Practical Organic Chemistry

Given below are two statements:
Statement I : Methyl orange is a weak acid.
Statement II : The benzenoid form of methyl orange is more intense/deeply coloured than the quinonoid form.
In the light of the above statement, choose the most app...

A compound '\(\mathrm{X}\)' when treated with phthalic anhydride in presence of concentrated \(\mathrm{H}_{2} \mathrm{SO}_{4}\) yields '\(\mathrm{Y}\)'. '\(\mathrm{Y}\)' is used as an acid/base indicator. '\(\mathrm{X}\)' and '$$\mathrm{Y}$...

Match List I with List II

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...

In Dumas method for the estimation of $\mathrm{N}_{2}$, the sample is heated with copper oxide and the gas evolved is passed over :

Compound that will give positive Lassaigne's test for both nitrogen and halogen is :

Given below are two statements :
Statement I : Sulphanilic acid gives esterification test for carboxyl group.
Statement II : Sulphanilic acid gives red colour in Lassigne's test for extra element detection.
In the light of the above stateme...

\(\mathrm{KMnO}_{4}\) is titrated with ferrous ammonium sulphate hexahydrate in presence of dilute \(\mathrm{H}_{2} \mathrm{SO}_{4}\). Number of water molecules produced for 2 molecules of \(\mathrm{KMnO}_{4}\) is ___________.

\(0.400 \mathrm{~g}\) of an organic compound \((\mathrm{X})\) gave \(0.376 \mathrm{~g}\) of \(\mathrm{AgBr}\) in Carius method for estimation of bromine. \(\%\) of bromine in the compound \((\mathrm{X})\) is ___________.
(Given: Molar mass ...

Given below are two statements:
Statement I : Aqueous solution of K\(_2\)Cr\(_2\)O\(_7\) is preferred as a primary standard in volumetric analysis over Na\(_2\)Cr\(_2\)O\(_7\) aqueous solution.
Statement II : K\(_2\)Cr\(_2\)O\(_7\) has a hi...

In Carius tube, an organic compound '\(\mathrm{X}\)' is treated with sodium peroxide to form a mineral acid 'Y'.
The solution of \(\mathrm{BaCl}_{2}\) is added to '\(\mathrm{Y}\)' to form a precipitate 'Z'. 'Z' is used for the quantitative ...

An organic compound with 51.6% sulfur is heated in a Carius tube. The amount of this compound which will form 0.752 g of barium sulphate is ___________ \(\times\) 10\(-\)1 g.
(Given molar mass of barium sulphate 233 g mol\(-\)1) (Nearest in...

The reagent neutral ferric chloride is used to detect the presence of ______________

Kjeldahl's method was used for the estimation of nitrogen in an organic compound. The ammonia evolved from 0.55 g of the compound neutralised 12.5 mL of 1 M H2SO4 solution. The percentage of nitrogen in the compound is _____________. (Neare...

In bromination of Propyne, with Bromine, 1, 1, 2, 2-tetrabromopropane is obtained in 27% yield. The amount of 1, 1, 2, 2-tetrabromopropane obtained from 1 g of Bromine in this reaction is ___________ \(\times\) 10\(-\)1 g. (Nearest integer)...

In the estimation of bromine, 0.5 g of an organic compound gave 0.40 g of silver bromide. The percentage of bromine in the given compound is _________ % (nearest integer)
(Relative atomic masses of Ag and Br are 108u and 80u, respectively).

A 2.0 g sample containing MnO2 is treated with HCl liberating Cl2. The Cl2 gas is passed into a solution of KI and 60.0 mL of 0.1 M Na2S2O3 is required to titrate the liberated iodine. The percentage of MnO2 in the sample is _____________. ...

The formula of the purple colour formed in Laissaigne's test for sulphur using sodium nitroprusside is :

A sample of \(0.125 \mathrm{~g}\) of an organic compound when analyzed by Duma's method yields \(22.78 \mathrm{~mL}\) of nitrogen gas collected over \(\mathrm{KOH}\) solution at \(280 \mathrm{~K}\) and \(759 \mathrm{~mm}\, \mathrm{Hg}\). Th...

0.25 g of an organic compound containing chlorine gave 0.40 g of silver chloride in Carius estimation. The percentage of chlorine present in the compound is ___________. [in nearest integer]
(Given : Molar mass of Ag is 108 g mol\(-\)1 and ...

In the above reaction, \(5 \mathrm{~g}\) of toluene is converted into benzaldehyde with \(92 \%\) yield. The amount of benzaldehyde produced is ______________ \(\times 10^{-2} \mathrm{~g}\). (Nearest integer)

Given below are two statements :
Statement I : In 'Lassaigne's Test', when both nitrogen and sulphur are present in an organic compound, sodium thiocyanate is formed.
Statement II : If both nitrogen and sulphur are present in an organic com...

