Chemistry (General Concepts) MCQs with Answers

The noble gases are so unreactive because of ?

• A.Complete octet
• B.Half-filled orbitals
• C.High electronegativity
• D.Large atomic size

In t-butyl alcohol, the tertiary carbon is bonded to?

• A.Three H atoms
• B.Two H atoms
• C.One H atom
• D.No H atom

London dispersion forces are also called as ?

• A.Ion–dipole forces
• B.Permanent dipole–dipole forces
• C.Hydrogen bonding forces
• D.Instantaneous dipole–induced dipole forces

Regarding chemical kinetics, the correct statement among the following is:

• A.Both order and molecularity can be in fraction
• B.Order can be in fraction while molecularity cannot be in fraction
• C.Molecularity can be in fraction while order cannot be in fraction
• D.Neither order nor molecularity can be in fraction

If pure p orbitals are used in forming the C-H bonds in CH₄, an angle of 90° would be expected. The observed angles are 109° each. What concept might be useful in explaining the observed angles?

• A.Hybridization
• B.Ionization
• C.Resonance
• D.Isomerism

A piece of matter in pure form is termed as ?

• A.Element
• B.Compound
• C.Substance
• D.Mixture

Which of the bonds shown by a dash --- has the greatest polarity?

• A.H --- F
• B.H --- Cl
• C.H --- Br
• D.H --- I

The geometry and type of hybrid orbital present about the central atom in BF₃ is ?

• A.Trigonal bipyramidal, sp³d
• B.Tetrahedral, sp³
• C.Linear, sp
• D.Trigonal planar, sp²

Which one of these is weakest?

• A.Ionic bond
• B.Covalent bond
• C.Van der Waal's forces
• D.Metallic bond

Which sub shell in the fourth transition series is in the process of completion?

• A.5d
• B.6d
• C.4f
• D.5f