19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
For which one of the following minerals, the composition given is incorrect? (Kerala CEE 2007)
The reaction which is not involved in thermite process: (a) 3Mn O 8Al 9Mn 4Al O + ¾¾® + (b) Cr O 2Al 2Cr Al O + ¾¾® + (c) 2Fe Al O Fe O 2Al + ¾¾® + (d) B O 2Al 2B Al O + ¾¾® +
PCl₅ on hydrolysis gives
PH₃ and NH₃ on separate reaction with bleaching powder produce respectively
Solid PCl₅ exists as
White phosphorus reacts with NaOH to give PH₃ and NaH₂PO₂. This reaction involves
The reaction of P₄ with X leads selectively to P₄O₆. The X is:
On boiling phosphorus with KOH solution, product formed is
White phosphorus reacts with concentrated HNO₃ to give
The percentage of p-character in the orbitals forming P–P bonds in P₄ is:
Syrupy H₃PO₄ is viscous due to
Which of the following statements is correct regarding the behaviour of white phosphorus?
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:
Which of the following statements is true for the H₃PO₃ molecule?
Ammonia gas can be dried by
Ammonia, on reaction with excess of chlorine, gives :
Mg (NH₄)PO₄ and Na(NH₄) HPO₄ are heated separately. Which of the following statements is/are completely incorrect regarding the product obtained in the above process? (I) Same gas is evolved (II) Same type of phosphat…
A solution of sodium in liquid ammonia is blue due to the presence of
Small quantities of very pure N₂ is obtained by carefully warming
Which of the following compounds does not give N₂ on heating?
The reaction between urea and nitrous acid produces
In NO ion, the number of bond pairs and lone pair of electrons on nitrogen atom are
Which of the following gases is the least reactive?
Which of the following forms strong p - p bonding
An aqueous solution of ammonia consists of