All Free Chemistry MCQs with Answers

• A. Functional group
• B. Intermolecular forces
• C. Nature of alkyl groups
• D. Isomerism

Explanation: The boiling point of ether is less than alcohols and phenols because it has weak intermolecular forces as compared to alcohols and phenols.

• A. Dipole dipole attraction
• B. Covalent attraction
• C. Van Der Waal's forces
• D. H-bonding

Explanation: Explanation for this question will be added soon.

• A. CH3CH2OH
• B. CH3OCH3
• C. CH3CH2Cl
• D. All of these

Explanation: Ethanol shows hydrogen bonding. The -OH group in ethanol has a hydrogen atom that can form a hydrogen bond with the lone pair of Electrons…

• A. HI
• B. HF
• C. HCL
• D. HBr

Explanation: We talk about HF, it has strong hydrogen bonding and thus has the highest boiling point.

• A. Ammonia and Carbon
• B. Acetone and Kerosene
• C. Acetone and Chloroform
• D. Water and Neon

Explanation: There exists hydrogen bonding between Acetone and Chloroform. The three Chlorine atoms in Chloroform deprived the carbon atom of its…

• A. Two electronegative atoms
• B. Two electronegative atoms and H atoms
• C. Two H atoms
• D. None of these options are correct

Explanation: Hydrogen bond acts as a bridge between hydrogen atom and two electronegative atoms.

• A. 10
• B. 12
• C. 20
• D. 2

Explanation: Covalent bonds are much stronger than either, 20 times more than the H-bond and 2000 times stronger than the d-d force.

• A. Ionic bond
• B. Metallic bond
• C. H-bond
• D. None of these

Explanation: A hydrogen bond (or H-bond) is a primarily electrostatic force of attraction between a hydrogen (H) atom which is covalently bound to a…

• A. 54 K
• B. 600 K
• C. 54 °C
• D. 600 °C

Explanation: The explanation for this question will be added soon.

• A. 8.314 J mol-3K-3
• B. 1.38J mole-1 K-3
• C. 1.38J mole-1 K-1
• D. 8.314 J mole-1 K-1

Explanation: Physically, the gas constant is the constant of proportionality that relates the energy scale in physics to the temperature scale, when a…

• A. P = nRT
• B. PV = RT
• C. V = nRTP
• D. PV = nRT

Explanation: According to the Ideal Gas equation: The product of Pressure & Volume of a gas bears a constant relation with the product of Universal gas…

• A. PV=nRT
• B. PT=nRv
• C. P=nRT
• D. T=npv/R

Explanation: The ideal gas equation is formulated as: PV = nRT. In this equation, P refers to the pressure of the ideal gas, V is the volume of the…

• A. Temperature is lowered & pressure is increased
• B. Temperature is increased & pressure is lowered
• C. Temperature & pressure both are lowered
• D. Temperature & pressure both are increased

Explanation: To prevent the volume of a given gas from expanding when its mass is increased, you should lower the temperature and increase the pressure…

• A. Volume
• B. Temperature
• C. Pressure
• D. Number of motes

Explanation: While each of these variables (volume, temperature, pressure) can change in different gas laws, the number of moles (n) is generally…

• A. Cannot be predicted
• B. Is reduced to 1/2
• C. Remains unchanged
• D. Is doubled

Explanation: Temp is directly proportionsl to pressure and pressure is inversely proportional to volume.

• A. Temperature and pressure is increased
• B. Temperature is lowered and pressure is decreased
• C. Temperature and pressure is decreased
• D. Temperature is lowered and pressure is increased

Explanation: Option A: Temperature and pressure increased is incorrect because increasing the temperature and pressure would cause the gas to expand…

• A. 8.314 Jmol-1K-1
• B. 8.314 dm 3atm mol-IK-I
• C. 0.0821 dm3atm mol-I K-1
• D. 0.0821 Jmol-1K-1

Explanation: a) 8.314 J mol^(-1) K^(-1)Explanation: This option suggests that the value of the universal gas constant in SI units is 8.314 J mol^(-1)…

• A. 8.314 J/mol x K
• B. 1.38 x 10^-23 J/K
• C. 6.63 x 10^-11 Nm2/kg2
• D. 1.6 x 10^-19 C

Explanation: The dimensions of the universal gas constant R are energy per degree per mole.

• A. Transport protiens
• B. Structural protiens
• C. Genetic protiens
• D. Regulatory protiens

Explanation: The proteins which transfer heredity information from one generation to another are called genetic proteins.

• A. Gelatine
• B. Cheese
• C. Albumin
• D. Gelly

Explanation: The hides and bones of certain animals - often cows and pigs - are boiled, dried, treated with a strong acid or base, and finally filtered…