19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
When conc. H2SO4 is heated with P2O5 the acid is converted to (UP CPMT 2012)
Which of the following statements is correct for the iodine molecule?
All the halogens are coloured. The colours arise due to
Which one among the following is the most powerful oxidizing agent?
Which of the following halogens has only one oxidation state of –1 in an aqueous solution?
Which of the following elements can have both positive and negative oxidation states?
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)
In which on of the following arrangements the given sequence is not strictly according to the properties Indicated against it? (NEET 2021)
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)
In which of the following, oxidation state of phosphorus is +3? (JIPMER 2019)
Which of the following oxoacids of phosphorus has strongest reducing property? (NEET (Odisha)2019)
Identify the incorrect statement related to PCl5 from the following: (NEET 2019)
Which of the following rare gas is the abundant in air? (JIPMER 2019)
Yellow colour of chlorine water fades because of (AIIMS 2019)
Correct order of bond dissociation energy is (AIIMS 2019)
Which of the following statement is correct for oleum? (AIIMS 2019)
Which is the correct order of thermal stability for H2E (E = O, S, Se, Te and Po)? (NEET 2019) (a) H O H S H Se H Te H Po (b) H Po H Te H Se H S H O (c) H Se H Te H Po H O H S (d) H S H O H Se H Te H Po
Among the following, the correct formula of Marshall’s acid is (JIPMER 2018)
Conversion of oxygen into ozone is non-spontaneous at (AIIPMT 2018)
Which of the following pair behaves as strong and weak base hydride respectively? (JIPMER 2018)
Which of the following chemicals are used to manufacture methyl isocyanate that caused “Bhopal Gas Tragedy” ? (JIPMER 2018) (i) Methylamine (ii) Phosgene (iii) Phosphine (iv) Dimethylamine
The correct order of N-compounds in its decreasing order of oxidation states is (NEET 2018)
Which of the following oxyacid does not contain P–O– P bond? (AIIMS 2018)
The species that is not hydrolysed in water is (KCET 2014)
The statement that is not correct is (KCET 2014)