JEE Aldehydes, Ketones & Carboxylic Acids PYQs PDF

Given below are two statements:
Statement I: Compound (X), shown below, dissolves in $$NaHCO_{3}$$ solution and has two chiral carbon atoms

Statement II: Compound (Y), shown below, has two carbons with $$sp^{3}$$ hybridization, one carbon with $$sp^{2}$$ and one carbon with sp hybridization

In the light of the above statements, choose the correct answer from the options given below:

Match List - I with List - II.

Choose the correct answer from the options given below:

An organic compound "P" of molecular formula $$C_{6}H_{12}O_{3}$$ gives positive Iodoform test but negative Tollen's test. When "P" is treated with dilute acid, it produces "Q". "Q" gives positive Tollen's test and also iodoform test. The structure of "P" is :

The compound A, $$C_{8}H_{8}O_{2}$$ reacts with acetophenone to form a single product via cross-Aldol condensation. The compound A on reaction with cone. NaOH forms a substituted benzyl alcohol as one of the two products. The compound A is :

The correct sequence of reagents for the above conversion of X to Y is:

Compound 'P' undergoes the following sequence of reactions:

'P' is:

From the given following (A to D) cyclic structures, those which will not react with Tollen's reagent are:

'x' is the product which is obtained &om; propanenitrile and stannous chloride in the presence of hydrochloric acid followed by hydrolysis. 'y' is the product which is obtained from the but-2-ene by the ozonolysis followed by hydrolysis. From the followu1g, which product is not obtained when one mole of 'x' and one mole of 'y' react with, each other in the presence of alkali followed by heating?

Given below are two statements:

Statement I: Phenol on treatment with . $$CHCL_{3}$$/aq. $$KOH$$ under refluxing condition, followed by acidification produces $$p$$-hydroxy benzaldehyde as the major product and $$o$$-hydroxy benzaldehyde as the minor product.

Statement II: The mixture of $$p$$-hydroxybenzaldehyde and $$o$$-
hydroxybenzaldehyde can be easily separated through steam distillation.

In the light of the above statements, choose the correct answer from the options given below

Match the LIST-I with LIST-II

Choose the correct answer from the options given below:

A student is given one compound among the following compounds that gives positive test with Tollen's reagent

The compound is :

Given below are two statements:
Statement I: Cross aldol condensation between two different aldehydes will always produce four different products.
Statement II: When semicarbazide reacts with a mixture of benzaldehyde and acetophenone under optimum pH, it fonns a condensation product with acetophenone only.
In the light of the above statements, choose the correct answer from the options given below

Grignard reagent RMgBr (P) reacts with water and forms a gas (Q). One gram of Q occupies $$1.4 dm^{3}$$ at STP.(P) on reaction with dry ice in dry ether followed by $$H_{3}O^{+}$$ fonns a compound (Z). 0.1 mole of(Z) will weigh ____ g. (Nearest integer)

Given below are two statements for the following reaction sequence.

Statement I: Compound 'Z' will give yellow precipitate with NaOI.
Statement II: Compound 'Q' has two different types of'H' atoms (aromatic:aliphatic) in the ratio 1 :3.
In the light of the above statements, choose the correct answer from the options given below:

Given below are the four isomeric compounds (P, Q, R, S)

Identify correct statements from below
A. Q, R and S will give precipitate with 2, 4 - DNP.
B. P and Q will give positive Bayer's test.
C. Q and R will give sooty flame.
D. Rand S will give yellow precipitate with $$I_{2}/NaOH$$.
E. Q alone will deposit silver with Tollen's reagent.
Choose the correct option.

Iodoform test can differentiate between

A. Methanol and Ethanol
B. $$CH_{3}COOH$$ and $$CH_{3}CH_{2}COOH$$
C. Cyclohexene and cyclohexanone
D. Diethyl ether and Pentan-3-one
E. Anisole and acetone

Choose the correct answer from the options given below:

Which of the following statements are TRUE about Haloform reaction?:

A. Sodium hypochlorite reacts with KI to give KOI.
B. KOI is a reducing agent.

C. $$ \alpha,\beta$$-unsaturated methylketone $$\mathrm{CH_3 - CH = CH - C(=O) - CH_3}$$ will give iodoform reaction.
D. Isopropyl alcohol will not give iodoform test.
E. Methanoic acid will give positive iodoform test.

Choose the correct answer from the options given below:

The correct order of acidic strength of the major products formed in the given reactions, is:

Choose the correct answer from the options given below :

Residue (A) + HCl (dil)$$\rightarrow $$ Compound (B) Structure of residue (A) and Compound (B) formed respectively is :

The compounds which give positive Fehling's test are :

(A).

