Related InterviewSolutions

• What volume at NTP of gaseous ammonia will be required to be passed into `30 cm^(3)` of 1 N `H_(2)SO_(4)` solution to bring down the acid strength of the latter of 0.2 N ?
• `50 mL` of `0.1 M` solution of a salt reacted with `25 mL` of `0.1 M` solution of sodium sulphite. The half reaction for the oxidation of sulphite ion is: `SO_(3)^(2-)(aq)+H_(2)O(l) rarr (aq)+2H^(+)(aq)+2e^(-)` If the oxidation number of metal in the salt was `3`, what would be the new oxidation number of metal:
• Volume `V_(1)mL` of 0.1 M `K_(2)Cr_(2)O_(7)` is needed for complete oxidation of 0.678g `N_(2)H_(4)` in acidic medium. The volume of 0.3M `KMnO_(4)` needed for same oxidation in acidic medium will be :A. `(2)/(5)V_(1)`B. `(5)/(2)V_(1)`C. 113`V_(1)`D. can not be determined
• An element `A` in a compound `ABD` has oxidation number `A^(n-)`. It is oxidised by `Cr_(2)O_(7)^(2-)` in acid medium. In the experiment `1.68xx10^(-3)` moles of `K_(2)Cr_(2)O_(7)` were used for `3.26xx10^(-3)` moles of `ABD`. The new oxidation number of `A` after oxidation is:A. 3B. 3-nC. n-3D. `+n`
• A certain weioght of pure `CaCO_(3)` is made to react completely with 200mL of a HCl solution to given 227mL of `CO_(2)` gas at STP. The notmality of the HCl` solution is :
• 1.2g of carbon is burnt completely in oxygen (limted supply) to produce CO and `CO_(2)` . This mixture of gases is treated with solid `I_(2)O_(5)` (to know the amount of CO produced). The librated iodine required 120 ml of 0.1m hypo solution for complete titration. The percentage carbon converted into CO is :A. 0.6B. 1C. 0.5D. 0.3
• 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. `Cr_(2)O_(7)^(2-)`C. `SO_(3)^(2-)`D. Kl
• For standardizing NaOH solution, which of the following is used as a primary standard ?A. Sodium tetraborateB. Ferrous Ammonium SulfateC. Oxalic acidD. dil. HCl
• In the reaction `H_(2)O_(2)^(18)+O_(3) to ` water + oxygen, radioactivity will be shown by which of the product ?A. waterB. oxygenC. both (1) & (2)D. None of these
• The volume of `0.1 N` dibasic acid sufficient to neutralize 1g of a base that furnishes `0.04` mole of `OH^-` in aqueous solution is :A. 400 mLB. 600 mLC. 200 mLD. 80 mL