While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from \(0.25 \mathrm{~g}\) of the compound neutralized \(2.5 \mathrm{~mL}\) of \(2 \,\mathrm{M} \,\mathrm{H}_{2} \mathrm{SO}_{4}\). The pe...

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

0.2 g of an organic compound was subjected to estimation of nitrogen by Dumas method in which volume of N2 evolved (at STP) was found to be 22.400 mL. The percentage of nitrogen in the compound is _________. [nearest integer]
(Given : Molar...

The transformation occurring in Duma's method is given below :\({C_2}{H_7}N + \left( {2x + {y \over 2}} \right)CuO \to xC{O_2} + {y \over 2}{H_2}O + {z \over 2}{N_2} + \left( {2x + {y \over 2}} \right)Cu\)The value of y is ______________. ...

An organic compound is subjected to chlorination to get compound A using 5.0 g of chlorine. When 0.5 g of compound A is reacted with AgNO3 [Carius Method], the percentage of chlorine in compound A is ____________ when it forms 0.3849 g of A...

When 10 mL of an aqueous solution of KMnO4 was titrated in acidic medium, equal volume of 0.1 M of an aqueous solution of ferrous sulphate was required for complete discharge of colour. The strength of KMnO4 in grams per litre is __________...

The number of moles of CuO, that will be utilized in Dumas method for estimation nitrogen in a sample of 57.5 g of N, N-dimethylaminopentane is _____________ \(\times\) 10\(-\)2. (Nearest integer)

Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian blue coloured colloidal species. It is :

Which one of the following tests used for the identification of functional groups in organic compounds does not use copper reagent?

Which of the following is 'a' FALSE statement ?

Seliwanoff test and Xanthoproteic test are used for the identification of ___________ and ________ respectively.

Which one of the following complexes is violet in colour?

In the sulphur estimation, 0.471 g of an organic compound gave 1.44 g of barium sulphate. The percentage of sulphur in the compound is ____________%. (Nearest integer)(Atomic Mass of Ba = 137 u)

0.8 g of an organic compound was analyzed by Kjeldahl's method for the estimation of nitrogen. If the percentage of nitrogen in the compound was found to be 42%, then ______________ mL of 1 M H2SO4 would have been neutralized by the ammonia...

Which of the following compound is added to the sodium extract before addition of silver nitrate for testing of halogens?

Consider titration of NaOH solution versus 1.25 M oxalic acid solution. At the end point following burette readings were obtained.(i) 4.5 mL(ii) 4.5 mL(iii) 4.4 mL(iv) 4.4 mL(v) 4.4 mLIf the volume of oxalic acid taken was 10.0 mL then the ...

Methylation of 10 g of benzene gave 9.2 g of toluene. Calculate the percentage yield of toluene __________. (Nearest integer)

An inorganic Compound 'X' on treatment with concentrated H2SO4 produces brown fumes and gives dark brown ring with FeSO4 in presence of concentrated H2SO4. Also Compound 'X' gives precipitate 'Y', when its solution in dilute HCl is treated ...

In Carius method, halogen containing organic compound is heated with fuming nitric acid in the presence of :

Reagent, 1-napthylamine and sulphanilic acid in acetic acid is used for the detection of

In the above reaction, 3.9 g of benzene on nitration gives 4.92 g of nitrobenzene. The percentage yield of nitrobenzene in the above reaction is ________%. (Round off to the Nearest Integer).(Given atomic mass : C : 12.0 u, H : 1.0 u, O : 1...

In Duma's method of estimation of nitrogen, 0.1840 g of an organic compound gave 30 mL of nitrogen collected at 287 K and 758 mm of Hg pressure. The percentage composition of nitrogen in the compound is __________. (Round off to the Nearest...

Match List - I with List - II :



List - I Test/Reagents/Observation(s)

List - II Species detected




(a)
Lassaigne's Test
(i)
Carbon


(b)
Cu(II) oxide
(ii)
Sulphur


(c)...

A, B and C are three biomolecules. The results
of the tests performed on them are given
below:
$$
\begin{array}{|l|l|l|l|}
\hline & \begin{array}{l}
\text { Molisch's } \\
\text { Test }
\end{array} & \begin{array}{l}
\text { Barfoed } \\
\...

In an estimation of bromine by Carius method,
1.6 g of an organic compound gave 1.88 g of
AgBr. The mass percentage of bromine in the
compound is _______.
(Atomic mass, Ag = 108, Br = 80 g mol–1)

In Carius method of estimation of halogen,
0.172 g of an organic compound showed
presence of 0.08 g of bromine. Which of these
is the correct structure of the compound?

If you spill a chemical toilet cleaning liquid on
your hand, your first aid would be

The correct match between Item-I and Item-II is :

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The tests performed on compound X and their inferences are :

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