Related InterviewSolutions

• Hydrogen molecule differs from chlorine molecule in the following respect `:`A. hydrogen molecule is non-polar but chloride molecule is polar.B. hydrogen molecule is polar while chlorine molecule is non-polar.C. hydrogen molecule can form intermolecular hydrogen bonds but chloride molecule does not.D. hydrogen molecule cannot participates in co-ordinate bond formation but chlorine molecule can.
• `H_(2)O_(2)` restores the colour of old lead paintings, blackened by the action of `H_(2)S` gas by :A. converting `PbO_(2)` to PbB. by oxidising PbS to `PbSO_(4)`C. converting `PbCO_(3)` to PbD. oxidising `PbSO_(3)` to `PbSO_(4)`
• Temporaty hardness of water is caused due to the presence ofA. `CaSO_(4)`B. `CaCl_(2)`C. `CaCO_(3)`D. `Ca(HCO_(3))_(2)`
• The smog is essentially caused by the presence of `:`A. `O_(2)` and `N_(2)`B. `O_(3)` and `N_(2)`C. Oxides of sulphur and nitrogenD. `O_(2)` and `O_(3)`
• `H_(2)O_(2)` is :A. an oxidising agentB. both oxidising and reducing agentC. reducing agentD. none of the above
• `H_(2)O_(2)` is always stored in black bottles becauseA. it is highly unstableB. its enthalpy of decomposition is highC. it undergoes auto-oxidation on prolonged standing in lightD. none of the above
• In acidic medium ,` H_(2)O_(2)` acts as a reducing agent in its reaction with `:`A. `FeSO_(4)`B. `KMnO_(4)`C. `K_(2)MnO_(4)`D. `K_(4)[Fe(CN)_(6)]`
• Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases `H_(2)O_(2)` acts as a reducing agent in acid medium ?A. `MnO_(4)^(-)`B. `SO_(3)^(2-)`C. `KI`D. `Cr_(2)O_(7)^(2-)`
• Ionic hydrides is/are usually :A. good electrical conductors when solidB. easily reducedC. good reducing agentsD. liquid at room temperature
• Ionic hydrides are formed by :A. transition metalsB. elements of very high electropositivityC. elements of very low electropositivityD. metalloids