19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following statements is true for the H3PO3 molecule?
The reaction of white phosphorus with aqueous NaOH gives phosphine and another phosphorus containing compound. The reaction type, the oxidation states of phosphorus in phosphine and other product are respectively:
Syrupy H3PO4 is viscous due to
White phosphorus reacts with concentrated HNO3 to give
Which one of the following is not an ore of phosphorus?
Platinum reacts with aqua regia to produce chloroplatinic acid represented by the formula
Gold reacts with aqua regia forming
Iodine reacts with concentrated HNO3 to produce
Phosphorus reacts with concentrated HNO3 to produce
At present, HNO3 is industrially prepared by the
Which of the following reactions gives reasonably pure NO?
Liquid N2O4 self-ionizes as
Which of the following oxides of nitrogen is a mixed anhydride of two acids?
Which of the following complexes is responsible for the brown colour of the ring formed in the ring test for the nitrates? (a)[Fe(CN)5NO]3+ (b)[Fe(H2O)4NO]2+NO+
FeSO4 is a very good absorber for NO. The number of unpaired electrons in the new compound formed by this process is
Which statement is wrong for NO ?
Which of the following oxides of nitrogen is solid?
Which of the following halides of nitrogen is stable?
Among the following, the element that does not show allotropy is
The element which forms oxides in all oxidation states +I to + V is :
PCl5 on hydrolysis gives
Phosphorus is obtained by
White phosphorus reacts with NaOH to give PH3 and NaH2PO2. This reaction involves
On boiling phosphorus with KOH solution, product formed is
The reaction of P4 with X leads selectively to P4O6. The X is: