Chemistry (General Concepts) MCQs with Answers

A material which can pass through any membrane in solution is called?

• A.Colloid
• B.Amorphous
• C.Crystalline
• D.Suspension

Uranium-238 decays to Thorium-234 and has a half-life of 4.5 × 10⁹ years. How many years will it take for 75% of the initial amount to decay?

• A.4.5 × 10⁹ years
• B.18 × 10⁹ years
• C.13.5 × 10⁹ years
• D.9 × 10⁹ years

The general pre-requisite condition for the stable existence of an interface between phases is that ?

• A.Free energy of formation be negative
• B.Free energy of formation be positive
• C.Enthalpy of formation be zero
• D.Entropy of the system be maximum

Which structure has coordination number 12?

• A.Body-Centered Cubic (BCC)
• B.Hexagonal Close-Packed (HCP)
• C.Simple Cubic
• D.Face-Centered Cubic (FCC)

A solid with definite shape and volume is called?

• A.Amorphous solid
• B.Plasma
• C.Liquid crystal
• D.Crystalline solid

Which of the following is an example of a solution?

• A.Sugar and water
• B.Sand and water
• C.Oil and water
• D.Iron filings and sand

Which type of bond is formed between H₂O molecules?

• A.Covalent bond
• B.Metallic bond
• C.Ionic bond
• D.Hydrogen bond

Carbon dioxide dissolution in water, actually represents solute and solvent combination of _?

• A.Gas-liquid solution
• B.Solid-liquid solution
• C.Liquid-liquid solution
• D.Gas-gas solution

CH3-CH2- is _ radical.

• A.Methyl
• B.Ethyl
• C.Propyl
• D.Butyl

The homogenous mixture of two or more substances is called _?

• A.Compound
• B.Solution
• C.Suspension
• D.Colloid