Q. What is the chemical formula for the compound formed between strontium and chlorine? (2019)
A.
SrCl
B.
SrCl2
C.
Sr2Cl
D.
Sr2Cl3
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Solution
Strontium forms a compound with chlorine as SrCl2, where strontium has a +2 charge and chlorine has a -1 charge.
Correct Answer:
B
— SrCl2
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Q. What is the color of the flame produced by burning strontium salts? (2023)
A.
Red
B.
Green
C.
Blue
D.
Yellow
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Solution
Strontium salts produce a red flame when burned.
Correct Answer:
A
— Red
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Q. What is the color of the flame produced by lithium salts? (2019)
A.
Red
B.
Green
C.
Blue
D.
Yellow
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Solution
Lithium salts produce a red flame when burned.
Correct Answer:
A
— Red
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Q. What is the common oxidation state of alkaline earth metals? (2019)
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Solution
Alkaline earth metals typically exhibit a common oxidation state of +2.
Correct Answer:
B
— +2
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Q. What is the common oxidation state of aluminum in its compounds? (2020)
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Solution
Aluminum commonly exhibits an oxidation state of +3 in its compounds.
Correct Answer:
C
— +3
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Q. What is the common oxidation state of iron in Fe2O3? (2019)
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Solution
In Fe2O3, iron has a common oxidation state of +3.
Correct Answer:
C
— +3
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Q. What is the general electronic configuration of alkali metals? (2022)
A.
ns^1
B.
ns^2
C.
ns^2np^1
D.
ns^2np^2
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Solution
The general electronic configuration of alkali metals is ns^1, where n is the principal quantum number.
Correct Answer:
A
— ns^1
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Q. What is the primary characteristic of alkaline earth metals? (2020)
A.
They are highly reactive
B.
They have a +2 oxidation state
C.
They are gases at room temperature
D.
They form covalent bonds
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Solution
Alkaline earth metals typically have a +2 oxidation state due to the loss of two electrons.
Correct Answer:
B
— They have a +2 oxidation state
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Q. What is the primary product of the thermal decomposition of calcium carbonate? (2019)
A.
Calcium oxide
B.
Calcium hydroxide
C.
Calcium bicarbonate
D.
Calcium chloride
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Solution
The thermal decomposition of calcium carbonate (CaCO3) produces calcium oxide (CaO) and carbon dioxide (CO2).
Correct Answer:
A
— Calcium oxide
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Q. What is the primary product when calcium reacts with oxygen? (2022)
A.
Calcium oxide
B.
Calcium hydroxide
C.
Calcium carbonate
D.
Calcium peroxide
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Solution
Calcium reacts with oxygen to form calcium oxide (CaO).
Correct Answer:
A
— Calcium oxide
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Q. What is the primary product when lithium reacts with nitrogen? (2022)
A.
Lithium nitride
B.
Lithium oxide
C.
Lithium hydroxide
D.
Lithium carbonate
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Solution
Lithium reacts with nitrogen to form lithium nitride (Li3N).
Correct Answer:
A
— Lithium nitride
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Q. What is the primary use of calcium carbonate? (2019)
A.
As a fertilizer
B.
In the production of glass
C.
As a building material
D.
In antacids
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Solution
Calcium carbonate is commonly used in antacids to neutralize stomach acid.
Correct Answer:
D
— In antacids
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Q. What is the primary use of lithium in batteries? (2023)
A.
As a conductor
B.
As a cathode material
C.
As an anode material
D.
As an electrolyte
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Solution
Lithium is primarily used as an anode material in lithium-ion batteries due to its high electrochemical potential.
Correct Answer:
C
— As an anode material
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Q. What is the primary use of magnesium in industries? (2021)
A.
Construction
B.
Aerospace
C.
Electronics
D.
Pharmaceuticals
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Solution
Magnesium is primarily used in the aerospace industry due to its lightweight and strength.
Correct Answer:
B
— Aerospace
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Q. What is the primary use of magnesium in industry? (2023)
A.
Construction
B.
Aerospace
C.
Electronics
D.
Pharmaceuticals
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Solution
Magnesium is primarily used in construction and aerospace industries due to its lightweight and strength.
Correct Answer:
B
— Aerospace
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Q. What is the trend in atomic radius as you move down the alkali metal group? (2022)
A.
Increases
B.
Decreases
C.
Remains constant
D.
Increases then decreases
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Solution
The atomic radius increases as you move down the alkali metal group due to the addition of electron shells.
Correct Answer:
A
— Increases
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Q. What is the trend in reactivity of alkali metals down the group? (2022)
A.
Increases
B.
Decreases
C.
Remains constant
D.
Varies irregularly
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Solution
The reactivity of alkali metals increases down the group due to the decrease in ionization energy.
Correct Answer:
A
— Increases
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Q. Which alkali metal is known for its vigorous reaction with water? (2022)
A.
Lithium
B.
Sodium
C.
Potassium
D.
Rubidium
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Solution
Potassium (K) reacts vigorously with water, producing potassium hydroxide and hydrogen gas.
Correct Answer:
C
— Potassium
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Q. Which alkaline earth metal has the highest melting point? (2022)
A.
Beryllium
B.
Magnesium
C.
Calcium
D.
