MC — Chapter 1 ~ 5

____ has a similar structure to a diamond.

• Carbon nanotube

• Fullerene (C₆₀)

• Graphene

• Quartz

The geometry of electron pairs of NH₃ is ___.

• bent

• linear

• tetrahedral

• trigonal planar

If the total energy absorbed for the bond breaking is greater than the total energy released for bond making, the reaction is ____ reaction.

• Chemical

• Endothermic

• Exothermic

• reversible

Standard enthalpy change is measured at ____ and 760 mmHg.

• 0°C

• 25K

• 298 K

• 273K

____ catalyst is a catalyst that increases the rate of a chemical reaction.

• Heterogeneous

• Homogeneous

• Negative

• Positive

The kinetic energy of a gas is ____ to the temperature.

• directly proportional

• equal

• inversely proportional

• unchanged

The reaction proceeding to the right is called a ____ reaction.

• chemical

• forward

• reverse

• reversible

A decrease in temperature would favour the ____ reaction.

• chemical

• endothermic

• exothermic

• reversible

Lewis acids are ____.

• electron acceptor

• electron donor

• proton acceptor

• proton donors

The pH of the blood is about ____.

• 1.5

• 5.6

• 7

• 7.4