MolSynapse / Question bank / p-Block Elements: Groups 15 and 16 / Oxygen, ozone and oxides

Oxygen, ozone and oxides

36 questions on Oxygen, ozone and oxides from the p-Block Elements: Groups 15 and 16 chapter: 9 NEET level, 16 JEE Main, 11 JEE Advanced. Each one opens with its answer and solution.

Practice this topic All p-Block Elements: Groups 15 and 16 topics

When potassium chlorate is heated to obtain dioxygen in the laboratory, a little MnO2 is added. Its role is to NEET level
Which one of the following oxides is amphoteric? NEET level
Which of the following oxides of nitrogen is neutral? NEET level
Dioxygen is paramagnetic. According to molecular orbital theory this is because NEET level
Ozone oxidises black lead sulphide to a white compound. The compound formed is NEET level
The decomposition 2O3 -> 3O2 is exothermic. It follows that ozone is NEET level
Ozonised oxygen is prepared in the laboratory by passing a silent electric discharge through cold, dry dioxygen. A silent discharge rather than a spark is used ... JEE Main level
Ozone is passed into excess neutral potassium iodide solution: O3 + 2I- + H2O -> I2 + O2 + 2OH-. The iodine is titrated with sodium thiosulphate, I2 + 2S2O3^2- ... JEE Main level
Mercury loses its meniscus and sticks to glass (tailing) on exposure to ozone because JEE Main level
Assertion: Ozone is thermodynamically unstable with respect to dioxygen. Reason: The conversion 2O3 -> 3O2 is exothermic and is accompanied by an increase in en... JEE Main level
Match the oxide in Column I with its nature in Column II. Column I: (P) CaO (Q) ZnO (R) CO (S) Mn2O7. Column II: (1) acidic (2) neutral (3) amphoteric (4) basic... JEE Main level
How many of the following oxides are acidic: CO2, Al2O3, N2O5, CaO, NO, Cl2O7? JEE Main level
Nitric oxide from supersonic aircraft depletes stratospheric ozone through the steps NO + O3 -> NO2 + O2 and NO2 + O -> NO + O2. The net reaction and the role o... JEE Main level
Which one of the following does NOT liberate dioxygen on strong heating? JEE Main level
Dioxygen is manufactured industrially mainly by fractional distillation of liquid air. In this process JEE Main level
Consider the species O2^+, O2, O2^- and O2^2-. Select the correct statement(s). JEE Advanced level
Select the correct statement(s) about ozone. JEE Advanced level
A 2.24 L sample (at STP) of ozonised oxygen (a mixture of O2 and O3 only) is passed through excess KI solution. The iodine liberated requires 38.4 mL of 0.500 M... JEE Advanced level
Which of the following oxides is neutral? NEET level
The ozone molecule is NEET level
When ozone is passed through an aqueous solution of potassium iodide, the substance liberated that turns starch solution blue is NEET level
Potassium chlorate (KClO3, 122.5 g/mol) is heated with MnO2 as catalyst: 2KClO3 -> 2KCl + 3O2. The volume of oxygen at STP (22.4 L/mol) from 12.25 g of KClO3 is JEE Main level
Which statement about the conversion 3O2 -> 2O3 is correct? JEE Main level
Lead sulphide is oxidised by ozone to lead sulphate. In PbS + O3 -> PbSO4 + O2, the number of moles of O3 needed per mole of PbS is JEE Main level
Ozone is bubbled through a neutral aqueous solution of potassium iodide. The products and the effect on litmus are JEE Main level
In potassium superoxide, KO2, the oxidation state of oxygen and its magnetic behaviour are JEE Main level
Sodium peroxide (7.8 g, 78 g/mol) reacts with excess water: 2Na2O2 + 2H2O -> 4NaOH + O2. The volume of O2 at STP (22.4 L/mol) is JEE Main level
Which of the following oxides react with aqueous NaOH? JEE Main level
An ozone-containing gas sample is passed into excess acidified KI. The iodine liberated needed 28.40 mL of 0.1050 M sodium thiosulphate. Use O3 + 2I- + H2O -> I... JEE Advanced level
Select the correct statement(s) about ozone. JEE Advanced level
Select the correct statement(s) about oxides. JEE Advanced level
One litre of ozonised oxygen is heated so that all ozone decomposes (2O3 -> 3O2) and the volume, measured at the same temperature and pressure, becomes 1.2 L. T... JEE Advanced level
In the Lewis structure of ozone with one double bond and one single bond (formal charges +1 on the central atom and -1 on one terminal atom), the total number o... JEE Advanced level
Consider: (I) NO and CO are neutral oxides. (II) Pb3O4 is a mixed oxide of PbO and PbO2. (III) Na2O2 gives H2O2 with cold dilute acid. (IV) BaO2 contains the su... JEE Advanced level
A mixture of 0.20 mol KClO3 and 0.20 mol KMnO4 is heated strongly until both decompose completely (2KClO3 -> 2KCl + 3O2 and 2KMnO4 -> K2MnO4 + MnO2 + O2). The v... JEE Advanced level
Select the correct statement(s) about oxygen and its compounds. JEE Advanced level