19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The number of S—S bonds in sulphur trioxide trimer S3O9 is:
Which of the following does not have S—S linkage? (a) S O (b) S O (c) S O (d) S O
Which is not correct regarding the Holme’s signal?
In how many of the following number of lone at central atom is zero XeO3, XeO2F2, XeO4, XeO3F2, XeO3F6 ? (AIIMS2019)
Which of the following inert gas participate in chemicals reaction? (AIIMS 2019)
Which of the following statements is not true for halogens? (NEET 2019)
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)
What is X and Y in the above reaction? (AIIMS 2019) (Excess) (Excess) 8NH 3Cl X NH 3Cl Y -> ->
Affinity for hydrogen decreases in the group from fluorine to iodine. Which of the halogen acids should have highest bond dissociation enthalpy? (AIIMS 2019)
The species that is not hydrolysed in water is (KCET 2014)
The statement that is not correct is (KCET 2014)
Bleaching powder loses its power on keeping for a long time because (KCET 2013)
The compound represents phosgene is (Manipal 2013)
The increases order of reducing power of halogen acid is (Manipal 2013)
Aqueous solutions of hydrogen sulphide and sulphur- dioxide when mixed together, yield (KCET 2013)
The correct order of relative acidity is (UP CPMT 2013)
In pyrophosphoric acid the number of hydroxyl groups are (UP CMT 2013)
The mixture of concentrated HCl and HNO3 made in 3 : 1 ratio contains (AIIMS 2013)
Which of the following is not a peroxyl acid? (Manipal 2012)
When a colorless gas is passed through bromine water, only decolourisation takes places. The gas is (AFMC 2012)
When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from (CBSE AIPMT 2012) (a)zero to +1 and zero to –5
Which one of the following statements is not valid for oxoacids of phosphorous? (Manipal 2012)
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