19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Oxidation state of nitrogen is correctly given for Compound Oxidation State
+3 oxidation state is most common in
Oxidation number of iodide in IO ,IO ,KI and I respectively, are
When sulfur dioxide is passed in an acidified K₂Cr₂O₇ solution, the oxidation state of sulfur is changed from
The oxidation states of iodine in HIO₄, H₃IO₅ and H₅IO₆ respectively, are
In which of the following reactions, there is no change in valency? (a) SO 2H S 2H O 3S → (b) 2Na O 2Na O → (c) Na O H SO Na SO H O → (d) 4KClO 3KClO KCl → Ans (c) Sol. The oxidation states of central atom in each giv…
A metal ion M3+ loses 3 electrons, its oxidation number will be :
Which of the following molecules has least oxidation number of central atom?
In which of the compounds does manganese exhibit highest oxidation number?
In which of the following compounds, the oxidation number of iodine is fractional?
In which of the following compounds is the oxidation state of C a fraction?
In which of the following compounds is the oxidation state of C highest?
The oxidation states of the most electronegative elements in the products of the reaction between BaO₂ and H₂SO₄ are
Oxidation number of carbon in CCl is :
The oxidation number of C in CH₂O is
Which one of the following reaction involves oxidation- reduction?
The oxidation state of Fe in Fe₃O₈ is
In which of the following processes is nitrogen oxidized? (a) NH N → (b) NO NO → (c) NO NO → (d) NO NH → Ans (a) Sol. o NH N → Oxidation state of N = -3 Oxidation state of N = 0 In the other reaction, the oxidation st…
Phenols contains acidic H it reacts with KOH.
Which of the following observations is correct and is used in the identification of carboxylic acids?
An organic compound is heated with HNO₂ at 0 °C and then the resulting solution is added to a solution -napthol whereby a brilliant red dye is produced. The observations indicate that the compound possesses.
The most suitable method of separation of 1: 1 mixture of ortho and para-nitrophenols is (NEET 2017)
Paper chromatography is an example of : (NEET 2020)
In the Lassaigne’s test for the detection of nitrogen in the organic compound, the appearance of blue coloured compound is (West Bengal PMT 2015)
To separate a mixture of amines from each other, one should follow: