GEAS CHAPTER 1 4

The bond that includes an upper and a lower sharing of electron orbitals

• a pi bond

• a sigma bond

• a hydrogen bond

• a covalent bond

The most active nonmetal has

• a high electronegativity

• a low electronegativity

• a medium electronegativity

• large atomic radii

Can be expressed in grams per liter of a gas

• Density

• Equilibrium constant

• Molar mass

• Molarity

Which of the following statements is true?

• A catalyst cannot lower the activation energy.

• A catalyst can lower the activation energy.

• A catalyst affects only the activation energy of the forward reaction.

• A catalyst affects only the activation energy of the reverse reaction.

What do you call solutions having the same osmotic pressure?

• Isotonic solutions

• Monohydroxic solutions

• Dihydroxic solutions

• Toxic solutions

What is the term used to describe hydrocarbons containing single covalent bonds between carbon atoms?

• alkanes

• alkenes

• alkynes

• allotrope

The smallest whole unit of an element like Uranium is:

• molecule

• atom

• ion

• electron

What refers to the formation and collapse of minute bubbles of vapor in liquid which caused by a combination of reduced pressure and increased velocity in the fluid?

• cavitation

• stress corrosion

• fatigue corrosion

• precipitation

The elements in Group 0 in the periodic table is called

• light metals

• rare earth metals

• noble gas

• heavy metals

A pair of electrical conductors of dissimilar materials so joined as to produce a thermal emf when the junctions are of different temperatures.

• potentiometer

• piezoelectric

• thermocouple

• solar heating