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

Which of the following has the largest wavelength?

A. Visible light
B. X-rays
C. Infrared light
D. Ultraviolet radiation

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

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

Color of the glow produced in the discharge tube:

A. Depends on the pressure in the discharge tube
B. Depends on the metal used as cathode
C. Depends on the gas used in the discharge tube
D. Does not depend on the nature of the gas used in the discharge tube

Covalent network crystals have_____________?

A. Higher melting point then molecular crystals
B. Lower melting point then molecular crystals
C. Discrete molecules linked by van der waals forces
D. Hydrogen bonding