Related InterviewSolutions

• In electrolysis of `NaCl` when `Pt` electrode is taken `H_(2)` is liberated at cathode while `Hg` cathode it forms sodium amalgam becauseA. Hg is more inert than PtB. more voltage is required to reduce `H^(+)` at Hg than at PtC. Na is dissolved in Hg while it does not dissove in PtD. concentration of `H^(+)` ions is larger when Pt electrode is taken
• Which among the following is kinetically inert towards water?A. NaB. BeC. CaD. K
• Which ions are produced when anhydrous KF is mixed with conc. HF?A. `K^(+),H^(+),F^(-)`B. `{KF^(+)(HF^(-))}`C. `KH^(+),F^(-)`D. `K^(+),HF_(2)^(-)`
• Fill up the blanks with appropriate choice. Lithium and magnesium react slowly with water. their hydroxides are_____soluble in water. Carbonates of Li and Mg____easily on heating. Both LiCl and `MgCl_(2)` are_____in ethanol and are_______.they crystallise from their aqueous solutions as_____.A. More, do not decompose, soluble, hygroscopic, hydratesB. less, decompose, soluble, deliquescent, hydratesC. freely, sublime, insoluble, deliquescent, anhydrousD. freely, docompose, soluble, hygroscopic, crystals
• The oxidation states of the most electronegative elements in the products of the reaction between `BaO_(2)` and `H_(2)SO_(4)` areA. 0 and -1B. `-1` and -2C. `-2` and 0D. `-2` and +1
• An excess of `KO_(2)` is placed in a closed container of `CO_(2)`(g). After reaction is completed. Will the gas pressure be same, greater or less than initial value. Example.
• Write balanced equations for reactions between a. `Na_(2)O_(2)` and water b. `KO_(2)` and water c. `Na_(2)O` and `CO_(2)`
• Among `KO_(2),ALO_(2)^(Θ)`,`BaO_(2)` and `NO_(2)^(+)`,unpaired electrons is present in .A. `NO_(2)^(+) and BaO_(2)`B. `KO_(2) and AlO_(2)^(-)`C. `KO_(2)` onlyD. `BaO_(2)` only
• The stability off `K_(2)O,K_(2)O_(2) and KO_(2)` is in order `K_(2)O lt K_(2)O_(2) lt KO_(2)`. This increasing stability as the size of metal ion increases is due to stabilisation ofA. larger cation by smaller anions through lattice energy effectsB. larger cation by larger anions through lattice energy effectsC. smaller cations by smaller anions through melting pointD. smaller cations by larger anions through melting point.
• A metal `M` readily forms its sulphate `MSO_(4)` which is water soluble. It forms its oxide `MO` which becomes inert on heating. It forms its insoluble hydroxide `M(OH)_(2)` which is soluble in `NaOH` solution. Then `M` isA. `Be`B. BaC. CaD. Mg