25mL of a solution containing HCl and `H_2SO_4` required 10 mL of a 1 N NaOH solution for neutralization.20 mL of the same acid mixture on being treat

Monjur Alahi

25mL of a solution containing HCl and `H_2SO_4` required 10 mL of a 1 N NaOH solution for neutralization.20 mL of the same acid mixture on being treated with an excess of `AgNO_3` gives 0.1435 g of AgCl.The normality of the HCl and the normality of the `H_2SO_4` are respectively.
A. 0.40 N and 0.05 N
B. 0.05 N and 0.35 N
C. 0.50 N and 0.25 N
D. 0.40 N and 0.5 N


0 like 0 dislike
1 views
Share with your friends

1 Answers

Salim Ahmed Kawsar

Call

Correct Answer - B
Let normality of HCl is `N_1` and `H_2SO_4` is `N_2`.
`:.` Mili eq. of HCl + Mili eq. of `H_2SO_4` = Mili eq. of NaOH
`25xxN_1+25xxN_2=10xx1`..(1)
`N_1+N_2=0.4`…(1)
BY POAC
Moles of `Cl^(-)`=moles of AgCl
`(20xxN_1)/1000=0.1435/143.5=10^(-3)`
`N_1=0.05 N`
`N_2=0.35 N`

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
The enthalpy of neutralization of oxitic acid by strong acid is `25.4 kcal mol^(-1)`. The enthalpy of neutralization of strong acid and strong base is

Correct Answer - B Enthalpy of dissociation of oxalic acid `=` Heat of neutralization of a strong acid with a strong base `-` Heat of neutralization of oxalic acid with a...

2 Answers 1 views
A and B are two salts. A reacts both with dil `H_2SO_4` and conc. `H_2SO_4` to give reddish brown vapours. However, B reacts only with conc. `H_2SO_4`

Correct Answer - C `NaNO_2` gives `NO_2` (brown vapours) both with dil. as well as conc. `H_2SO_4`. However NaBr gives `Br_2` (brown vapours) only with conc. `H_2SO_4`. This is because halides...

2 Answers 1 views
Assertion (A) : When KBr is heated with conc. `H_2SO_4`, HBr is displaced. Reason (R) :HBr is a weaker acid than conc. `H_2SO_4`.

Correct Answer - D Assertion. When KBr is heated with conc. `H_2SO_4, Br_2` is produced. Reason. Conc. `H_2SO_4` oxidised HBr produced to `Br_2`.

2 Answers 1 views
Assertion (A) : When NaCl(s) is heated with conc. `H_2SO_4, Cl_2` is produced. Reason (R) :Conc. `H_2SO_4` oxidises the HCl produced to `Cl_2`.

Correct Answer - B When NaCl(s) is heated with conc. `H_2SO_4`, HCl is produced. Conc. `H_2SO_4` cannot oxidise HCl to `Cl_2`.

2 Answers 1 views
A weak acid of dissociation constant `10^(-5)` is being titrated with aqueous NaOH solution . The pH at the point of one third of neutralization of th

Correct Answer - B On partial neutralization of weak acid, salt is formed. Hence it becomes buffer `:. pH =pK_(a)+log. (|"Salt"|)/(|"Acid"|).` `1//3` rd neutralization of the acid means out of 1...

2 Answers 1 views
Statement-I : The enthalpy of neutralization of the reaction between `HCl` and `NaOH` is `-13.7` kCal/mol. If the enthalpy of neutralization of oxalic

Correct Answer - D `H^(+)+OH^(-) =13.7` `2H^(+)+2OH^(-) rarr H_(2)O=27.4` But energy released `=25.4` `:. H_(1)C_(2)O_(4) rarr 2H^(+) +C_(2)O_(4)^(-2)" "DeltaH=2" kCal/mol."`

2 Answers 1 views
300 gm, `30%`(w/w) NaOH solution is mixed with 500 gm `40%`(w/w) NaOH solution. What is `%` (w/v) NaOH if density of final solution is 2 gm/mL?

Correct Answer - A % (w/v) volume of NaOH`=((300xx0.3+500xx0.4)/(800))/2xx100=72.5`

2 Answers 1 views
Assertion(A) : Heat of neutralisation of `HCl` and `NaOH` is same as that of `H_(2)SO_(4)` with `NaOH`. Reason(R ) : `HCl`, `H_(2)SO_(4)` and `NaOH` a

Correct Answer - A Heat of neutralisation of strong acid with strong base is contant `(-137 Kcal//mol^(-1))`

2 Answers 1 views
Reduction of `117.5 g BCl_(3)` by `H_(2)` in silent electric discharge produces `HCl`, which required `500 mL` of `xM NaOH` for neutralization. Report

`2BCl_(3)+6H_(2)underset("Electric discharge")overset("Silent")toB_(2)H_(6)+6HCl` one mole , `3` mole `HCl + NaOHto NaCl+H_(2)O` `3` moles `3` moles

2 Answers 1 views
The enthalpy of neutralization of oxalic acid by strong acid is `- 25.4 kcal mol^(-1)`. The enthalpy of neutralization of strong acid and strong base

Correct Answer - B Oxalic acid is dibasic acid hence expected heat of neutralization will be `(2xx-13.7kcal)`. The dissociation energy of oxalic acid `2xx13.7-25.4` `=2" kcal "mol^(-1)`

2 Answers 1 views
X