Inorganic chemistry X-mas quiz part II

What is the name of the compound with this formula: H2SO3?

• sulfur acid

• sulfuric acid

• sulfurous acid

• hyposulfuric acid

Answer explanation

H2SO3 is sulfurous acid, in German schweflige Säure.

H2SO4 is sulfuric acid, in German Schwefelsäure.

In which year was the wave character of electrons experimentally proven?

• 1900

• 1905

• 1927

• 1954

How do you call different modifications of an element?

What is the multiplicity of the ground state of the oxygen molecule O2?

• 0

• 1

• 2

• 3

Which one of the following is NOT an element type?

• Darmstadtium

• Californium

• Einsteinium

• Helvetium

Which of the following is the rarest naturally occurring element on Earth?r

• Astatine

• Uranium

• Plutonium

• Tantalum

Which element has the highest melting point?

• Tungsten

• Carbon

• Platinum

• Gold

How many molecular orbitals are there in a molecule?

• As many as atoms

• As many as electron pairs

• As many as atomic orbitals used to construct them

• Twice as many as atomic orbitals used to construct them

What is the product of the reaction of carbon monoxide and chlorine?

Which of the following is the most exothermic reaction?

• SiO2 + Al

• C + O2

• BH3 + BH3

• H2 + N2