All Free Chemistry MCQs with Answers

• A. Maximum
• B. Minimum
• C. Zero.
• D. Negligible

Explanation: Kp equals Kc times RT to the Δn. Kp is the equilibrium constant. Temperature, just like in all gas laws, needs to be in Kelvin and An…

• A. Spontaneous Reactions
• B. Exothermic Reaction
• C. Reversible Reaction
• D. Combustion Reaction

Explanation: A reversible reaction is a reaction in which the conversion of reactants to products and the conversion of products to reactants occur…

• A. Atoms
• B. Molecules
• C. Ions
• D. Moles

Explanation: Kc and Kp have the same value when reactants and products have the same number of "moles" asKp = Kc (RT)^∆n Since ∆n = 0, RT factor is…

• A. Kc
• B. K
• C. Kp
• D. None of these

Explanation: The answer is C. For partial pressure equilibrium constant will always be denoted as Kp, where 'K' stands for equilibrium ratio of…

• A. Normal
• B. Acidic
• C. Basic
• D. Amphoteric

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

• A. NaHCO3
• B. NaCO3
• C. Na2CO3
• D. Ca(OH)2

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

• A. CH3 NH3 Cl
• B. CH3 O- Na+
• C. C6H5 O-Na+
• D. C6H5NH2
• E. H2NCH2CO2H

Explanation: The sodium salt of phenol, which is weakly acidic. When dissolved in water, it would give a weakly alkaline solution due to the hydrolysis…

• A. Hydration
• B. Hydrolysis
• C. Preventing of rapid hardening
• D. All of the above options are correct

Explanation: During the grinding there is added about 2% of gypsum which prevents the cement from hardening too rapidly.The addition of gypsum…

• A. Each sodium ion is surrounded by six chloride ions and each chloride ions surrounded by six sodium ions
• B. The crystal is face centered cubic structure
• C. Each sodium ion is surrounded by 3 chloride ions and each chloride ion surrounded by 3 sodium ions
• D. Inter molecular forces are present between two oppositely charges ions

Explanation: Explanation for this question will be added soon.

• A. 10
• B. 9
• C. 8
• D. 12

Explanation: The actual coordination number is 6 but the closest one here is 8

• A. Pentagon
• B. Cuboid
• C. Octahedron
• D. Cube

Explanation: Chloride ions are placed in a CCP type of arrangement. It contains chloride ions at the corner and the center of the cube.

• A. Characteristic
• B. Symmetry
• C. Habit
• D. All of these

Explanation: Crystal habit is the characteristic external shape of an individual crystal or crystal group.

• A. Oval
• B. Round
• C. Rectangular
• D. Spherical

Explanation: The ionic radius of an ion is the radius of the ion when it is considered to be a sphere.

• A. 2:1
• B. 2:1:4
• C. 1:1:4
• D. 1:1

Explanation: The term isomorph means when two different substances have the same crystalline shape.

• A. Nucleus
• B. Atom
• C. Orbital
• D. Nodal plane

Explanation: OPTION A: The nucleus of an atom is the central region of an atom where the majority of the mass is concentrated.

• A. Nucleus
• B. Atom
• C. Orbital
• D. Nodal plane

Explanation: An orbital is a three dimensional description of the most likely location of an electron around an atom.

• A. Nucleus
• B. Atom
• C. Orbital
• D. Nodal plane

Explanation: The 'Nodal plane' is a region around the nucleus of an atom, where the probability of coming across an electron is zero or nigh zero.

• A. Nucleus.
• B. Atom.
• C. Orbital.
• D. Nodal Plane.

Explanation: The region where the probability of finding electrons is maximum is called the orbital.

• A. Nodal
• B. Antinodal
• C. Non nodal
• D. Erect

Explanation: "Nodal" plane is a plane that passes through a nucleus where the probability of finding an electron between s-orbital is zero.

• A. First two
• B. First three
• C. In all axis
• D. None of these

Explanation: The lobes of the d-orbitals lie between the x, y , and z-axis hence the first three-axis so the answer is B.