All Free Chemistry MCQs with Answers

• A. ABA
• B. ABC
• C. ABCD
• D. None of these

Explanation: a) ABA:The ABA arrangement pattern is known as the hexagonal close packing (HCP) structure.

• A. 1 only
• B. 1, 2 and 3
• C. 2 and 3 only
• D. 3 only

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

• A. It is not a true solid
• B. It is attacked by HFl to make designs
• C. Pyrex is the type of glass used in laboratory apparatus
• D. It has a sharp melting point

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

• A. Diamond is the hardest and graphite is softest
• B. Graphite is the hardest while lamp black is softest
• C. Coal is the hardest and coke is softest
• D. Diamond is the hardest and coke is softest

Explanation: Graphite is soft because it has weak intermolecular forces between its layers.

• A. Graphene
• B. Graphite
• C. Diamond
• D. Mercury

Explanation: It is as light as a feather, more than 100 times stronger than steel and a lightning conductor of electricity.

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

Explanation: It has a single type of atom and we have discussed above that among similar atoms covalent bonding is seen.

• A. Graphite
• B. Graphene
• C. Mercury
• D. Diamond

Explanation: It is as light as a feather, more than 100 times stronger than steel and a lightning conductor of electricity.

• A. Sodium chloride
• B. Copper sulphate
• C. Mercury
• D. Aluminium

Explanation: Aluminium metal is both malleable and ductile

• A. Cubic system
• B. Triclinic system
• C. Tetragonal system
• D. Monoclinic system

Explanation: Option A: In the cubic crystal system, all three axes (a, b, c) have equal lengths, and all angles (α, β, γ) are 90 degrees.

• A. Remain fixed
• B. Slip past each other
• C. Rotate
• D. Twist

Explanation: Metals are malleable and ductile because their layers slip past each other on applying pressure.

• A. Critical
• B. Absolute
• C. Transition
• D. None of these

Explanation: The temperature at which two crystalline forms of the same substance coexist in equilibrium with each other.

• A. Size
• B. Capacity
• C. Habit
• D. Property

Explanation: As defined, habit is the shape of a crystal in which it usually grows. This is because crystals are usually obtained by cooling the…

• A. Diamond
• B. Sulphur
• C. Ice
• D. Zinc

Explanation: Diamond is a giant molecular compound with a network of strong covalent bonds between the regularly arranged carbon atoms.

• A. Neutral Excited
• B. Excited De-excited
• C. De-excited Excited
• D. None of these

Explanation: Option B is correct since when a photon arrives at the metal's surface, they are absorbed because there is an energy gap between orbitals…

• A. Critical
• B. Absolute
• C. Transition
• D. None of these options are correct

Explanation: The transition temperature is defined as the temperature at which two allotropic forms of a certain element coexist in dynamic equilibrium…

• A. Triclinic
• B. Tetragonal
• C. Cubic
• D. Rhombohedral

Explanation: The triclinic system is a crystal system of which the unit cell is a prism with crystallographic axes of different lengths (a b c) and of…

• A. Faces
• B. Edges
• C. Angles
• D. All of these

Explanation: When there is a repetition of "faces", "edges", and "angles" in a crystal when it rotates 360 degrees along its axis the crystal is…

• A. Ionic solid
• B. Covalent solid ·
• C. Pseudo solid
• D. Semi solid

Explanation: The answer is C. Pseudo solids are those solids that may have a physical appearance but when the temperature is changed they flow like…

• A. CCl4
• B. AlCl3
• C. CO2
• D. HCl

Explanation: HCl is polar covalent compound as the chloride ion is more electronegative than hydrogen ion.

• A. Polar nature
• B. Non-polar nature
• C. Strength
• D. Nature

Explanation: The 'electronegativity of an atom' determines how strongly it attracts electrons to itself.