Tag: chemistry

Questions Related to chemistry

Assertion : Cimetidine is an antacid.
Reason : Antacid increases secretion of HCI from gastric cells.

chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

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

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

  3. If assertion is true but reason is false.

  4. If both assertion and reason are false.

Show answer
Correct Option: C
Explanation:

Climetidine is an antacid which suppress secretion of HCl.

Milk of magnesia is used as:

chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

  1. antichlor

  2. antacid

  3. antiseptic

  4. food preservative

Show answer
Correct Option: B
Explanation:

Milk of magnesia consists of Magnesium hydroxide.

Antacid is a substance which neutralizes stomach acidity and used to relieve heatburn, indigestion. So, we use bases like Magnesium hydroxide or Sodium Carbonate.

Antacids are ______.

chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

  1. drugs or other compounds that inhibits the physiological effects of histamine, used especially in the treatment of allergies.

  2. (of a drug) used to relieve pain.

  3. medicinal drugs taken to reduce tension or anxiety.

  4. (chiefly of a medicine) used to prevent or correct acidity, especially in the stomach.

Show answer
Correct Option: D
Explanation:

Antacid are drugs or medicines used to prevent or correct acidity, especially in the stomach.
Examples are Cimetidine, Ranitidine, etc.

_______ is a substance which neutralizes stomach acidity, which in turn relieves heartburn, indigestion or stomach upset.

chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

  1. Antibiotic

  2. Antacid

  3. Disinfectant

  4. Anti-fertility drug

Show answer
Correct Option: B
Explanation:

An antacid (derived from the word "anti-acid") is a substance which neutralizes stomach acidity, which in turn relieves heartburn, indigestion or stomach upset.
Histamine and cimetidine are examples of antacids.

Which of these was the largest selling antacid?

chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

  1. Cimetidine

  2. Zantac

  3. Sulpha

  4. none of these

Show answer
Correct Option: A
Explanation:

Cimetidine (also called Tegamet) was the largest selling antacid.
It prevent the interaction between histamine and the receptors in the stomach wall, releasing less amount of acid.

Which of the following is an antacid?

chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

  1. Sodium bicarbonate

  2. Magnesium hydroxide

  3. Magnesium carbonate

  4. All of the above

Show answer
Correct Option: D
Explanation:

Examples of antacid include sodium bicarbonate, magnesium hydroxide, magnesium carbonate and aluminium hydroxide, as they are all basic in nature.

Most commonly used antacids are:

chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

  1. weak bases

  2. strong bases

  3. weak acids

  4. strong acids

Show answer
Correct Option: A
Explanation:


Most commonly used antacids are weak bases.
Examples of antacid includes sodium bicarbonate, magnesium hydroxide, magnesium carbonate and aluminium hydroxide. An antacid is the substance which neutralizes the acid and raise the pH to an appropriate level in stomach. They should not be caustic like strong bases.

What is an antacid?

chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

  1. The substance which neutralizes the acid and raises the pH to an appropriate level in stomach.

  2. The substance which neutralizes the acid and lowers the pH to an appropriate level in stomach.

  3. The substance which neutralizes the base and raises the pH to an appropriate level in stomach.

  4. none of these

Show answer
Correct Option: A
Explanation:

An antacid is the substance which neutralizes the acid and raises the pH to an appropriate level in stomach. In other words, antacid is a base which neutralizes excess of acid in the stomach. Examples of antacid include sodium bicarbonate, magnesium hydroxide and aluminium hydroxide. They control the symptoms and not the cause.

Which of the following cannot be used as an antacid?

chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

  1. Rantidine

  2. Cimetidine

  3. Metal hydroxides

  4. None of the above

Show answer
Correct Option: D
Explanation:

Antacid is a drug (or medicine) preventing or correcting acidity, especially in the stomach.
To neutralize the acid in stomach, antacid should be basic in nature.
All three can be used as antacids since they are basic in nature.

The main function of an antacid is:

chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

  1. to neutralize body acid.

  2. to neutralize body base.

  3. both a and b

  4. none of these

Show answer
Correct Option: A
Explanation:

Antacid is a chemical substance which removes excess acid and raises the pH to an appropriate level in stomach, preventing heatburn and upset stomach,