Hydrogen & Its Compounds
Q. What is the bond angle in water (H2O)?
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A.
90 degrees
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B.
104.5 degrees
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C.
120 degrees
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D.
180 degrees
Solution
The bond angle in water (H2O) is approximately 104.5 degrees.
Correct Answer: B — 104.5 degrees
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Q. What is the main component of the gas used in hydrogen fuel cells?
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A.
Oxygen
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B.
Hydrogen
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C.
Carbon dioxide
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D.
Nitrogen
Solution
The main component of the gas used in hydrogen fuel cells is hydrogen.
Correct Answer: B — Hydrogen
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Q. What is the main component of water gas?
Solution
Water gas is primarily composed of hydrogen (H2) and carbon monoxide (CO).
Correct Answer: A — H2
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Q. What is the main industrial method for producing hydrogen?
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A.
Electrolysis of water
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B.
Steam reforming of natural gas
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C.
Thermal decomposition of water
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D.
Photosynthesis
Solution
The main industrial method for producing hydrogen is steam reforming of natural gas.
Correct Answer: B — Steam reforming of natural gas
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Q. What is the main product of the electrolysis of water?
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A.
Hydrogen gas
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B.
Oxygen gas
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C.
Hydrochloric acid
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D.
Hydrogen peroxide
Solution
The main products of the electrolysis of water are hydrogen gas (H2) and oxygen gas (O2).
Correct Answer: A — Hydrogen gas
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Q. What is the main product of the reaction between hydrogen and oxygen?
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A.
Ozone
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B.
Water
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C.
Hydrogen peroxide
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D.
Hydrochloric acid
Solution
The main product of the reaction between hydrogen and oxygen is water (H2O).
Correct Answer: B — Water
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Q. What is the main product when hydrogen reacts with nitrogen at high temperatures?
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A.
Ammonia
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B.
Hydrazine
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C.
Nitric oxide
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D.
Nitrogen gas
Solution
The main product of the reaction between hydrogen and nitrogen at high temperatures is ammonia (NH3).
Correct Answer: A — Ammonia
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Q. What is the main use of hydrogen in the Haber process?
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A.
To produce ammonia
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B.
To produce water
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C.
To produce hydrogen peroxide
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D.
To produce methane
Solution
In the Haber process, hydrogen is used to produce ammonia (NH3).
Correct Answer: A — To produce ammonia
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Q. What is the molecular formula of hydrogen peroxide?
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A.
H2O
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B.
H2O2
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C.
H2
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D.
O2
Solution
Hydrogen peroxide has the molecular formula H2O2.
Correct Answer: B — H2O2
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Q. What is the molecular formula of water?
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A.
H2O
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B.
H2O2
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C.
HO
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D.
H2
Solution
The molecular formula of water is H2O.
Correct Answer: A — H2O
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Q. What is the oxidation state of hydrogen in H2O?
Solution
In water (H2O), the oxidation state of hydrogen is +1.
Correct Answer: A — +1
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Q. What is the oxidation state of hydrogen in metal hydrides?
Solution
In metal hydrides, hydrogen has an oxidation state of -1.
Correct Answer: C — -1
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Q. What is the oxidation state of hydrogen in most of its compounds?
Solution
In most of its compounds, hydrogen has an oxidation state of +1.
Correct Answer: C — +1
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Q. What is the pH of a neutral solution of hydrogen ions?
Solution
A neutral solution has a pH of 7.
Correct Answer: B — 7
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Q. What is the primary product formed when hydrogen reacts with oxygen?
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A.
Water
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B.
Hydrogen peroxide
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C.
Ozone
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D.
Hydroxyl radical
Solution
The primary product of the reaction between hydrogen and oxygen is water (H2O).
Correct Answer: A — Water
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Q. What is the primary product when hydrogen reacts with oxygen?
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A.
Water
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B.
Hydrogen peroxide
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C.
Ozone
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D.
Hydroxyl radical
Solution
The primary product of the reaction between hydrogen and oxygen is water (H2O).
Correct Answer: A — Water
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Q. What is the primary use of hydrogen in the industry?