Barium
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Solution
Beryllium has the highest melting point among the alkaline earth metals.
Correct Answer:
A
— Beryllium
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Q. Which alkaline earth metal is known for its use in the production of lightweight alloys? (2023)
A.
Calcium
B.
Barium
C.
Magnesium
D.
Strontium
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Solution
Magnesium is widely used in the production of lightweight alloys due to its low density.
Correct Answer:
C
— Magnesium
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Q. Which alkaline earth metal is used in fireworks for its bright flame? (2021)
A.
Barium
B.
Calcium
C.
Strontium
D.
Magnesium
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Solution
Strontium (Sr) is used in fireworks to produce a bright red flame.
Correct Answer:
C
— Strontium
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Q. Which alkaline earth metal is used in fireworks for producing a bright red flame? (2023)
A.
Strontium
B.
Calcium
C.
Barium
D.
Magnesium
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Solution
Strontium compounds are used in fireworks to produce a bright red flame.
Correct Answer:
A
— Strontium
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Q. Which alkaline earth metal is used in fireworks for producing a bright white light? (2023)
A.
Barium
B.
Calcium
C.
Strontium
D.
Magnesium
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Solution
Strontium is used in fireworks to produce a bright red flame.
Correct Answer:
C
— Strontium
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Q. Which of the following alkali metals is most reactive with water? (2023)
A.
Lithium
B.
Sodium
C.
Potassium
D.
Rubidium
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Solution
Potassium (K) is more reactive with water than Sodium (Na) and Lithium (Li).
Correct Answer:
C
— Potassium
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Q. Which of the following alkaline earth metals has the highest melting point? (2019)
A.
Beryllium
B.
Magnesium
C.
Calcium
D.
Strontium
Show solution
Solution
Beryllium has the highest melting point among the alkaline earth metals.
Correct Answer:
A
— Beryllium
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Q. Which of the following alkaline earth metals is most reactive? (2020)
A.
Beryllium
B.
Calcium
C.
Strontium
D.
Barium
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Solution
Barium is the most reactive alkaline earth metal due to its larger atomic size and lower ionization energy.
Correct Answer:
D
— Barium
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Q. Which of the following alkaline earth metals is the least reactive? (2022)
A.
Barium
B.
Calcium
C.
Magnesium
D.
Strontium
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Solution
Magnesium (Mg) is the least reactive among the alkaline earth metals due to its higher ionization energy compared to the others.
Correct Answer:
C
— Magnesium
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Q. Which of the following alkaline earth metals reacts vigorously with water? (2019)
A.
Beryllium
B.
Calcium
C.
Magnesium
D.
Strontium
Show solution
Solution
Calcium reacts vigorously with water to form calcium hydroxide and hydrogen gas.
Correct Answer:
B
— Calcium
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Q. Which of the following compounds is a common oxidizing agent? (2019)
A.
HCl
B.
KMnO4
C.
NaCl
D.
CaO
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Solution
Potassium permanganate (KMnO4) is a well-known oxidizing agent used in various chemical reactions.
Correct Answer:
B
— KMnO4
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Q. Which of the following compounds is an amphoteric oxide? (2022)
A.
Na2O
B.
MgO
C.
Al2O3
D.
SiO2
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Solution
Aluminum oxide (Al2O3) is an amphoteric oxide, meaning it can react with both acids and bases.
Correct Answer:
C
— Al2O3
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Showing 1 to 30 of 49 (2 Pages)
Inorganic Chemistry - Block Elements MCQ & Objective Questions
Inorganic Chemistry, particularly the study of Block Elements, plays a crucial role in various school and competitive exams. Mastering this topic not only enhances your conceptual understanding but also significantly boosts your score in MCQs and objective questions. Regular practice of these important questions can help you identify key areas and improve your exam preparation effectively.
What You Will Practise Here
Properties and trends of s-block elements
Characteristics of p-block elements
Reactions and compounds of alkali and alkaline earth metals
Important definitions and concepts related to block elements
Key formulas and equations for reactions involving block elements
Diagrams illustrating the periodic trends and properties
Common applications of block elements in real-life scenarios
Exam Relevance
The topic of Inorganic Chemistry - Block Elements is frequently featured in CBSE, State Boards, NEET, and JEE exams. Students can expect questions that assess their understanding of periodic trends, properties, and reactions of these elements. Common question patterns include multiple-choice questions that require not only recall but also application of concepts, making it essential to practice thoroughly.
Common Mistakes Students Make
Confusing the properties of s-block and p-block elements
Overlooking the significance of periodic trends in predicting chemical behavior
Misunderstanding the reactivity patterns of alkali and alkaline earth metals
Neglecting to memorize key definitions and formulas
Failing to interpret diagrams correctly during exams
FAQs
Question: What are the main characteristics of s-block elements?Answer: S-block elements are highly reactive, especially the alkali metals, and they typically form strong bases when reacting with water.
Question: How can I effectively prepare for MCQs on block elements?Answer: Regular practice with objective questions, understanding key concepts, and reviewing common mistakes can greatly enhance your preparation.
Now is the time to take charge of your learning! Dive into our practice MCQs on Inorganic Chemistry - Block Elements and test your understanding. Consistent practice will not only solidify your knowledge but also prepare you for success in your exams!
