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An alkali is titrated against an acid with methyl orange as indicator, which of the following is a correct combination?

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Important Questions on Transfer

EASY

Chemistry>Change>Transfer>Titration

While titration dilute

HCl

solution with aqueous

NaOH

, which of the following will not be required ?

MEDIUM

Chemistry>Change>Transfer>Titration

50 mL

0 .5 M

oxalic acid is needed to neutralize

25 mL

of sodium hydroxide solution. What is the amount of

NaOH

50 mL

of the given sodium hydroxide solution?

MEDIUM

Chemistry>Change>Transfer>Titration

The strength of an aqueous

N a O H

solution is most accurately determined by titrating: (Note: consider that an appropriate indicator is used)

MEDIUM

Chemistry>Change>Transfer>Titration

2 {KMnO}_{4} + 3 H_{2} {SO}_{4} + 5 H_{2} O_{2} \to K_{2} {SO}_{4} + 2 {MnSO}_{4} + 8 H_{2} O + 5 O_{2}

Find the nonnality of

H_{2} O_{2}

solution, if

20 mL

of it is required to react completely with

16 mL

0.02 {MKMnO}_{4}

solution. ( Molar mass of

{KMnO}_{4} = 158 g {mol}^{- 1}

)

HARD

Chemistry>Change>Transfer>Titration

A compound '

X

' is a weak acid and it exhibits colour change at

pH

close to the equivalence point during neutralization of

NaOH

with

{CH}_{3} COOH

. Compound '

X

' exists in ionized form in basic medium. The compound '

X

' is

MEDIUM

Chemistry>Change>Transfer>Titration

In the titration of

I_{2} (aq)

S_{2} O_{3}^{2 -}

(aq)

using the starch indicator, the end point is indicated by:

MEDIUM

Chemistry>Change>Transfer>Titration

For standardizing

NaOH

solution, which of the following is used as a primary standard?

EASY

Chemistry>Change>Transfer>Titration

In the given chemical reaction, colors of the ${Fe}^{2 +}$ and ${Fe}^{3 +}$ ions, are respectively :

$5 {Fe}^{2 +} + {MnO}_{4}^{-} + 8 H^{+} \to {Mn}^{2 +} + 4 H_{2} O + 5 {Fe}^{3 +}$

HARD

Chemistry>Change>Transfer>Titration

The Plot of

pH

-metric titration of weak base

{NH}_{4} OH

vs strong acid

HCl

looks like

EASY

Chemistry>Change>Transfer>Titration

Incorrect statement for the use of indicator in acid-base titration is:

HARD

Chemistry>Change>Transfer>Titration

In a titration experiment, $10 mL$ of an ${FeCl}_{2}$ solution consumed $25 mL$ of a standard $K_{2} {Cr}_{2} O_{7}$ solution to reach the equivalent point. The standard $K_{2} {Cr}_{2} O_{7}$ solution is prepared by dissolving $1.225 g$ of $K_{2} {Cr}_{2} O_{7}$ in $250 mL$ water. The concentration of the ${FeCl}_{2}$ solution is closest to

[Given : molecular weight of $K_{2} {Cr}_{2} O_{7} = 294 g {mol}^{- 1}$ ]

MEDIUM

Chemistry>Change>Transfer>Titration

Given below are two statements:
Statement I : In the titration between strong acid and weak base methyl orange is suitable as an indicator.
Statement II : For titration of acetic acid with $\mathrm{NaOH}$ phenolphthalein is not a suitable indicator.
In the light of the above statements, choose the most appropriate answer from the options given below:

HARD

Chemistry>Change>Transfer>Titration

0.4 g

mixture of

NaOH, {Na}_{2} {CO}_{3}

and some inert impurities was first titrated with

\frac{N}{10} HCl

using phenolphthalein as an indicator,

17.5 mL

HCl

was required at the end point. After this methyl orange was added and titrated.

1.5 mL

of same

HCl

was required for the next end point. The weight percentage of

{Na}_{2} {CO}_{3}

in the mixture is (Rounded-off to the nearest integer)

MEDIUM

Chemistry>Change>Transfer>Titration

An alkali is titrated against acid with methyl orange as an indicator, which of the following is a correct combination?

MEDIUM

Chemistry>Change>Transfer>Titration

In Tollen's test for aldehyde, the overall number of electron(s) transferred to the Tollen's reagent formula

{[Ag {({NH}_{3})}_{2}]}^{+}

per aldehyde group to form silver mirror is ___.(Round off to the Nearest integer)

HARD

Chemistry>Change>Transfer>Titration

For kinetic study of the reaction of iodide ion with $H_{2} O_{2}$ at room temperature :

(A) Always use freshly prepared starch solution.

(B) Always keep the concentration of sodium thiosulphate solution less than that of $KI$ solution.

(D) Record the time immediately before the appearance of blue colour.

(E) Always keep the concentration of sodium thiosulphate solution more than that of $KI$ solution.

Choose the correct answer from the options given below

HARD

Chemistry>Change>Transfer>Titration

2.0 g

sample containing

{MnO}_{2}

is treated with

HCl

liberating

{Cl}_{2}

. The

{Cl}_{2}

gas is passed into a solution of

KI

and

60.0 mL

0.1 {MNaS}_{2} O_{3}

is required to titrate the liberated iodine. The percentage of

{MnO}_{2}

in the sample is____. Nearest integer)
[Atomic masses (in

u

)

Mn = 55; Cl = 35.5 : O = 16, I = 127, Na = 23, K = 39, S = 32

]

HARD

Chemistry>Change>Transfer>Titration

To measure the quantity of

{MnCl}_{2}

dissolved in an aqueous solution, it was completely converted to

{KMnO}_{4}

using the reaction,

{MnCl}_{2} + K_{2} S_{2} O_{8} + H_{2} O \to {KMnO}_{4} + H_{2} {SO}_{4} + HCl

(equation not balanced). Few drops of concentrated

HCl

were added to this solution and gently warmed. Further, oxalic acid

(225 mg)

) was added in portions till the colour of the permanganate ion disappeared. What is the quantity of

{MnCl}_{2}

(in mg) present in the initial solution? (Atomic weights in

g {mol}^{- 1} : Mn = 55, Cl = 35 .5

)

HARD

Chemistry>Change>Transfer>Titration

In base vs. Acid titration, at the end point methyl orange is present as

HARD

Chemistry>Change>Transfer>Titration

In a complexometric titration of metal ion with ligand

M (M e t a l i o n) + L (L i g a n d) \to C (C o m p l e x)

end point is estimated spectrophotometrically (through light absorption). If 'M' and 'C' do not absorb light and only 'L' absorbs then the titration plot between absorbed light

(A)

versus volume of ligand 'L'

(V)

would look like:

Base	Acid	End point
Strong	Strong	Pink to colourless

Base	Acid	End point
Weak	Strong	Colourless to pink

Base	Acid	End point
Strong	Strong	Pinkish red to yellow

Base	Acid	End point
Weak	Strong	Yellow to pinkish red

An alkali is titrated against an acid with methyl orange as indicator, which of the following is a correct combination?

Important Questions on Transfer

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