19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Among the following, the element that does not show allotropy is
The element which forms oxides in all oxidation states +I to + V is :
The most stable oxidation states of nitrogen are
In pyrophosphoric acid the number of hydroxyl groups are (UP CMT 2013)
The correct order of relative acidity is (UP CPMT 2013)
Aqueous solutions of hydrogen sulphide and sulphur- dioxide when mixed together, yield (KCET 2013)
The increases order of reducing power of halogen acid is (Manipal 2013)
The compound represents phosgene is (Manipal 2013)
Bleaching powder loses its power on keeping for a long time because (KCET 2013)
The statement that is not correct is (KCET 2014)
The species that is not hydrolysed in water is (KCET 2014)
The correct arrangement of following acids of phosphorus in the increasing order of oxidation state of phosphorus is (Guj CET 2014)
Acidity of diprotic acids in aqueous solutions increases in the order (CBSE AIPMT 2014)
Which among the following group 16 elements exists in more than two allotropic states? (JCECE 2014)
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)