Explore chemical behavior of Halogens and Noble Gases with 12th Class Chemistry Chapter 5 MCQs. Trending terms like halogen quiz, noble gases MCQs, and chemistry periodic trends ensure visibility and readiness.
Which group of elements in the periodic table contains the halogens?
a) Group 1
b) Group 2
c) Group 17
d) Group 18
How many elements are there in the halogen group?
a) 4
b) 5
c) 6
d) 7
Which of the following is not a halogen?
a) Fluorine
b) Chlorine
c) Iodine
d) Argon
What is the electronic configuration of halogens?
a) ns²np³
b) ns²np⁴
c) ns²np⁵
d) ns²np⁶
Among the halogens, which element has the highest electronegativity?
a) Fluorine
b) Chlorine
c) Bromine
d) Iodine
Which halogen is a diatomic gas at room temperature and pressure?
a) Fluorine
b) Chlorine
c) Bromine
d) Iodine
Which halogen is a reddish-brown liquid at room temperature and pressure?
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a) Fluorine
b) Chlorine
c) Bromine
d) Iodine
Which halogen is a purple solid at room temperature and pressure?
a) Fluorine
b) Chlorine
c) Bromine
d) Iodine
Which of the halogens is the least reactive?
a) Fluorine
b) Chlorine
c) Bromine
d) Iodine
Halogens readily form compounds with alkali metals, and the resulting compounds are known as:
a) Halides
b) Oxides
c) Hydrides
d) Sulfides
Which of the following halides is commonly used in table salt?
a) Sodium chloride
b) Potassium chloride
c) Calcium chloride
d) Magnesium chloride
The halogens can displace from their salts.
a) Oxygen
b) Hydrogen
c) Carbon
d) Nitrogen
When chlorine gas reacts with water, what is produced?
a) Hydrochloric acid
b) Chlorous acid
c) Hypochlorous acid
d) Chloric acid
The process of using chlorine gas to disinfect drinking water and swimming pools is called:
a) Chlorination
b) Fluoridation
c) Bromination
d) Iodination
Which of the following is commonly used as a disinfectant and bleaching agent?
a) Fluorine
b) Chlorine
c) Bromine
d) Iodine
Which halogen is commonly used in photography?
a) Fluorine
b) Chlorine
c) Bromine
d) Iodine
What is the electronic configuration of noble gases?
a) ns²
b) ns²np²
c) ns²np⁶
d) ns²np⁶nd¹⁰
Which of the following is not a noble gas?
a) Helium
b) Neon
c) Argon
d) Oxygen
Noble gases are also known as:
a) Inert gases
b) Reactive gases
c) Halides
d) Alkali metals
Why are noble gases considered inert?
a) They are highly reactive
b) They have a full outer electron shell
c) They readily form compounds
d) They have low electronegativity
What is the most abundant noble gas in the Earth’s atmosphere?
a) Helium
b) Neon
c) Argon
d) Krypton
Which noble gas is used in balloons to make them float?
a) Helium
b) Neon
c) Argon
d) Xenon
Which noble gas is used in neon signs?
a) Helium
b) Neon
c) Argon
d) Krypton
Which noble gas is used in photographic flashes?
a) Helium
b) Neon
c) Argon
d) Xenon
Which noble gas is used in some types of lasers?
a) Helium
b) Neon
c) Argon
d) Krypton
Noble gases have boiling points and melting points.
a) High, high
b) High, low
c) Low, high
d) Low, low
What is the boiling point of helium in Celsius?
a) -269°C
b) -196°C
c) -162°C
d) -112°C
What is the boiling point of neon in Celsius?
a) -269°C
b) -196°C
c) -162°C
d) -112°C
What is the boiling point of argon in Celsius?
a) -269°C
b) -196°C
c) -162°C
d) -112°C
What is the boiling point of krypton in Celsius?
a) -269°C
b) -196°C
c) -162°C
d) -112°C
What is the boiling point of xenon in Celsius?
a) -269°C
b) -196°C
c) -162°C
d) -112°C
Noble gases are used in cryogenics to:
a) Generate electricity
b) Create colorful light displays
c) Produce cold temperatures
d) Accelerate particles in accelerators
Which of the following is the lightest noble gas?
a) Helium
b) Neon
c) Argon
d) Krypton
Which of the following is the heaviest noble gas?
a) Helium
b) Neon
c) Argon
d) Xenon
The full outer electron shell of noble gases makes them stable and less likely to:
a) Gain electrons
b) Lose electrons
c) Form compounds
d) Release energy
Noble gases are used in scuba diving to:
a) Inflate the buoyancy control device
b) Absorb carbon dioxide
c) Provide breathing gas
d) Generate light for underwater photography
Which of the following is the second lightest noble gas?
a) Helium
b) Neon
c) Argon
d) Krypton
Which of the following is the second heaviest noble gas?
a) Helium
b) Neon
c) Argon
d) Xenon
Which of the following noble gases is used in lighting due to its bright glow when an electric current passes through it?
a) Helium
b) Neon
c) Argon
d) Krypton
Noble gases are generally chemically unreactive because they have:
a) High electronegativity
b) Low ionization energy
c) A full outer electron shell
d) A high electron affinity
The valence shell of noble gases contains:
a) 1 electron
b) 2 electrons
c) 6 electrons
d) 8 electrons
Which noble gas is used in some types of ion propulsion systems for spacecraft?
a) Helium
b) Neon
c) Argon
d) Xenon
Noble gases are often used in neonatal incubators because they are:
a) Highly reactive
b) Non-toxic
c) Radioactive
d) Highly flammable
Which of the following noble gases is used in some types of anesthesia?
a) Helium
b) Neon
c) Argon
d) Xenon
The term “noble gas” comes from the Latin word “nobilis,” which means:
a) Radioactive
b) Inert
c) Reactive
d) Toxic
Noble gases are often used in neon signs because they emit light when:
a) Heated
b) Exposed to air
c) Exposed to water
d) An electric current is passed through them
Which noble gas is used in some types of arc welding?
a) Helium
b) Neon
c) Argon
d) Krypton
Which of the following noble gases is used in some types of lasers for medical applications?
a) Helium
b) Neon
c) Argon
d) Xenon
The noble gases were the last group of elements to be discovered because of their:
a) High reactivity
b) Low abundance in nature
c) Radioactivity
d) High melting points
Which noble gas is used in some types of lighting due to its ability to produce a bright white light?
a) Helium
b) Neon
c) Argon
d) Xenon
Noble gases are used in double-glazed windows to improve:
a) Thermal insulation
b) Sound insulation
c) Ultraviolet protection
d) Light transmission
The symbol for helium is:
a) H
b) He
c) Ne
d) Ar
The symbol for neon is:
a) H
b) He
c) Ne
d) Ar
The symbol for argon is:
a) H
b) He
c) Ne
d) Ar
The symbol for krypton is:
a) Kr
b) Xe
c) Rn
d) He
The symbol for xenon is:
a) Kr
b) Xe
c) Rn
d) He
The symbol for radon is:
a) Kr
b) Xe
c) Rn
d) He
Which noble gas is used in some types of deep-sea diving to prevent nitrogen narcosis?
a) Helium
b) Neon
c) Argon
d) Xenon
Noble gases are used in neonatal incubators because they are good:
a) Insulators
b) Conductors
c) Reflectors
d) Moderators
Which noble gas is used in some types of fluorescent lamps to produce a greenish glow?
a) Helium
b) Neon
c) Argon
d) Krypton
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