The relatively high boiling points of alkanols are due to?

• A. ionic bonding
• B. aromatic character
• C. covalent bonding
• D. hydrogen bonding

aqueous sodium hydroxide can be used to test for the presence of

• A. Ca²⁺
• B. Zn²⁺
• C. Cu²⁺
• D. all of the above

The shape of the hydrocarbon compound CH₄ is

• A. square planar
• B. planar
• C. linear
• D. tetrahedral

Which of these properties gives a solid its definite shape?

• A. strong intermolecular attraction
• B. high melting point
• C. high boiling point
• D. weak intermolecular attraction

How many grams of H₂SO₄ are necessary for the preparation of 0.175 dm3 of M 6.00 M H₂SO₄? (S = 32.06, O = 16.00 H = 1.00)

• A. 206.0 g
• B. 103.0 g
• C. 98.1 g
• D. 51.5 g

The gas that is less dense than air is

• A. nitrogen
• B. chlorine
• C. Carbon(IV) oxide
• D. Oxygen

Which of the following lowers the activation energy of a chemical reaction?

• A. Freezing mixture
• B. Reducing agent
• C. Water
• D. Catalyst

The line observed in the sample hydrogen spectrum are due to emission of?

• A. electrons from the atoms
• B. energy by proton transition
• C. energy by electron transition
• D. neutron from the atom

The element with the electron configuration 1s₂2s₂2p₃ is

• A. calcium
• B. chlorine
• C. oxygen
• D. nitrogen

The characteristic colour of the flame shown when a copper sail moistened with concentrated hydrochloric acid on a platinum wire is put on bunsen burner is

• A. lilac
• B. green
• C. yellow
• D. brick-red