The following are uses of radioactive isotopes except?

• A. for a sterilization of medical equipment
• B. tracing reaction paths.
• C. dating elements
• D. radiography

Rusting of iron is an example of

• A. deliquescence
• B. decomposition
• C. displacement reaction
• D. redox reaction

The oxidation of ammonia in excess air produces

• A) N₂O₂
• B) N₂O
• C) NO₂
• D) NO

Fats and oils can be obtained from any of the following sources except

• A. paraffin oil
• B. animals
• C. groundnuts
• D. palm kernel

(a) X and Y belong to the same period in the Periodic Table is a group I element while Y belongs to group VII. State which of the elements would

(i) be a good oxidizing agent

(ii) have the smaller atomic volume

(iii) have the higher ionization potential

(b) Explain your answer in (a)(i) above.

Electrons always occupy the lowest empty energy level is a statement of

• A. Aufbau Principle
• B. Hund's rule
• C. Pauli Exclusion Principle
• D. Periodic law

The property of a chemical reaction that is affected by the presence of a catalyst is

• A. activation energy
• B. free energy
• C. equilibrium position
• D. enthalpy change

A phenomenon where an element exist in different forms in the same physical state is known as

• A. isomerism
• B. amorphism
• C. allotropy
• D. isotopy

Sodium chloride has no solubility product value because of its?

• A. saline nature
• B. high solubility
• C. low solubility
• D. insolubility

C8H18 will undergo the following reactions except

• A. cracking
• B. combustion
• C. substitution
• D. addition