19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
The bond order in the NO molecule is
A solution of sodium in liquid ammonia is blue due to the presence of
Ammonia, on reaction with excess of chlorine, gives :
Ammonia gas can be dried by
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…
Which of the following fertilizers on repeated application would increase the acidity of the soil?
The reaction between urea and nitrous acid produces
Which of the following compounds does not give N2 on heating?
Small quantities of very pure N2 is obtained by carefully warming
Which of the following reactions is used in the preparation of N2?
N2 is commercially prepared by
Which of the following forms strong p - p bonding
Which of the following gases is the least reactive?
An aqueous solution of ammonia consists of
Which of the following oxides is the most acidic?
Among the following compounds of nitrogen and hydrogen, the most acidic compound is
Which of the following is the increasing order of enthalpy of vaporization?
Which one of the following compounds is most explosive?
The tendency of nitrogen halides to act as Lewis bases decreases in the order
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 :
Zinc sulphate contains 22.65% Zn and 43.9% H2O. If the law of constant proportions is true, then the mass of zinc required to give 40g crystals will be :
Which one of the following data has only four significant figures? (Kerala CEE 2014)
O Thus, 1.0 g Mg reactis with 0.67 . g O But only 0.56g O is available which less than 0.67 g is. Thus, O . is the limiting reagent. MOLE & EQUIVALENT CONCEPT Further, 16g O reacts with 24g of Mg. 0.56g O will re…