Question

1. when an electronegative atom shares electrons with a less electronegative atom, what is the result?

a) nonpolar covalent bond

b) polar covalent bond

c) hydrogen bond

d) ionic bond

2. In order for an ionic bond to be created, the cation needs to do which of the following

a) donate an electron to the anion

b) accept an electron to the anion

c) share an electron with the anion

d) form a crystalline structure with all the anions

3. hydrogen bonds can be characterized by which of the following

a) hydrogen bonds are electrostatic attractions between the negative end of a molecule and the positive end of another molecule

b) hydrogen bonds require a hydrogen donor and a hydrogen acceptor

c) hydrogen bonds have to involve a hydrogen atom and an electronegative atom like oxygen and nitrogen

d) all of the above

4. water molecules display cohesion, through which of the following

a) hydrogen bonding results in water molecules sticking to other water molecules

b) hydrogen bonding results in water molecules sticking to other polar molecules

c) high surface tension of water

d) both A and C

5. the adhesion of water molecules does which of the following

a) is responsible for capillary action of water that is spontaneous and defies external forces like gravity

b) is where water molecules form hydrogen bonds with polar molecules

c) is where water molecules form hydrogen bonds with each other

d) a and b are correct

Answer 1

1. Answer: b)

• Covalent bonds are formed by sharing of electrons. In covalent bonds non-metals share electrons to achieve lower energy state. If equally shared it is non-polar covalent bond.
• If the atoms involved in the sharing of electrons ( in covalent bonds) have different electronegativity, polar covalent bond results.

2. Answer: a)

• Ionic bond is formed between two ions.
• One ion (usually metal) loses electron and is cation, while the other accepts electron (usually non-metal) and forms anion.

3. Answer: c)

• Hydrogen bond involves bonding of hydrogen with elements attracting electrons like oxygen, nitrogen and fluorine.
• Example water molecule polar parts

4. Answer: d)

• Composed of two elements Hydrogen atom and Oxygen atom.
• Hydrogen atoms in water molecule have partial positive charge. Oxygen has negative charge. This creates a cohesion force.
• Also, water has high surface tension causing a pull between the molecules, creating a cohesive force.

5. Answer: d)

• Hydrogen bond within water molecules also gives them a adhesive force.
• The adhesion between water molecules help them in capillary action.