19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
Which of the following rare gas is the abundant in air? (JIPMER 2019)
Identify the incorrect statement related to PCl5 from the following: (NEET 2019)
A compound ‘X’ upon reaction with H2O produced a colourless gas ‘Y’ with rotten fish smell. Gas ‘Y’ is absorbed in a solution of CuSO4 to give Cu3P2 as one of the products. Predict the compound ‘X’ (NEET (Odisha)2019)
Which of the following oxoacids of phosphorus has strongest reducing property? (NEET (Odisha)2019)
In which of the following, oxidation state of phosphorus is +3? (JIPMER 2019)
Urea reacts with water to form A which will decomposes to form B. B when passed through Cu2+ (aq), deep blue color solution C is formed. What is the formula of C from the following. (NEET 2020)
In which on of the following arrangements the given sequence is not strictly according to the properties Indicated against it? (NEET 2021)
The best reducing agent among the following is
Which of the following compounds does not form ammonia on heating?
N2 is passed through overheated CaC2. Which of the following options is correct for the product formed? (I) State of hybridization of C is sp. (II) Urea is an intermediate formed during hydrolysis of the above product…
In the cationic parts of solid N2O5 and solid N2O4, the bond order of N–O are, respectively,
Ammonia, on reaction with excess of chlorine, gives :
A solution of sodium in liquid ammonia is blue due to the presence of
A gas ‘X’ is used in filling balloons for meteorological observations. It is also used in gas-cooled nuclear reactors. Here, the gas X is (AIIMS 2018)
Xenon hexafluoride reacts with silica to form a xenon compound X. The oxidation state of xenon in X is (JIPMER 2018)
In the cyclo-S8 molecule of rhombic sulphur, all the S—S bond lengths and all the S—S—S bond angles are respectively (approximate values)
Which of the following is/are correct?
O3 cannot oxidise:
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 ?
In the presence of water, sulphur is oxidized by ozone to give
The gases absorbed by alkaline pyrogallol and oil of cinnamon are respectively
At room temperature, O3 is absorbed by
Ozone is an extremely powerful oxidizing agent. It is
Which of the following statements is correct?
Ozonized oxygen is a mixture of