MEDIUM
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A 0.1 N solution of Na2CO3 is titrated with 0.1 N HCl solution. The best indicator to be used is

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Important Questions on Transfer

HARD
The reagent(s) that can selectively precipitate S2- from a mixture of S2- and SO42- in aqueous solution is (are)
EASY
Incorrect statement for the use of indicator in acid-base titration is:
EASY
100 mL of 0.1 M HCl is taken in a beaker and to it 100 mL 0.1 M NaOH of is added in steps of 2 mL and the pH is continuously measured. Which of the following graphs correctly depicts the change in pH ?
EASY
On heating, lead (ll) nitrate gives a brown gas (A). The gas (A) on cooling changes to a colourless solid/liquid (B). (B) on heating with NO changes to ablue solid (C). The oxidation number of nitrogen in solid (C) is:
MEDIUM
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:
MEDIUM
HgCl2 and I2 both when dissolved in water containing I- ions the pair of species formed is:
HARD
In an acid-base titration, 0.1 M HCl solution was added to the NaOH solution of unknown strength. Which of the following correctly shown the change of pH of the titration mixture in this experiment?
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EASY
In the detection of II group acid radical, the salt containing chloride is treated with concentrated sulphuric acid, the colourless gas is liberated. The name of the gas is
HARD
In base vs. Acid titration, at the end point methyl orange is present as
HARD
A compound 'X' is a weak acid and it exhibits colour change at pH close to the equivalence point during neutralization of NaOH with CH3COOH. Compound 'X' exists in ionized form in basic medium. The compound 'X' is
EASY
Reaction of an inorganic sulphite X with dilute H2SO4 generated compound Y. Reaction of Y with NaOH gives X. Further, the reaction of X with Y and water affords compound Z, Y and X, respectively, are :
HARD
In a complexometric titration of metal ion with ligand M (Metal ion)+L(Ligand)C (Complex) 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:
MEDIUM
Sodium nitroprusside, when added to an alkaline solution of sulphide ions, produce a
MEDIUM
The sodium salt of an organic acid X produces effervescence with concentrated H2SO4. X reacts with the acidified aqueous CaCl2 solution to give a white precipitate which decolourises acidic solution of KMnO4. X is
HARD
When a mixture of NaCl,K2Cr2O7 and concentrated H2SO4 is heated in a dry test tube, a red vapour X is evolved. This vapour X turns an aqueous solution of NaOH yellow due to the formation of Y. X and Y, respectively, are:
HARD
A white precipitate was formed when BaCl2 was added to water extract of an inorganic salt. Further, a gas 'X' with characteristic odour was released when the formed white precipitate was dissolved in dilute HCI. The anion present in the inorganic salt is:
MEDIUM

Match List I with List II.

  List-I
(Anion)
  List-II
(gas evolved on reaction with dil. H2SO4)
(A) CO32- (I)

Colourless gas which turns lead acetate paper black.

(B) S2- (II)

Colourless gas which turns acidified potassium dichromate solution green.

(C) SO32- (III) Brown fumes which turns acidified KI solution containing starch blue.
(D) NO2- (IV) Colourless gas evolved with brisk effervescence, which turns lime water milky.

Choose the correct answer from the options given below

HARD
The Plot of pH-metric titration of weak base NH4OH vs strong acid HCl looks like
MEDIUM
An alkali is titrated against acid with methyl orange as an indicator, which of the following is a correct combination?
MEDIUM
50mL of 0.5M oxalic acid is needed to neutralize 25mL of sodium hydroxide solution. What is the amount of NaOH in 50mL of the given sodium hydroxide solution?