Block Elements (Group 1 and Group 2) Quiz - CBSE Class 11 Science

Free practice quiz: Block Elements (Group 1 and Group 2) (CBSE Class 11 Science). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 11 Science practice quiz has 20 multiple-choice questions on Block Elements (Group 1 and Group 2), and 20 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which of the following is NOT a characteristic of alkali metals (Group 1)?

   1. Low electronegativity
   2. High reactivity
   3. Form +1 ions
   4. High melting points
   Show answer

   Answer: D. High melting points

   Alkali metals have low melting points due to weak metallic bonding.

2. Explain the trend in atomic radii across Group 1.

   1. Increases
   2. Decreases
   3. Remains constant
   4. Irregular trend
   Show answer

   Answer: A. Increases

   Atomic radii increase down the group due to the addition of electron shells.

3. Compare and contrast the reactivity of lithium and sodium.

   1. Lithium is more reactive
   2. Sodium is more reactive
   3. They have equal reactivity
   4. Their reactivity is unpredictable
   Show answer

   Answer: B. Sodium is more reactive

   Sodium has a lower ionization energy than lithium.

4. Describe the biological importance of magnesium and calcium.

   1. Magnesium in chlorophyll, calcium in bones and teeth
   2. Magnesium in bones, calcium in chlorophyll
   3. Both are crucial for nerve impulse transmission only
   4. No significant biological roles
   Show answer

   Answer: A. Magnesium in chlorophyll, calcium in bones and teeth

   Magnesium is essential for photosynthesis, while calcium is vital for structural integrity and various biological processes.

5. Explain the effect of increasing atomic number on the reducing power of alkali metals.

   1. Reducing power decreases
   2. Reducing power increases
   3. Reducing power remains constant
   4. No significant effect
   Show answer

   Answer: B. Reducing power increases

   Reducing power increases down the group due to decreasing ionization energy.

More questions in this quiz

Answers and explanations are in the full quiz.

1. What is the general electronic configuration of alkaline earth metals (Group 2)?
2. Which alkali metal is the most reactive?
3. Which alkaline earth metal is used in the production of cement?
4. Why do alkali metals readily lose one electron?
5. What is the common oxidation state of Group 2 elements?
6. Describe the trend in ionization energies down Group 2.
7. Explain the diagonal relationship between lithium and magnesium.
8. Discuss the anomalous behavior of beryllium compared to other alkaline earth metals.
9. Explain the solubility trends of hydroxides and sulphates of Group 2 elements.
10. Explain the use of sodium in sodium vapor lamps.
11. What are the industrial applications of calcium oxide (lime)?
12. Compare and contrast the thermal stability of carbonates and nitrates of Group 1 and Group 2 metals.
13. Discuss the applications of organomagnesium compounds (Grignard reagents) in organic chemistry.
14. Analyze the factors that influence the reactivity of alkali metals and alkaline earth metals. Explain how these factors interact to determine the relative reactivity of different elements within each group.
15. Explain the trends in the properties of Group 1 and Group 2 elements and correlate these trends with their electronic configurations and positions in the periodic table. Provide examples of how these trends manifest in their chemical reactivity and compound formation.

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