(B).

(C). $$ HOCH_{2} - CO - (CHOH)_{3}-CH_{2}-OH $$

(D).

(E).

Choose the correct answer from the options given below :

Given below are two statements : Consider the following reaction

A compound 'X' absorbs 2 moles of hydrogen and 'X' upon oxidation with $$KMnO_{4}|H^{+}$$ gives

The total number of $$\sigma$$ bonds present in the compound 'X' is ________.

Aman has been asked to synthesise the molecule

(x).He thought of preparing the molecule using an aldol condensation reaction. He found a few cyclic alkenes in his laboratory. He thought of performing ozonolysis reaction on alkene to produce a dicarbonyl compound followed by aldol reaction to prepare " x ". Predict the suitable alkene that can lead to the formation of " x ".

Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?

Both acetaldehyde and acetone (individually) undergo which of the following reactions? A. Iodoform Reaction B. Cannizaro Reaction C. Aldol Condensation D. Tollen's Test E. Clemmensen Reduction Choose the correct answer from the options given below:

A molecule (" P ") on treatment with acid undergoes rearrangement and gives ("Q"). ("Q") on ozonolysis followed by reflux under alkaline condition gives (" R "). The structure of (" R ") is given below.

The structure of("P")is

The compounds that produce $$CO_{2}$$ with aqueous $$NaHCO_{3}$$ solution are:
A.

B.

C.

D.

E.

Choose the correct answer from the options given below:

The product (P) formed in the following reaction is :

The major product of the following reaction is:

In the Claisen-Schmidt reaction to prepare, dibenzalacetone from 5.3 g of benzaldehyde, a total of 3.51 g of product was obtained. The percentage yield in this reaction was ______ %.

Given below are two statements: Statement I: Acidity of α-hydrogens of aldehydes and ketones is responsible for Aldol reaction. Statement II: Reaction between benzaldehyde and ethanal will NOT give Cross-Aldol product. Choose the most appropriate answer from the options given below :

Identify the product in the following reaction :

The major product of the following reaction is :

Choose the correct answer from options given below:

Highest enol content will be shown by :

Identify A in the following reaction.

Match List - I with List - II.

choose the correct answer from the options given below :

Acid D formed in above reaction is:

Which of the following has highly acidic hydrogen?

The molecular formula of second homologue in the homologous series of mono carboxylic acids is :

The products A and B formed in the following reaction scheme are respectively:

The metal that shows highest and maximum number of oxidation state is :

The spin-only magnetic moment value of the ion among $$Ti^{2+}, V^{2+}, Co^{3+}$$ and $$Cr^{2+}$$, that acts as strong oxidising agent in aqueous solution is ______ BM (Near integer). (Given atomic numbers : $$Ti : 22, V : 23, Cr : 24, Co : 27$$)

In a borax bead test under hot condition, a metal salt (one from the given) is heated at point B of the flame, resulted in green colour salt bead. The spin-only magnetic moment value of the salt is ______ BM (Nearest integer) [Given atomic number of $$Cu = 29, Ni = 28, Mn = 25, Fe = 26$$]

The number of elements from the following that do not belong to lanthanoids is $$Eu, Cm, Er, Tb, Yb$$ and $$Lu$$

Among $$CrO$$, $$Cr_2O_3$$ and $$CrO_3$$, the sum of spin-only magnetic moment values of basic and amphoteric oxides is _______ $$\times 10^{-2}$$ BM (nearest integer). (Given atomic number of Cr is 24)

The difference in the 'spin-only' magnetic moment values of $$KMnO_4$$ and the manganese product formed during titration of $$KMnO_4$$ against oxalic acid in acidic medium is _______ BM. (nearest integer)

Arrange the following elements in the increasing order of number of unpaired electrons in it. (A) Sc (B) Cr (C) V (D) Ti (E) Mn. Choose the correct answer from the options given below :

Among $$VO_2^{+}$$, $$MnO_4^{-}$$ and $$Cr_2O_7^{2-}$$, the spin-only magnetic moment value of the species with least oxidising ability is ___________ BM (Nearest integer). (Given atomic number $$V = 23, Mn = 25, Cr = 24$$)

The 'spin only' magnetic moment value of $$MO_4^{2-}$$ is ______ BM. (Where M is a metal having least metallic radii among $$Sc, Ti, V, Cr, Mn$$ and $$Zn$$). (Given atomic number: $$Sc = 21, Ti = 22, V = 23, Cr = 24, Mn = 25$$ and $$Zn = 30$$)