19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The oxidation number of nitrogen in NaNO₂ is
The oxidation state of chromium in Cr(CO)₆ is:
Oxidation number of nitrogen in (NH₄)₂SO₄ is
In the following equation MnO₂ acts as MnO 2H O 2e MnO 4OH →
Assertion (A): SO₂ and Cl₂ are both bleaching agents Reason (R): Both are reducing agents
Assertion (A): H₂O₂ can acts as an oxidizing agent. Reason (R): All the peroxides behave as oxidizing agents only.
In the reaction 2FeCl H S 2FeCl 2HCl S →
In the reaction 3Br 6CO 3H O 5Br BrO 6HCO →
In the reaction o 5 2 3Cl 6NaOH Na ClO 5Na Cl 3H O → The element which loses as well as gains electrons is
The number of electrons lost in the following change is Fe H O Fe O H →
Which of the following is the best description of the behaviour of bromine in the reaction given below? o H O Br HOBr H Br →
In the reaction o o ½ K O KO →
In the reaction, SO 2H S 3S 2H O → the substance oxidized is
In which of the following is the highest oxidation state not possible?
A metal ion M3+ loses 3 electrons, its oxidation number will be :
In which of the following compounds, the oxidation number of iodine is fractional?
Which of the following compounds will answer Lassaigne’s test for nitrogen
Which of following will give Lassaigne’s test for nitrogen
Which of the following observations is correct and is used in the identification of carboxylic acids?
Phenols contains acidic H it reacts with KOH.
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.
Which of the following test can use for separation of alcohol and phenol?
An organic compound which produces a bluish green coloured flame on heating in presence of copper is (AIIMS 2014)
Paper chromatography has following mobile and stationary phases respectively (Bihar CECE 2015)
Camphor is purified by (Kerala PMT 2014)