A substance which increases the efficiency of a catalyst is termed as:

A. Promoter
B. Activator
C. Retarder
D. Super catalyst

One of the following ways of expressing the concentration of a solution does not depend on temperature. It is__________?

A. Molarity
B. Molality
C. Normality
D. Formality

“Each electron in an atom must have its own unique set of quantum numbers” is a statement of_______________?

A. Aufbau principle
B. Pauli exclusion principle
C. Hund’s rule
D. Periodic law

Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy?

A. radio, visible, infrared, ultraviolet, x-ray, gamma ray
B. radio, infrared, visible, x-ray, gamma ray, ultraviolet
C. visible, radio, infrared, ultraviolet, x-ray, gamma ray
D. radio, infrared, visible, ultraviolet, x-ray, gamma ray

Which of the following has the largest wavelength?

A. visible light
B. x-rays
C. infrared light
D. ultraviolet radiation

Which of the following has the highest energy?

A. gamma rays
B. X-rays
C. Ultra-violet radiation
D. radio waves

All of the following are electromagnetic radiations except__________?

A. Red light
B. Sound waves
C. X-Rays
D. Photon

Second ionization energy:

A. is always less than first ionization energy
B. is always greater than first ionization energy
C. is equal to the first ionization energy
D. may be greater or less than the first ionization energy depending on the nature of the element

Nuclear radiation is emitted by those elements whose:

A. molecules are stable
B. molecules are unstable
C. nuclei are stable
D. nuclei are unstable