of convex lens is positive and concave lens is β¦β¦β¦β¦β¦β¦
Anonymous Quiz
77%
Negative
15%
Positive
6%
Both
2%
None
π11π₯°1
π8β€2π2
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