Reductions Involving Aldehydes or Ketones

Q.

How would you distinguish experimentally between an alcohol and a carboxylic acid?

Q.

What will be produced when Nitrobenzene is on reaction with $\mathrm{Sn}/\mathrm{HCl}$?

Q. Number of monochloro derivatives in isopentane including steriomerism

Q.

What is Frankland reaction?

Q.

Which of the following pair cannot be separated by ${\mathrm{NaHSO}}_3$?

1. 

2. 

3. 

4. 

Q. 10 g MnO2 on reaction with HCl forms 2.24 L of Cl2[g] at NTP, the percentage impurity of MnO2 is MnO2 + 4HCl - MnCl2 + Cl2 + 2H2O

Q. How many of the following can given Fehling solution test ?
(i) $HCHO$ (ii) $C{H}_{3}CHO$ (iii) $PhCHO$
(iv)
(v)
(vi) (vii) Glucose (viii) Fructose

Q. Acetaldehyde reacts with ethyl magnesium bromide to give a product which on hydrolysis gives

1. Butan-1-ol
2. 2-methylpropan-2-ol
3. Butan-2-ol
4. Pentan-1-ol

Q.

The enolic form of acetone contains:

1. 9 sigma bonds, 1 pi bond and 2 lone pairs

2. 8 sigma bonds, 2 pi bonds and 2 lone pairs

3. 10 sigma bonds, 1 pi bond and 1 lone pair

4. 9 sigma bonds, 2 pi bonds and 1 lone pair

Q. Why is the oxide in the higher oxidation state of the element more acidic than the one in lower oxidation state?

Q.

$3$Ammonolysis of alkyl halides followed by the treatment with $\mathrm{NaOH}$ solution can be used to prepare primary, secondary and tertiary amines. The purpose of $\mathrm{NaOH}$ in the reaction is:

1. to remove basic impurities

2. to activate ${\mathrm{NH}}_3$ in the reaction

3. To increase the reactivity of alkyl halide

4. to remove acidic impurities

Q.

Assertion : Formaldehyde cannot be prepared by Rosenmund's reduction.

Reason : Acid chlorides can be reduced into aldehydes with hydrogen in boiling xylene using palladium or platinum as a catalyst supported on barium sulphate. This is known as Rosenmund's reduction.

1. If both assertion and reason are true and the reason is the correct explanation of the assertion.

2. If both assertion and reason are true but reason is not the correct explanation of the assertion.

3. If the assertion and reason both are false.

4. If assertion is true but reason is false.

5. If assertion is false but reason is true.

Q.

Alkenes are called olefins? Give reason.

Q. Acetophenone on reduction with Zn/Hg in the presence of HCl gives

1. Toluene
2. Benzene
3. Ethyl benzene
4. Xylene

Q.

Show the formation of an Ethane Nitrile To Ethanal.

Q.

Ammonia can act as a reducing agent-write a relevant equation for such a reaction.

Q.

The compound that does not give a blue colour in lassaigne's test is

1. Glycine

2. Hydrazine

3. Urea

4. Aniline

Q.

The statements that are True

(A) Methane leads to both global warming and photochemical smog

(B) Methane is generated from paddy fields

(C) Methane is a stronger global warming gas than Carbon dioxide ${\mathrm{CO}}_2$

(D) Methane is a part of reducing smog.

1. (B), (C), (D) only

2. (A), (B), (C) only

3. (A), (B), (D) only

4. (A) and (B) only

Q. How to balance a redox reaction

Q.

What is the role of pyridine in the acylation reaction of amines?

Q. Wurtz reaction fails to explain in case of tertiary alkyl halides reason out

Q. g subshell is characterized by:

1. 
2. 
3. 
4. 

Q. Which of the following is not a characteristic of a pi bond?

1. pi bond is formed only after the formation of sigma bond
2. pi bond results from lateral overlap of atomic orbital
3. pi bond can be formed by hybrid orbitals
4. pi bonds may be formed by overlapping of p- orbitals

Q. Iodoform can be prepared from all except

1. Isobutyl alcohol
2. Ethyl methyl ketone
3. Isopropyl Alcohol
4. 3-methyl-2-butanone

Q.
For conversion of nitrile into aldehyde reagent A will be:

1. $SOC{l}_2,H_3{O}^{+}$
2. $DIBAL-H,H_3{O}^{+}$
3. $RLi,H_3{O}^{+}$
4. $RMgX,H_3{O}^{+}$

Q. Acetone on reaction with Zn(Hg), HCl gives

1. propane
2. Acetaldehyde, $C{O}_2$
3. Acetic acid
4. Ethyl alcohol

Q.

In order to convert aniline to chloro benzene, the reagent(s) needed are

Q. Hybridised orbitals form only sigma bonds?

Q. Choose the correct option(s) for the following reaction sequence.
Consider Q, R and S as major products.

1. 
2. 
3. 
4. 

Q. Choose the correct option(s) for the following reaction sequence.
Consider Q, R and S as major products.

1. 
2. 
3. 
4.