A mixture of CuS (molecular weight = `M_(1)`) and `Cu_(2)S` (molecular weight `=M_(2)`) is oxidised by `KMnO_(4)` (molecular weight `=M_(3)`) in acidic medium, where the product obtained are `Cu^(2+),Mn^(2+)` and `SO_(2)`. Find the equivalent weight of CuS, `Cu_(2)S` and `KMnO_(4)` respectively.
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What will be the % loss in mass, if an equimolar mixture of `NaHCO_(3)` and `Na_(2)CO_(3)` is heated till constant weight?
`2NaHCO_(3)overset(Delta)rarrNa_(2)CO_(3)+H_(2)Ouparrow(g)+CO_(2)uparrow(g) n_(CO_(2))"produce"=(n_(NaHCO_(3)))/(2)` mole a `(W_(CO_(2)))/(44)=(a)/(2)` `Na_(2)CO_(3)(Delta)rarrx W_(CO_(2))"produce"=22a` M.Wt. `NaHCO_(3)=84, M.Wt. Na_(2)CO_(3)=106 n_(H_(2)O)=(n_("NaHCO_(3)))/(2)` `rArrH_(2)O` remove as vapour during heating along with `CO_(2)` give mass loss Total mass loss =22a+9a=31a along with...
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12.8 gm mixture of CO and `CO_(2)` exerts a pressure of 6atm at 300K in 1.642 litre container. If all the oxygen of this mixture is used to form `H_(2
`n=(PV)/(RT)=(6xx0.821xx2)/(0.0821xx300)=0.4` mole `n_(CO)+n_(CO_(2))=0.4` ` x xx 28+(0.4-x)xx44=12.8` (total mass of mixture) Solve x=0.3 0.3 mole CO and 0.1 mole `CO_(2)` mole of O-atom `=0.3+0.2=0.5` mole of `H_(2)O` formed =0.5 mass of...
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In dilute aqueous `H_(2)SO_(4)` the complete diaquadioxalatoferrate (II) is oxidised by `MnO_(4)^(-)`. For thi reaction, the ratio of the rate of chan
Correct Answer - `(8)`
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A decapeptide (Molecular weight 796) on complete hydrolysis gives glycine (Molecular weight 75), alanine and phenylanine. Glycine contributes 47.0 % t
Correct Answer - `6`
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A sample of Uranium is a mixture of two isotopes `._(92)^(234)U` and `._(92)^(238)U` present in the ratio `10%` and `90%` by weight. The half lives of
Correct Answer - `[16.67% and 83.33 %]`
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A solution contains a mixture of two isotopes A (`half-life=10days`) and B (`half-life=5days`). Total activity of the mixture is `10^10` disintegratio
Correct Answer - `[(a) 0.73xx10^(10) dps 0.27xx10^(10) dps, (b) 5.4]`
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Determine the equivalent weight of the following oxidising and reducing agents : (a) `KMnO_(4)` (reacting in acidic medium `MnO_(4)^(-)rarrMn^(2+)`) (
Correct Answer - (a) 31.6 ; (b) 52.67.
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How many compound(s) or iron (s) can be oxidised by `H_(2)O_(2)` among the following (i) `AsO_(3)^(2)` (ii) `SO_(4)^(2-)` (iii) `Fe_(2) (SO_(4))_(3)`
Correct Answer - 4(I, iv, v and vi)
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The mean weight of 25 students of a class is 52 kg. if the mean weight of the first 13 student of the class is 48 kg and that of the last 13 students
Correct Answer - 39 kg
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The molecular mass of an organic compound is 78 g mol^(-1). Its empirical formula is CH. The molecular formula is ………….
Option : (C) C6H6
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