Tag: therapeutic action of different classes of drugs

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Multiple choice chemistry chemistry in daily life antimicrobials and antifertility drugs therapeutic action of different classes of drugs drugs and their classification

Which of the following statements is/are not correct?

  1. Antipyretics are substances which are used to reduce the body temperature.

  2. Analgesics are substance which are used to relieve pain.

  3. Antiseptics and disinfectants can be used for the same purposes.

  4. Antiseptics can be safely applied on living tissues.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Antiseptics and disinfectants cannot be used for the same purposes. Antiseptics are applied to living tissues whereas disinfectants are applied to non living tissues. However, both antiseptics and disinfectants kill micro organisms.

Multiple choice chemistry chemistry in daily life antimicrobials and antifertility drugs therapeutic action of different classes of drugs drugs and their classification

Most contraceptive pills contain:

  1. norethindrone

  2. ethynylestradiol

  3. both A and B

  4. equanil
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Norethindrone is an example of a synthetic progesterone derivative, most widely used as an anti-fertility drug. The estrogen derivative which is used in combination with progesterone derivative is ethynylestradiol (novestrol). So, both are anti-fertility drugs.
Multiple choice chemistry chemistry in daily life antimicrobials and antifertility drugs therapeutic action of different classes of drugs drugs and their classification

1% Phenol is used as

  1. Disinfectant

  2. Antiseptic

  3. Antifertility drug

  4. Artificial sweetener
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

One per cent solution of phenol is used as a disinfectant and $0.2$ per cent solution of phenol is an antiseptic so a higher concentration of the same compound is harmful to the body but can be used as a disinfectant to kill microorganisms on the non-living thing.

Multiple choice chemistry chemistry in daily life antimicrobials and antifertility drugs therapeutic action of different classes of drugs drugs and their classification

Which of the following is an insecticide?

  1. Bakelite

  2. Aspirin

  3. DDT

  4. TNT
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

DDT (dichlorodiphenyltrichloroethane) is an organochlorine insecticide which is a colorless, crystalline solid, tasteless and almost odourless chemical compound.

Trinitrotoluene (2,4,6-trintrotoluene, TNT) is an extensively used explosive, which has been detected in soil and water at military sites and at munitions manufacturing and training operations.

Option C is correct.

Multiple choice chemistry chemistry in daily life antimicrobials and antifertility drugs therapeutic action of different classes of drugs drugs and their classification

Smallpox vaccine contains:

  1. chemical medicines

  2. enzymes

  3. killed or dead microorganisms

  4. living microorganisms
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Smallpox vaccine contains killed or dead microorganisms. The smallpox vaccine helps the body develop immunity to smallpox disease. The vaccine is made from a virus called 'vaccinia' which is a pox-type virus related to smallpox.
Multiple choice chemistry chemistry in daily life antimicrobials and antifertility drugs therapeutic action of different classes of drugs drugs and their classification

The $pK _{a}$ of acetylsalicylic acid (aspirin) is $3.5$. The $pH$ of gastric juice in human stomach is about $2$ to $3$ and the $pH$ in the small intestine is about $8$. Aspirin will be

  1. unionized in the small intestine as well as in the stomach.

  2. completely ionized in the small intestine as well as in the stomach.

  3. ionized in the stomach and almost unionized in the small intestine.

  4. ionized in the small intestine and almost unionized in the stomach.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Aspirin is a weak acid with pKa = 3.5. In the stomach (pH 2-3), pH < pKa, so it remains mostly unionized (protonated). In the intestine (pH 8), pH > pKa, so it becomes ionized (deprotonated).

Multiple choice chemistry chemistry in daily life antimicrobials and antifertility drugs therapeutic action of different classes of drugs drugs and their classification

Which of the following represents a biliquid propellant?

  1. Nitroglycerin + Nitrocellulose
  2. $N _2O _4 +$ acrylic rubber
  3. $N _2O _4 +$ Unsymmetrical dimethylhydrazine

  4. Polybutadiene + Ammonium perchlorate

  5. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Nitroglycerin is combined with nitrocellulose to form gunpowders.

$N _2O _4$ is added to acrylic rubber to increase its tensile strength.

Unsymmetrical dimethylhydrazine with $N _2O _4$ is used as a hypergolic liquid rocket propellant.

Ammonium perchlorate in combination with polybutadiene is used as a solid composite propellant. 

Hence, option C is correct.