Question 1

The C-H bond of an alkane has an IR absorption for C-H at 2930 cm-1, the analogous C-D absorption would be observed at 2344 cm-1.

Accepted Answer

A) True 
 B)False

Question 2

As Group 14 is descended, the hydrides become less stable.

Accepted Answer

A) True 
 B)False

Question 3

BH4- is using in organic chemistry as a _______ agent where it is a source of H- ions

Accepted Answer

Question 4

Match the enthalpy of formation with the appropriate Group 17 hydrogen halide
--92.3 kJ mol-1

Accepted Answer

A)   HI
B)   HCl
C)   HF
D)   HBrE) All of the above
F) A) and C)

Question 5

The Periodic Table of the elements forms four different types of hydride. Match the type of hydride with the appropriate compound.
-AsH3

Accepted Answer

A)   Electron-rich hydride
B)   Electron-deficient hydride
C)   Ionic hydride
D)   Electron-precise hydrideE) B) and C)
F) A) and D)

Question 6

Match the enthalpy of formation with the appropriate Group 17 hydrogen halide
--271.1 kJ mol-1

Accepted Answer

A)   HI
B)   HCl
C)   HF
D)   HBrE) C) and D)
F) A) and B)

Question 7

Cerium hydride has a structure based on the fluorite structure where cooperative reorganisation of the anion sublattice allows extra hydrogen to be incorporated inside the structure such that x = 0.25. On strong heating all the hydrogen can be liberated from the structure. What percentage of its own mass in hydrogen can Ce absorb within the structure when x =0.25. RAM (g mol-1)  of Ce = 140.12, H = 1.01.

Accepted Answer

A)   1.58%
B)   1.62%
C)   2.18%
D)   2.21%E) A) and B)
F) All of the above

Question 8

Which of the following points suggests that the first hydride in Groups 14-17 exhibit hydrogen bonding. Please select all that apply.

Accepted Answer

A)   There is a steady increase in the boiling point of the hydrides from the second row onwards but the boiling point of the hydride for the first element in any group is anomalously high.
B)   There is a steady increase in the melting point of the hydrides from the second row onwards but the boiling point of the hydride for the first element in any group is anomalously high.
C)   There is a steady decrease in the boiling point of the hydrides from the second row onwards but the boiling point of the hydride for the first element in any group is anomalously high.
D)   There is a steady decrease in the melting point of the hydrides from the second row onwards but the boiling point of the hydride for the first element in any group is anomalously high.E) C) and D)
F) A) and B)

Question 9

Liquid ammonia can undergo self-ionisation to form NH2- and NH4+ .

Accepted Answer

A) True 
 B)False

Question 10

The Periodic Table of the elements forms four different types of hydride. Match the type of hydride with the appropriate compound.
-KH

Accepted Answer

A)   Electron-rich hydride
B)   Electron-deficient hydride
C)   Ionic hydride
D)   Electron-precise hydrideE) None of the above
F) A) and B)

Exam 25: Hydrogen

Match the enthalpy of formation with the appropriate Group 17 hydrogen halide --92.3 kJ mol^-1

Correct Answer
verified

As Group 14 is descended, the hydrides become less stable.

Correct Answer
verified

The Periodic Table of the elements forms four different types of hydride. Match the type of hydride with the appropriate compound. -KH

Correct Answer
verified

Match the enthalpy of formation with the appropriate Group 17 hydrogen halide --271.1 kJ mol^-1

Correct Answer
verified

BH₄^- is using in organic chemistry as a _______ agent where it is a source of H^- ions

Correct Answer
verified

The C-H bond of an alkane has an IR absorption for C-H at 2930 cm^-1, the analogous C-D absorption would be observed at 2344 cm^-1.

Correct Answer
verified

The Periodic Table of the elements forms four different types of hydride. Match the type of hydride with the appropriate compound. -AsH₃

Correct Answer
verified

Which of the following points suggests that the first hydride in Groups 14-17 exhibit hydrogen bonding. Please select all that apply.

Correct Answer
verified

Liquid ammonia can undergo self-ionisation to form NH₂^- and NH₄⁺.

Correct Answer
verified

Correct Answer
verified

Exam 25: Hydrogen

Match the enthalpy of formation with the appropriate Group 17 hydrogen halide --92.3 kJ mol-1

Correct AnswerverifiedShow Answer

As Group 14 is descended, the hydrides become less stable.

Correct AnswerverifiedShow Answer

The Periodic Table of the elements forms four different types of hydride. Match the type of hydride with the appropriate compound. -KH

Correct AnswerverifiedShow Answer

Match the enthalpy of formation with the appropriate Group 17 hydrogen halide --271.1 kJ mol-1

Correct AnswerverifiedShow Answer

BH4- is using in organic chemistry as a _______ agent where it is a source of H- ions

Correct AnswerverifiedShow Answer

The C-H bond of an alkane has an IR absorption for C-H at 2930 cm-1, the analogous C-D absorption would be observed at 2344 cm-1.

Correct AnswerverifiedShow Answer

The Periodic Table of the elements forms four different types of hydride. Match the type of hydride with the appropriate compound. -AsH3

Correct AnswerverifiedShow Answer

Which of the following points suggests that the first hydride in Groups 14-17 exhibit hydrogen bonding. Please select all that apply.

Correct AnswerverifiedShow Answer

Liquid ammonia can undergo self-ionisation to form NH2- and NH4+ .

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Match the enthalpy of formation with the appropriate Group 17 hydrogen halide --92.3 kJ mol^-1

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Match the enthalpy of formation with the appropriate Group 17 hydrogen halide --271.1 kJ mol^-1

Correct Answer
verified

BH₄^- is using in organic chemistry as a _______ agent where it is a source of H^- ions

Correct Answer
verified

The C-H bond of an alkane has an IR absorption for C-H at 2930 cm^-1, the analogous C-D absorption would be observed at 2344 cm^-1.

Correct Answer
verified

The Periodic Table of the elements forms four different types of hydride. Match the type of hydride with the appropriate compound. -AsH₃

Correct Answer
verified

Correct Answer
verified

Liquid ammonia can undergo self-ionisation to form NH₂^- and NH₄⁺.

Correct Answer
verified

Correct Answer
verified