Question 1

Consider the following xenon compounds: (i)XeF₂ (ii)XeF₄ (iii)XeO₄ (iv)XeOF₄ (v)XeO₃ Which of the compounds is(are)polar?

Accepted Answer

Xenon is in Group 18, meaning it already has a full octet and does not typically form covalent bonds. However, in these compounds, xenon has expanded its valence shell and is bonded to highly electronegative elements such as fluorine and oxygen. In XeOF₄ and XeO₃, the presence of lone pairs on the central atom causes the molecule to become asymmetric and polar. Therefore, options (iv) and (v) are polar.

Question 2

Of the atoms below, __________ is the most effective in forming π bonds.

Accepted Answer

Carbon is the most effective in forming π bonds due to its small size, which allows for the formation of stronger and more stable double and triple bonds. Additionally, carbon has four valence electrons, which allows it to participate in multiple bonding.

Question 3

What is the primary commercial use of hydrogen in the United States?

Accepted Answer

The primary commercial use of hydrogen in the United States is for the manufacture of ammonia by the Haber process. This ammonia is then used as a fertilizer and in other industrial processes. The other options, such as rocket fuel and automobile fuel, are still in development and not yet widely used in commercial applications.

Question 4

Of the following, the most nonmetallic element is __________.

Accepted Answer

Fluorine has the highest electronegativity value among the given options and is thus the most nonmetallic element.

Question 5

What is the F-Xe-F bond angle in XeF₂?

Accepted Answer

XeF2 has a linear molecular geometry, resulting in a bond angle of 180°.

Question 6

Isotopes of hydrogen

Accepted Answer

Isotopes of hydrogen have the same atomic number (1) but different mass numbers due to varying numbers of neutrons in the nucleus. For example, hydrogen-1 (the most common form of hydrogen) has no neutrons, while hydrogen-2 (deuterium) has one neutron and hydrogen-3 (tritium) has two neutrons.

Question 7

How many oxygen atoms are bonded to each silicon atom in SiO₂?

Accepted Answer

In the chemical formula SiO2, each silicon atom is bonded to two oxygen atoms. However, the notation SiO₂ seems to be a typographical error or a misinterpretation of chemical notation. Assuming the intended formula is SiO2, which is silicon dioxide, each silicon atom is indeed bonded to four oxygen atoms in the three-dimensional network structure of silicon dioxide (quartz).

Question 8

Which of the following would produce a basic solution?

Accepted Answer

The answer of Which of the following would produce a...

Question 9

Which compound would produce a basic aqueous solution?

Accepted Answer

MgH2 reacts with water to produce Mg(OH)2, a strong base.

Question 10

How are the oxygen-containing compounds of xenon made?

Accepted Answer

Xenon, a noble gas, can form compounds with oxygen, but not through direct combination due to its inert nature. The most common method to synthesize xenon oxygen compounds, such as xenon trioxide (XeO3) and xenon tetroxide (XeO4), involves the reaction of xenon fluorides (like XeF6) with water. This process allows for the incorporation of oxygen atoms into the xenon molecule, forming various oxides of xenon.

Question 11

Of the following, which is an ionic hydride?

Accepted Answer

All the given compounds are ionic hydrides, formed by the reaction of hydrogen with alkali or alkaline earth metals.

Question 12

Of the following compounds, which is the most stable?

Accepted Answer

The answer of Of the following compounds, which is the...

Question 13

Which of the following is a molecular hydride?

Accepted Answer

CH₄ (methane) is a molecular hydride because it consists of covalent bonds between carbon and hydrogen atoms, forming discrete molecules. The other options are ionic or metallic hydrides.

Question 14

What method is used to produce the most hydrogen gas in the United States?

Accepted Answer

The most common method used to produce hydrogen gas in the United States is the reaction of methane with steam, also known as steam reforming. This method accounts for over 95% of hydrogen production in the US. Electrolysis of water is another method, but it is less efficient and more expensive than steam reforming. Zinc with acid, metallic sodium with water, and coke with steam are not commonly used methods for producing hydrogen gas in the US.

Question 15

Which of the following would produce an acidic solution?

