Which of the following oxides is most acidic?
Anonymous Quiz
23%
(a) CrO₃
53%
(b) Cr₂O₃
7%
(c) CrO
16%
(d) MnO
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Which ion is colourless in aqueous solution?
Anonymous Quiz
30%
(a) Ti³⁺
30%
(b) Cu²⁺
33%
(c) Zn²⁺
7%
(d) Ni²⁺
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Which of the following pairs shows diagonal relationship due to lanthanoid contraction?
Anonymous Quiz
18%
(a) Nb and Ta
52%
(b) Zr and Hf
24%
(c) Ti and Zr
7%
(d) Mo and W
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Cerium (Ce) is used as:
Anonymous Quiz
34%
(a) Oxidising agent in volumetric analysis
34%
(b) Catalyst in Haber’s process
20%
(c) Alloying element in stainless steel
11%
(d) Photographic developer
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Which actinide is used in nuclear reactors?
Anonymous Quiz
12%
(a) Thorium-232
50%
(b) Uranium-235
8%
(c) Plutonium-239
30%
(d) All of these
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KMnO₄ acts as an oxidising agent in acidic medium because:
Anonymous Quiz
33%
(a) Mn has +2 oxidation state in KMnO₄
52%
(b) Mn has +7 oxidation state in KMnO₄
7%
(c) It supplies nascent oxygen
9%
(d) It produces Mn²⁺ ions
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The unit of magnetic flux is:
Anonymous Quiz
39%
(a) Tesla
45%
(b) Weber
12%
(c) Tesla·meter
4%
(d) Henry
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Dear Science, 📊
When are your Pre-Boards starting?
When are your Pre-Boards starting?
Anonymous Poll
16%
Already Started
20%
Mid November
15%
November Last
49%
December 1st Week
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