UTME Prep. Chemistry

What type of bond is formed when electrons are shared between atoms?

• Ionic bond

• Covalent bond

• Metallic bond

• Hydrogen bond

What is the difference between a covalent bond and an ionic bond?

• Covalent bonds are stronger than ionic bonds

• Covalent bonds are formed between metals and nonmetals, while ionic bonds are formed between two nonmetals

• Sharing of electrons in covalent bonds and transfer of electrons in ionic bonds

• Sharing of protons in covalent bonds and transfer of protons in ionic bonds

What is the pH of a solution that is considered neutral?

• 10

• 7

• 1

• 5

What are the properties of an acid?

• Sour taste, turn blue litmus paper red, pH less than 7

• No taste, no effect on litmus paper, pH equal to 7

• Sweet taste, turn red litmus paper blue, pH greater than 7

• Bitter taste, turn blue litmus paper red, pH greater than 7

What is the general formula for an alkane?

• CnHn+2

• CnH2n-2

• CnH2n

• CnH2n+2

What is the difference between an alkane and an alkene?

• The difference is in the type of bonds present between carbon atoms.

• The difference is in the number of carbon atoms in the compounds.

• The difference is in the color of the compounds.

• The difference is in the state of matter of the compounds.

What is the atomic number of carbon?

• 6

• 8

• 3

• 12

What is the significance of the periodic table in chemistry?

• It has no significance in chemistry and is only used for decoration.

• The periodic table is only relevant for biology, not chemistry.

• It organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

• It is used to organize elements based on their color and texture.

What is the molar mass of water?

• 22.015 g/mol

• 16.015 g/mol

• 20.015 g/mol

• 18.015 g/mol

How many moles of oxygen are present in 2 moles of water?

• 3 moles

• 4 moles

• 2 moles

• 1 mole