Which of the following is/are chemical changes?
Anonymous Quiz
15%
Cooking of food
25%
Ripening of fruit
52%
Both (a) & (b)
9%
Evaporation of water
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Which of the following is/are products formed ; reaction of coal with oxygen ?
Anonymous Quiz
60%
CO2
8%
O2
26%
Both (a) & (b)
6%
CO
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Complete the reaction:
CuSO4 + ___ —> ZnSO4 + ___
CuSO4 + ___ —> ZnSO4 + ___
Anonymous Quiz
21%
Cu , Zn
69%
Zn , Cu
4%
S , Cu
6%
Zn , S
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In a chemical reaction, Reactants are on __ side as products are on _____ side.
Anonymous Quiz
77%
Left , right
16%
Right , Left
7%
Both are correct
1%
None
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In a chemical reaction, Liquid state is represented by _______.
Anonymous Quiz
43%
l
37%
aq
16%
Both are correct
4%
None of these
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Heredity is passing on of ____ characteristics genetically from one generation to another.
Anonymous Quiz
32%
physical
8%
mental
55%
Both (a) & (b)
5%
None
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Which of the following is/are present in pairs?
Anonymous Quiz
13%
Gene
16%
DNA
67%
Chromosomes
3%
None
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DNA is made up of ______
Anonymous Quiz
15%
Pentose Sugar
13%
Phosphate
15%
Nitrogen bases
57%
All of these
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In RNA , instead of thymine it has ________
Anonymous Quiz
20%
Adenine
60%
Uracil
15%
Cytosine
5%
Guanine
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Which of the following is single stranded?
Anonymous Quiz
59%
RNA
11%
DNA
24%
Both (a) & (b)
5%
None
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____ is a process in which one organism produces another organisms of its own kind.
Anonymous Quiz
88%
Reproduction
5%
Diffusion
5%
Osmosis
2%
Respiration
____ Process is necessary for the existence of life on earth
Anonymous Quiz
65%
Reproduction
6%
Diffusion
5%
Osmosis
24%
Respiration
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