1
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33
Which element can have oxidation state from 4 to 6?
2
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33
Which give coloured carbonate precipitate?
3
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33
Assertion : Out of $$\mathrm{CrO}_3$$ and $$\mathrm{Al}_2 \mathrm{O}_3, \mathrm{CrO}_3$$ having lower melting point than $$\mathrm{Al}_2 \mathrm{O}_3$$.
Reason : Oxidation state of $$\mathrm{Cr}$$ in $$\mathrm{CrO}_3$$ is high.
4
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33
Assertion : $$\mathrm{S}_2 \mathrm{O}_7^{2-}$$ and $$\mathrm{Cr}_2 \mathrm{O}_7^{2-}$$ both exist.
Reason : Both have same valence electrons.
Questions Asked from d and f Block Elements (MCQ (Single Correct Answer))
Number in Brackets after Paper Indicates No. of Questions
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