Chemistry (General Concepts) MCQs with Answers

The enthalpy change during the formation of one mole of a compound from its elements in their standard states is called ?

• A.Standard heat of neutralization
• B.Standard heat of combustion
• C.Standard heat of formation
• D.Standard heat of solution

Which of the following bonds would show the strongest absorption in the IR?

• A.Carbon-carbon
• B.Oxygen-hydrogen
• C.Carbon-hydrogen
• D.Nitrogen-hydrogen

The vapour pressure of water at room temperature is 23.8 mm Hg. The vapour pressure of an aqueous solution of sucrose with mole fraction 0.2 is equal to ?

• A.14.28 mm Hg
• B.4.76 mm Hg
• C.23.80 mm Hg
• D.19.04 mm Hg

When N₂ is bombarded with an alpha particle, what are the products?

• A.Nitrogen and Proton
• B.Oxygen and Proton
• C.Carbon and Neutron
• D.Oxygen and Neutron

One of the following is NOT an example of amorphous solids?

• A.Glass
• B.Rubber
• C.Glucose
• D.Plastic

What is the bond angle in a water (H₂O) molecule?

• A.104.5°
• B.109.5°
• C.120°
• D.180°

According to Crystal Field Theory (CFT) in a strong field, how many unpaired electrons are in [Fe(NH3)6]2+?

• A.0
• B.2
• C.4
• D.5

The number of sigma and pi bonds in 1-butene-3-yne is?

• A.7 sigma and 3 pi
• B.8 sigma and 2 pi
• C.9 sigma and 3 pi
• D.7 sigma and 4 pi

The isomer due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called _?

• A.Metamers
• B.Polymers
• C.Tautomers
• D.Isotopes

When the nucleophilicity of a nucleophile, joined to an atom, is found greater than expected, it is known as _ effect?

• A.Alpha
• B.Gamma
• C.Beta
• D.Inductive