An element X is divalent and another element Y is tetravalent. The compound formed by these two elements will be:
Anonymous Quiz
37%
XY
34%
XY2
22%
X2Y
6%
XY4
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Which of the following does not match the characteristics of an Isotope?
Anonymous Quiz
28%
Isotopes of some elements are radioactive
40%
Isotopes are the atoms of different elements
19%
Isotopes differ in number of neutrons
13%
Isotopes have similar chemical properties
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Which of the two will be chemically more reactive, Sulphur(S) with atomic number 16 or Chlorine (Cl) with atomic number 17?
Anonymous Quiz
30%
Chlorine
34%
Sulphur
30%
Both are equally reactive
6%
Can't say
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Which of the following elements does not exhibit the electrovalencey?
Anonymous Quiz
25%
Sodium
30%
Calcium
33%
Carbon
12%
Chlorine
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Which scientist gave the concept of fixed energy levels around the nucleus?
Anonymous Quiz
24%
Ernest Rutherford
40%
Neils Bohar
29%
J.J.Thomsan
6%
None of these
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Which of the following statement marks as a difference between plant cell and animal cell?
Anonymous Quiz
69%
Plant cells have cell wall which animal cells do not.
11%
Plant cells do not have vacuole while animal cells do have.
14%
Plant cells have only cell membrane while animal cells have both cell wall as well as cell membrane.
6%
Plant cells have more plastids while animal cells have few plastids.
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You must have observed that a fruit when unripe is green but it becomes beautifully coloured when ripe. According to you what is the reason behind this colour change.
Anonymous Quiz
51%
Chloroplasts change to chromosplasts
22%
Chromosplasts change to chromosomes
14%
Chloroplasts change to chromosomes
13%
Chromosplasts change to chloroplasts
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The process of plasmolysis in plant cell is defined as:
Anonymous Quiz
44%
Breakdown of plasma membrane in hypotonic solution.
41%
Shrinkage of cytoplasm in hypertonic medium.
9%
Shrinkage of Nucleoplasm.
6%
None of these.
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Where are the essential proteins and lipids required for cell
membrane, manufactured?
membrane, manufactured?
Anonymous Quiz
22%
Lysosome
17%
Chromosomes
50%
Endoplasmic reticulum
11%
Mitochondria
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Which of the following is not a function of the vacuole in plants?
Anonymous Quiz
28%
They store toxic metabolic wastes
46%
They help with the process of cell division
15%
They help to maintain turgidity
10%
They provide structural support
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________ is called the energy currency of the cell
Anonymous Quiz
12%
Endoplasmic reticulum
10%
Oxygen
52%
ATP
27%
Mitochondria
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Tissue is a group of similar kind of cells specialized to perform a particular function in the body. Therefore presence of tissues in a multicellular organism ensures:
Anonymous Quiz
24%
Faster development
51%
Division of labour
14%
Higher reproductive potential
11%
Body strength
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