19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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
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 gas that cannot be collected over water is
Standard sodium thiosulphate solution is used in the estimation of iodine present in a solution. The equivalent weight of sodium thiosulphate which is required to make the standard solution is
When SO2 gas is passed into an acidified solution of K2Cr2O7, the oxidation state of chromium changes
Which of the following ions does not have an S—S linkage?
H2SO4 is manufactured from SO2(g) by the
Dehydration of concentrated H2SO4 in the presence of P4O10 produces
Which of the following gases may act both as an oxidizing and a reducing agent?
Sulphur dioxide reacts with chlorine in the presence of charcoal (which acts as a catalyst) to give
H2S is less stable than H2O because
Which of the following compounds is thermodynamically unstable?
H2S turns an acidified KMnO4 solution