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A.
Fertilizers
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B.
Fuel cells
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C.
Plastics
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D.
Glass production
Solution
Hydrogen is primarily used in fuel cells for energy production.
Correct Answer: B — Fuel cells
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Q. Which isotope of hydrogen is known as deuterium?
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A.
H-1
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B.
H-2
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C.
H-3
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D.
H-4
Solution
Deuterium is the isotope of hydrogen with one neutron, denoted as H-2.
Correct Answer: B — H-2
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Q. Which isotope of hydrogen is the most abundant?
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A.
Deuterium
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B.
Tritium
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C.
Protium
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D.
Hydrogen-3
Solution
Protium is the most abundant isotope of hydrogen.
Correct Answer: C — Protium
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Q. Which of the following compounds contains hydrogen in a +1 oxidation state?
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A.
H2O
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B.
H2S
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C.
NaH
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D.
LiH
Solution
In water (H2O), hydrogen has an oxidation state of +1.
Correct Answer: A — H2O
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Q. Which of the following compounds is a strong acid formed from hydrogen?
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A.
HCl
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B.
H2O
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C.
NH3
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D.
CH4
Solution
Hydrochloric acid (HCl) is a strong acid formed from hydrogen.
Correct Answer: A — HCl
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Q. Which of the following compounds is a strong reducing agent?
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A.
H2O
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B.
H2S
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C.
HCl
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D.
H2
Solution
Hydrogen gas (H2) is a strong reducing agent as it can donate electrons to other substances.
Correct Answer: D — H2
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Q. Which of the following hydrogen compounds is used as a reducing agent?
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A.
H2O
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B.
H2
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C.
HCl
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D.
NH3
Solution
Hydrogen gas (H2) is commonly used as a reducing agent in various chemical reactions.
Correct Answer: B — H2
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Q. Which of the following is a characteristic of hydrogen bonding?
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A.
Occurs between two hydrogen atoms
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B.
Involves a hydrogen atom bonded to a highly electronegative atom
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C.
Is stronger than covalent bonds
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D.
Is a type of ionic bond
Solution
Hydrogen bonding occurs when a hydrogen atom is bonded to a highly electronegative atom like oxygen or nitrogen.
Correct Answer: B — Involves a hydrogen atom bonded to a highly electronegative atom
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Q. Which of the following is a characteristic of hydrogen bonds?
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A.
They are stronger than covalent bonds
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B.
They occur between hydrogen and electronegative atoms
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C.
They are permanent
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D.
They are ionic
Solution
Hydrogen bonds occur between hydrogen and highly electronegative atoms like oxygen, nitrogen, or fluorine.
Correct Answer: B — They occur between hydrogen and electronegative atoms
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Q. Which of the following is a characteristic of hydrogen gas?
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A.
It is colorless
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B.
It is heavier than air
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C.
It is non-flammable
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D.
It is a good conductor of electricity
Solution
Hydrogen gas is colorless and highly flammable.
Correct Answer: A — It is colorless
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Q. Which of the following is a compound of hydrogen and carbon?
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A.
H2O
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B.
CH4
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C.
NaH
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D.
HCl
Solution
Methane (CH4) is a compound of hydrogen and carbon.
Correct Answer: B — CH4
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Q. Which of the following is a hydrogen compound that acts as a reducing agent?
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A.
H2O
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B.
H2S
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C.
HCl
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D.
H2O2
Solution
Hydrogen sulfide (H2S) acts as a reducing agent.
Correct Answer: B — H2S
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Q. Which of the following is a hydrogen compound?
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A.
H2O
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B.
CO2
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C.
NaCl
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D.
O2
Solution
Water (H2O) is a compound that contains hydrogen.
Correct Answer: A — H2O
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Q. Which of the following is a property of diatomic hydrogen (H2)?
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A.
It is a liquid at room temperature
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B.
It is highly flammable
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C.
It has a high density
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D.
It is a good conductor of electricity
Solution
Diatomic hydrogen (H2) is highly flammable and can easily ignite in the presence of oxygen.
Correct Answer: B — It is highly flammable
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