Accepted Answer

CO₂ is a molecule that reacts with water to produce carbonic acid, H2CO3, which is a weak acid. MgO and BeH₂ are both basic compounds and do not contribute to acidity. CO is a neutral compound and does not contribute to acidity. Therefore, the only compound that can produce an acidic solution is CO₂.

Question 16

The least electronegative of the elements below is __________.

Accepted Answer

Electronegativity decreases down a group and increases across a period. Hydrogen is in the first period and group 1, while the other elements are in the second period. Therefore, hydrogen is the least electronegative of the given elements.

Question 17

In the following chemical equation Na₃P + 3H₂O → The products (when the equation is balanced)are

Accepted Answer

The balanced chemical equation is: Na₃P + 3H₂O → 3NaOH + PH₃ Therefore, the products are 3NaOH and PH₃. The other options do not have the correct combination of products.

Question 18

Water gas is ________.

Accepted Answer

Water gas is a mixture of hydrogen gas (H2) and carbon monoxide gas (CO). Therefore, the correct choices are H₂ and CO, which are both present in water gas. Choice A and B are not correct because they contain an oxygen atom, which is not present in water gas. Choice C is not correct because it contains both H₂O and CO₂, which are not the only components of water gas.

Question 19

Which one of the following is false concerning tritium?

Accepted Answer

The answer of Which one of the following is false...

Question 20

Which compound would produce an acidic aqueous solution?

Accepted Answer

Compound C contains a sulfhydryl group (-SH) which can ionize in water to produce hydrogen ions (H+), making the solution acidic. The other compounds do not have any functional groups that can ionize to produce H+.

Quiz 22: Chemistry of the Nonmetals

Consider the following xenon compounds: (i) XeF₂ (ii) XeF₄ (iii) XeO₄ (iv) XeOF₄ (v) XeO₃ Which of the compounds is(are) polar?

Of the atoms below, __________ is the most effective in forming π bonds.

What is the primary commercial use of hydrogen in the United States?

Of the following, the most nonmetallic element is __________.

What is the F-Xe-F bond angle in XeF₂?

Isotopes of hydrogen

How many oxygen atoms are bonded to each silicon atom in SiO₂?

Which of the following would produce a basic solution?

Which compound would produce a basic aqueous solution?

How are the oxygen-containing compounds of xenon made?

Of the following, which is an ionic hydride?

Of the following compounds, which is the most stable?

Which of the following is a molecular hydride?

What method is used to produce the most hydrogen gas in the United States?

Which of the following would produce an acidic solution?

The least electronegative of the elements below is __________.

In the following chemical equation Na₃P + 3H₂O → The products (when the equation is balanced) are

Water gas is ________.

Which one of the following is false concerning tritium?

Which compound would produce an acidic aqueous solution?

Quiz 22: Chemistry of the Nonmetals

Consider the following xenon compounds: (i) XeF2 (ii) XeF4 (iii) XeO4 (iv) XeOF4 (v) XeO3 Which of the compounds is(are) polar?

Of the atoms below, __________ is the most effective in forming π bonds.

What is the primary commercial use of hydrogen in the United States?

Of the following, the most nonmetallic element is __________.

What is the F-Xe-F bond angle in XeF2?

Isotopes of hydrogen

How many oxygen atoms are bonded to each silicon atom in SiO2?

Which of the following would produce a basic solution?

Which compound would produce a basic aqueous solution?

How are the oxygen-containing compounds of xenon made?

Of the following, which is an ionic hydride?

Of the following compounds, which is the most stable?

Which of the following is a molecular hydride?

What method is used to produce the most hydrogen gas in the United States?

Which of the following would produce an acidic solution?

The least electronegative of the elements below is __________.

In the following chemical equation Na3P + 3H2O → The products (when the equation is balanced) are

Water gas is ________.

Which one of the following is false concerning tritium?

Which compound would produce an acidic aqueous solution?

Consider the following xenon compounds: (i) XeF₂ (ii) XeF₄ (iii) XeO₄ (iv) XeOF₄ (v) XeO₃ Which of the compounds is(are) polar?

What is the F-Xe-F bond angle in XeF₂?

How many oxygen atoms are bonded to each silicon atom in SiO₂?

In the following chemical equation Na₃P + 3H₂O → The products (when the equation is balanced) are