19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The mixture of concentrated HCl and HNO3 made in 3 : 1 ratio contains (AIIMS 2013)
The gaseous product formed when HOCl reacts with H2O2 in acidic medium is (Kerala CEE 2014)
Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is shown by one of these compounds, but not by the other? (CBSE AIPMT 2015)
Which of the following oxide is most acidic? (JIPMER 2017)
Among the following compounds, which will produce POCl3 with PCl5? (JIPMER 2017)
In which of the following compounds, sulphur show maximum oxidation number? (JIPMER 2017)
Name the gas that can readily decolourise acidified KMnO4 solution. (NEET 2017)
A gas ‘X’ is used in filling balloons for meteorological observations. It is also used in gas-cooled nuclear reactors. Here, the gas X is (AIIMS 2018)
Xenon hexafluoride reacts with silica to form a xenon compound X. The oxidation state of xenon in X is (JIPMER 2018)
In which of the following arrangements, the order is not strictly according to the property written against it? (AIIMS 2018)
Which of the following products will be obtained when copper metal is reacted with HNO3? (AIIMS 2018)
Which of the following oxyacid does not contain P–O– P bond? (AIIMS 2018)
A green yellow gas reacts with an alkali metal hydroxide to form a halite which can be used in fireworks and safety matches. The gas and halite are, respectively (AIIMS 2019)
Which of the following statements is not true for halogens? (NEET 2019)
Which of the following inert gas participate in chemicals reaction? (AIIMS 2019)
In how many of the following number of lone at central atom is zero XeO3, XeO2F2, XeO4, XeO3F2, XeO3F6 ? (AIIMS2019)
Which of the following rare gas is the abundant in air? (JIPMER 2019)
Identify the incorrect statement related to PCl5 from the following: (NEET 2019)
A compound ‘X’ upon reaction with H2O produced a colourless gas ‘Y’ with rotten fish smell. Gas ‘Y’ is absorbed in a solution of CuSO4 to give Cu3P2 as one of the products. Predict the compound ‘X’ (NEET (Odisha)2019)
Which of the following oxoacids of phosphorus has strongest reducing property? (NEET (Odisha)2019)
In which of the following, oxidation state of phosphorus is +3? (JIPMER 2019)
Urea reacts with water to form A which will decomposes to form B. B when passed through Cu2+ (aq), deep blue color solution C is formed. What is the formula of C from the following. (NEET 2020)
The element which forms oxides in all oxidation states +I to + V is :
The number of lone pairs and the number of S—S bonds in S8 molecules are respectively:
Which of the following statements regarding sulphur is incorrect?