19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
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?
In NO ion, the number of bond pairs and lone pair of electrons on nitrogen atom are
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
A green coloured solution of a salt changes its colour to light pink on passing ozone through it. Which of the following species represent pink and green colour respectively ?
Assertion: The electronic structure of O3 is Reason: The following structure is not allowed because the octet around O cannot be expanded.
Assertion: O3 has a fishy smell. Reason: It absorbs red part of the visible light.
Assertion: Although PF5, PCl5 and PBr5 are known, the pentahalides of nitrogen have not been observed. Reason: Phosphorous has a lower electronegativity than nitrogen.
Assertion: HNO3 is a stronger acid than HNO2. Reason: In HNO3 there are two nitrogen to oxygen bonds whereas in HNO2 there is only one.
The shape of XeO2F2 molecule is:
The oxidation state of xenon atom in XeF4, HXeO and Na4XeO6 are respectively:
When F2 reacts with hot and conc. alkali, then following will be obtained: (i) OF2 (ii) O2 (iii) H2O (iv) NaF
Dry Cl2 reacts with dry SO2 to form: