ESAS - CHEMISTRY

EE Board 2017. Anything that occupies space and has a mass

• Matter

• Compound

• Solution

• Gas

EE Board. What type of bond results from sharing of electrons by two atoms?

• atomic

• covalent

• metallic

• ionic

EE Board. Which of the following statements regarding organic substances is FALSE?

• Organic substances generally dissolve in high acid concentration

• all organic matter contains carbon

• organic matter is generally stable at very high temperatures

• organic substances generally do not dissolve in water

EE Board. Which of the following elements and compounds is unstable in its pure form?

• Helium

• Neon

• Carbon dioxide

• Sodium

What refers to the negatively charge component of an atom?

• Electron

• Proton

• Neutron

• Ion

EE Board. What element is known as the lightest metal?

• aluminum

• manganese

• magnesium

• lithium

EE Board. It is the attraction between like molecules

• absorption

• diffusion

• adhesion

• cohesion

EE Board. Which of the following is the strongest type of bonds?

• van der Waals

• metallic

• covalent

• ionic

EE Board. Which are oxidizing and reducing agents in the following reactions?

2CCl₄ + K2CrO₄ --> 2Cl₂CO + CrO₂Cl₂ + 2KCl

• no oxidizing and reducing agent in this reaction

• Chromium (oxidizing); Chlorine (reducing)

• Chorine (oxidizing); Carbon (reducing)

• Oxygen (oxidizing); Chlorine (reducing)

EE Board. When all of the atoms of a molecule are the same, the substance is called ____________.

• a compound

• a chemical

• an element

• an ion