Tag: chemistry

Questions Related to chemistry

Joining of monomers to form polymers is called as :

chemistry measurement and data processing and analysis spectroscopic identification of organic compounds materials science introduction superconducting metals and x-ray crystallography

  1. polymerization

  2. hydrolysis

  3. condensation

  4. none of the above

Show answer
Correct Option: A
Explanation:

Polymerization is the process of combining many small molecules known as monomers into a covalently bonded chain or network. 


During the polymerization process, some chemical groups may be lost from each monomer. 

The distinct piece of each monomer that is incorporated into the polymer is known as a repeat unit or monomer residue.

Hence the correct option is A.

Analytical chemistry deals with:

chemistry measurement and data processing and analysis spectroscopic identification of organic compounds materials science introduction superconducting metals and x-ray crystallography

  1. experimental study by qualitative means.

  2. experimental studies by quantitative means.

  3. experimental studies both by qualitative and quantitative means.

  4. None of the above

Show answer
Correct Option: C
Explanation:

Analytical chemistry deals with experimental studies both by qualitative and quantitative means. Hence, option C is correct. 

The acidic strength of methoxyphenols are in order

chemistry measurement and data processing and analysis spectroscopic identification of organic compounds materials science introduction superconducting metals and x-ray crystallography

  1. Para > Ortho > Meta > Phenol

  2. Para > Ortho > Phenol > Meta

  3. Meta > Phenol > Ortho > Para

  4. Meta > Phenol > Para > Ortho

Show answer
Correct Option: B

Consider the following reagents
I. ${Br} _{2}$ water  II. Tollen's reagent
III. Fehling's solution which cannot be used to make distinction between an aldose and a ketose?

chemistry measurement and data processing and analysis spectroscopic identification of organic compounds materials science introduction superconducting metals and x-ray crystallography

  1. I, II and III

  2. II and III

  3. I only

  4. II only

Show answer
Correct Option: C

Analytical chemistry deals with experimental study both by :

chemistry measurement and data processing and analysis spectroscopic identification of organic compounds materials science introduction superconducting metals and x-ray crystallography

  1. qualitative means

  2. quantitative means

  3. Both A and B

  4. None of the above

Show answer
Correct Option: C
Explanation:

Analytical chemistry deals with experimental study both by qualitative and quantitative means.

The correct order of the solubility of the different alcohols in water is

chemistry measurement and data processing and analysis spectroscopic identification of organic compounds materials science introduction superconducting metals and x-ray crystallography

  1. n-propyl alcohol > ethyl alcohol >n-butyl alcohol

  2. Ethyl alcohol>n-butyl alcohol>n-propyl alcohol

  3. n-butyl alcohol>n-propyl alcohol>ethyl alcohol

  4. Ethanol>n-propanol>n-butyl alcohol

Show answer
Correct Option: B

Which of the following is not a nucleophile :

chemistry measurement and data processing and analysis spectroscopic identification of organic compounds materials science introduction superconducting metals and x-ray crystallography

  1. $CH _3O^-$

  2. $H _2O$

  3. $CH _3-OCH _3$

  4. $CH _3-\underset{H}{\underset{|}{\overset{+}{O}}} - H$

Show answer
Correct Option: D
Explanation:

Nucleophile are electron rich species, can donate their electron SO, $CH _3-\underset{H}{\underset{|}{\overset{+}{O}}} - H$ is not a Nucleophile.

What is Analytical chemistry?

chemistry measurement and data processing and analysis spectroscopic identification of organic compounds materials science introduction superconducting metals and x-ray crystallography

  1. The study of the separation, identification, and quantification of the chemical components of natural and artificial materials.

  2. The study of the chemical composition and structure of substances.

  3. The study of the only separation of the chemical components of natural and artificial materials.

  4. The study of the only identification of the chemical components of natural and artificial materials.

Show answer
Correct Option: A
Explanation:

Analytical chemistry is the study of the separation, identification, and quantification of the chemical components of natural and artificial materials.

Hence, option A is correct.

How many polypeptide chains are there in 1 $Hb$ molecule?

chemistry measurement and data processing and analysis spectroscopic identification of organic compounds materials science introduction superconducting metals and x-ray crystallography

  1. $2\alpha $ and $2\beta$

  2. $4\alpha$

  3. $4\beta$

  4. $1\alpha $ and $3\beta$

Show answer
Correct Option: A
Explanation:

1 Hb molecule have $2\alpha$ + $2\beta$ polypeptide chains.

Find the odd one out.

chemistry measurement and data processing and analysis spectroscopic identification of organic compounds materials science introduction superconducting metals and x-ray crystallography

  1. Wool

  2. Polyester

  3. Silk

  4. Cotton

Show answer
Correct Option: B
Explanation:

Polyester is synthetic polymer. Wool, silk and cotton are natural polymers.