Structure of Carboxylic Acids

Q. when NH3 acts as strong and weak ligand

Q. Which of the following acids does not exhibit optical isomerism?

1. Lactic acid
2. Tartaric acid
3. Maleic acid
4. $\alpha -$ amino acid

Q. Which one of the following ligands forms a chelate

1. Oxalate
2. Cyanide
3. Acetate
4. Ammonia

Q. 24. Why does 1-chloropentane has higher boiling point than 2-chloropentane and 3-chloropentane?

Q.

1. True
2. False

Q. Which of the following(s) is/are ambidentate ligand?

1. $C{N}^{-}$
2. $NO$
3. $CO$
4. All of the above.

Q. What happens to the polarity of CO Bond in an alcohol(R-OH) and an ether(ROR) as the size of R(alkyl) group increases?

Q. When a polydentate ligand uses all its donor atoms simultaneously to bond to a single metal ion it is said to be a ______ ligand

1. unidentate
2. didentate
3. chelate
4. ambidentate

Q. (NH2)2 serves as :- (1) Monodentate ligand, Non-chelating ligand (2) Bridging ligand, negative ligand (3) Bidentate ligand, chelating ligand (4) Bidendate ligand, Bridging ligand

Q. Aldehydes have boiling points lower than those of ______ and higher than those of _______ of comparable molecular masses.

1. alcohol, carboxylic acids
2. alcohol, alkane
3. alkane, alcohol
4. carboxylic acids, alcohols

Q. (NH2)2 serves as :- (1) Monodentate ligand, Non-chelating ligand (2) Bridging ligand, negative ligand (3) Bidentate ligand, chelating ligand (4) Bidendate ligand, Bridging ligand

Q. Which one of the following acids does not exhibit optical isomerism?

1. Lactic acid
2. Tartaric acid
3. Maleic acid
4. $\alpha -$ amino acids

Q. Arrange the following compounds in the order of properties mentioned: a) Pentan-1-ol, Pentan-2-ol, ethanol, Propan-1-ol and methanol.(increasing order of boiling point

Q. Explain stereoisomerism in tartaric acid. How many optical isomers are possible for tartaric acid? What are the differences between meso tartaric acid and racemic mixture?

Q.

Which of the following is a measure of degree of unsaturation in oils and fats?

1. Iodine value

2. Saponification value

3. Acid value

4. Acetyl value

Q. What is number of dichloro product from cyclo pentane ?

Q. How many of the following is/are the incorrect statement about silicones
1.They are made up of $S{i}_4^{4-}$ units
2.They are polymers made up of $R_{2}SiO$ units
3.They are water soluble compounds.
4.They are hydrophilic in nature

Q.

Acetic acid exists as 'X' in vapour state and 'Y' in the liquid state. 'X' and 'Y' are

1. Dimer, Polymer

2. Trimer, Polymer

3. Hexamer, Polymer

4. Trimer, Dimer

Q. Which of the following is the least reactive towards nucleophillic addition reaction?

1. $C{H}_{3}CHO$
2. $C{H}_{3}COC{H}_3$
3. $C{H}_{3}COOH$
4. $HCHO$

Q. In solid state, Boric acid has which type of interaction between layers?

1. Hydrogen bonding
2. Van der Walls' force
3. Covalent bond
4. None of these

Q.

Acetic acid exists as 'X' in vapour state and 'Y' in the liquid state. 'X' and 'Y' are

1. Dimer, Polymer

2. Trimer, Polymer

3. Hexamer, Polymer

4. Trimer, Dimer

Q. Which of the following statement(s) would be incorrect about the following compound?

1. $C_1-N$ and $C_5-N$ bonds are of the same length but both are shorter than the $C_3-N$ bond
2. All three $C-N$ bonds are of the same length
3. $C_1-N$ and $C_5-N$ bonds are of the same length but longer than the $C_3-N$ bond
4. $C_1-N$ and $C_3-N$ bonds are of the same length but shorter than the $C_5-N$ bond

Q. Which of the following statement is true?

1. In vapour phase or in the aprotic solvents, benzoic acid exists as dimer.
2. In vapour phase or in the aprotic solvents, benzoic acid exists as monomer.
3. In vapour phase, benzoic acid exists as dimer and in the aprotic solvents, benzoic acid exists as monomer.
4. In vapour phase, benzoic acid exists as monomer and in the aprotic solvents, benzoic acid exists as dimer.

Q.

Which of the following is a measure of degree of unsaturation in oils and fats?

1. Acetyl value

2. Iodine value

3. Saponification value

4. Acid value

Q. The well known compounds, $(+)-$ lactice acid and $(-)-$ lactic acid, have the same molecular formula, $C_3{H}_6{O}_3$. The correct relationship between them is:

1. geometrical isomerism
2. optical isomerism
3. identicalness
4. constitutional isomerism

Q. Acetic acid exists in a dimer state in benzene, due to __________.

1. condensation reaction
2. presence of $\alpha$ - hydrogen
3. hydrogen bonding
4. presence of carbonyl group

Q. Which of the following acids does not exhibit optical isomerism?

1. Lactic acid
2. Tartaric acid
3. Maleic acid
4. $\alpha -$ amino acid

Q. Which of the following structure of carboxylic acid accounts for the acidic nature

1. 
2. 
3. 
4. None of these

Q. Which of the following is the least reactive towards nucleophillic addition reaction?

1. $C{H}_{3}CHO$
2. $C{H}_{3}COC{H}_3$
3. $C{H}_{3}COOH$
4. $HCHO$

Q. In which of the following properties, the two enantiomers of lactic acid differ from each other?

1. Refractive index
2. Density
3. Sign of specific rotation
4. Melting point