All Free Chemistry MCQs with Answers

• A. Face-centered cubic
• B. Metallic appearance
• C. 1-1 (g) > 1 - 1 (s) Bond lenght
• D. 1-1 (g) < 1 - 1 (s) Bond lenght

Explanation: 1-1 bond distance is 271.5 pm and it is appreciably longer than in gaseous iodine (266.6pm).Option C suggests that the bond length between…

• A. Ionic
• B. Molecular
• C. Covalent
• D. Metallic

Explanation: Molecular crystals are formed by individual molecules held together by various types of intermolecular forces, including London dispersion…

• A. Gas is at high pressure
• B. Collision between particles are elastic
• C. There are weak forces of attraction between particles in gas
• D. Total energy of particles is proportional to the temperature

Explanation: The five main postulates of the KMT are as follows: (1) The particles in a gas are in constant, random motion.

• A. Increases on increasing temperature
• B. Decreases on increasing temperature
• C. Unchanged on changing temperature
• D. Increases some where and decreases

Explanation: The average distance covered by the gas between successive collisions is known as mean free path.The formula given below clearly denotes…

• A. Released
• B. Absorbed
• C. Remain the same
• D. Constant

Explanation: Oppositely charged ions form a crystalline lattice which releases lattice energy.

• A. 2-3
• B. 3-10
• C. 5-20
• D. 20-25
• E. Only 5

Explanation: Monosaccharides can contain carbon atoms ranging from 3-10.

• A. Phenyl acetic acid
• B. Stearic acid
• C. Palmitic acid
• D. Oleic acid

Explanation: Fatty acids are a group of heterogeneous compounds that consist of a long aliphatic alkyl chain which may be saturated or unsaturated and…

• A. S
• B. C
• C. N
• D. All of these

Explanation: Sulfur, carbon, and nitrogen are all essential elements found in all proteins.

• A. Zwitterion
• B. Amphoteric ion
• C. Cation
• D. Anion

Explanation: A zwitterion is a compound with no overall electrical charge, but which contains separate parts which are positively and negatively…

• A. Muscle
• B. Red blood cells
• C. Tendons
• D. Blood Plasma

Explanation: Collagen proteins are present in tendons throughout the body.Collagen is a fibrous protein that is a major component of the extracellular…

• A. Amylose
• B. Glycogen
• C. Cellulose
• D. Glucose

Explanation: Glycogen is known as an animal starch as it is a polymer of glucose stored in the muscles and liver as a an energy reserve.

• A. I only
• B. I and III
• C. I and II
• D. II and III
• E. None of these

Explanation: None of these options are options are correct which makes this option viable and correct.

• A. S
• B. C
• C. N
• D. b and c

Explanation: carbon, and nitrogen are all essential elements found in all proteins., nitrogen is crucial for peptide bond formation and hydrogen…

• A. A: The reaction results in the formation of a simple mixture.
• B. B: Ammonium acetate is formed and converts to acetamide upon heating.
• C. C: The reaction produces only acetic acid in gaseous form.
• D. D: The reaction forms a stable, non-reactive compound.

Explanation: When ammonia gas is passed through acetic acid, ammonium actate salt is formed (acid base reaction).

• A. A: Two separate amino acids
• B. B: A tripeptide molecule
• C. C: A single amino acid
• D. D: A dipeptide molecule

Explanation: The following is the structure of a dipeptide.

• A. Progesterone
• B. Testosterone
• C. Thyroxine
• D. Estrogen

Explanation: Thyroxin exists in two forms T3 and T4. Both are different from each other on the basis of no of Iodine atoms present per molecule of…

• A. Calcium metal
• B. Potassium metal
• C. Sodium metal
• D. Magensium metal

Explanation: The extracellular fluid contains sodium metal abundantly and it plays an important role by maintaining water balance in blood and tissues.

• A. C=O and N-H groups
• B. O-H groups
• C. N-H and C-H groups
• D. F-H groups

Explanation: In protein secondary structures, hydrogen bonds form between the carbonyl oxygen (C=O) of one amino acid and the amide hydrogen (N-H) of…

• A. Folding
• B. Sequence of amino acids
• C. Coiling
• D. Hydrogen bonding pattern

Explanation: The primary structure is the most fundamental level of protein organization.

• A. Peptide bond is a covalent bond
• B. It is a polyamide
• C. It contains different sequences of amino acids in different proteins
• D. Primary structure is due to hydrogen bonding

Explanation: This statement is false. The primary structure of a protein is determined solely by the sequence of amino acids linked by strong, covalent…