Introduction to Aldehydes and Ketones

Q.

What happens when D-glucose is treated with the following reagents?

(i) HI (ii) Bromine water (iii) HNO₃

Q.

Write a chemical equation of the reaction of ethanoic acid with sodium.

Q.

What is the hybridization of the carbon atom in the acetylene molecule?

Q. The number of carbons having $s{p}^2$ hybridization in cinnamaldehyde are:

1. 3
2. 5
3. 7
4. 9

Q.

Which one is the general formula of monohydric alcohols?

1. ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}}\mathrm{OH}$

2. ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}-2}\mathrm{OH}$

3. ${\mathrm{C}}_{\mathrm{n}+1}{\mathrm{H}}_{2\mathrm{n}}\mathrm{OH}$

4. ${\mathrm{C}}_{2\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}+2}\mathrm{OH}$

Q.

The hybridization of Carbon in ethylene is:

Q.

Does hydrocarbon contain oxygen?

Q.

A compound used as pistachio flavor in ice cream is:

1. acetophenone

2. butyraldehyde

3. muscone

4. vanillin

Q.

The halogen that is used as an antiseptic is:

1. Chlorine

2. Iodine

3. Fluorine

4. Bromine

Q. Which of the following gives unsaturated acid on heating?

1. $C{H}_3\underset{OH}{\underset{|}{CH}}COOH$
2. $C{H}_{3}C{H}_{2}C{H}_{2}COOH$
3. $\underset{OH}{\underset{|}{C}}{H}_{2}C{H}_{2}COOH$
4. All of these

Q.

In the following molecule:

The hybridisation of carbon a, b and c respectively are:

1. sp³, sp², sp²

2. sp³, sp², sp

3. sp³, sp, sp

4. sp³, sp, sp²

Q. Ch3-ch2-ch2-ch=ch-ch3 is an unsymmetrical alkene and what is the major product on its hydrolysis.

Q. What is carbonation and carbonion

Q. In carbonyl compounds, the carbonyl oxygen acts as

1. Lewis acid
2. Lewis base
3. Amphoteric
4. Can not predict

Q. A carbonyl compound with molecular weight 86 does not reduce Fehling's solution but forms crystalline bisulphite derivatives and gives an iodoform test. The possible compounds can be:

1. 2-pentanone and 3-pentanone
2. 2-pentanone and 3-methyl-2-butanone
3. 2-pentanone and pentanal
4. 3-pentanone and 3-methyl-2-butanone

Q. Which of the following statements is incorrect?

1. Mixture of styrene and methyl methacrylate can form ionic addition polymer.
2. Low density polyethylene is a poor conductor of electricity
3. Melamine formaldehyde is a thermosetting polymer.
4. Polypropylene is a thermoplastic polymer.

Q. Ether and alcohol can be distinguished by the reaction with?

Q.

Depict the shape of formula ${\mathrm{C}}_2{\mathrm{H}}_4$(ethene) on the basis of hybridization?

Q. Out of the following compounds, the number of compounds which give a positive haloform test is
(a) Ethanol
(b) Methanol
(c) Acetaldehyde
(d) Acetone
(e) Formaldehyde
(f) Propanaldehyde
(g) 3-pentanone
(h) 2-pentanone

Q. 35. The reagent used for the separation of acetaldehyde from acetophenone is

Q. Which one of the following is a chain growth polymer?

1. Starch
2. Protein
3. Nucleic acid
4. Polystyrene

Q.

___ is a constituent of vinegar and is ___ of the naturally- occurring carboxylic acids.

Q. Which of the following chemicals can be added for sweetening of food items at cooking temperature and does not provide calories?

1. Sucrose
2. Glucose
3. Aspartame
4. Sucralose

Q. The most basic among the following is:

1. $C{H}_3-N{H}_2$
2. $C{H}_3-C{H}_2-N{H}_2$
3. $C{H}_3-NH-C{H}_3$
4. $C{H}_3-CH\left(C{H}_3\right)-N{H}_2$

Q. $\pi$ bonds are formed by the _______ overlap of _______ orbitals.

Q. The number of $s{p}^2$ hybridized carbon atoms in the given compound is:

1. 3
2. 5
3. 4
4. 6

Q. In hypobromite reaction of amide, carbonyl carbon atom is lost as A) CO B) CO2 C) (CO3)2- D) None of these

Q.

The acid that imparts sour taste to butter is :

1. acetic acid

2. oxalic acid

3. lactic acid

4. tartaric acid

Q. What is the oxidation number of carbonyl carbon in acetophenone?

1. $+3$
2. $+1$
3. $+2$
4. Zero

Q. 4-Chloropentan-2-one