s-Block Elements Practice Questions
NEET · Chemistry · 1556 free MCQs with instant results and detailed explanations.
1556
Total
316
Easy
697
Medium
543
Hard
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Topics in s-Block Elements
Alkaline Earth Metals
485
Important Compounds
585
Alkali Metals
486
Sample Questions from s-Block Elements
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
Which of the following alkali metals has the lowest melting point?
A.
Lithium
B.
Sodium
C.
Potassium
D.
Rubidium
Show Answer & Explanation
Correct Answer: C
Potassium has the lowest melting point among alkali metals, which is due to its larger atomic size and weaker metallic bonds compared to Lithium, Sodium, and Rubidium.
Q2
Easy
What happens when sodium reacts with water?
A.
It forms sodium hydroxide and hydrogen gas.
B.
It forms sodium oxide.
C.
It dissolves without reaction.
D.
It produces no significant reaction.
Show Answer & Explanation
Correct Answer: A
When sodium reacts with water, it produces sodium hydroxide (NaOH) and hydrogen gas (H2), which is a vigorous reaction, releasing heat.
Q3
Easy
Which alkali metal is most reactive with air?
A.
Lithium
B.
Sodium
C.
Potassium
D.
Cesium
Show Answer & Explanation
Correct Answer: D
Cesium is the most reactive alkali metal with air due to its low ionization energy, making it highly prone to oxidation.
Q4
Medium
When sodium reacts with water, which of the following products is formed?
A.
Sodium hydroxide and hydrogen gas
B.
Sodium oxide and oxygen gas
C.
Sodium bicarbonate and carbon dioxide
D.
Sodium chloride and water
Show Answer & Explanation
Correct Answer: A
The reaction of sodium with water produces sodium hydroxide and hydrogen gas, which is a characteristic reaction of alkali metals with water.
Q5
Medium
Which of the following statements about alkali metals is true?
A.
They are all found in their elemental form in nature.
B.
They readily lose one electron to form cations.
C.
They have high melting and boiling points.
D.
They are less reactive than alkaline earth metals.
Show Answer & Explanation
Correct Answer: B
Alkali metals readily lose one electron to form cations, resulting in their characteristic high reactivity, particularly with water and halogens.
Q6
Medium
Which alkali metal is most likely to react violently with water?
A.
Lithium
B.
Sodium
C.
Potassium
D.
Cesium
Show Answer & Explanation
Correct Answer: D
Cesium is the most reactive alkali metal and reacts violently with water, producing a large amount of heat and hydrogen gas.
Q7
Medium
What is the primary reason for the high reactivity of alkali metals?
A.
High electronegativity
B.
Low ionization energy
C.
High atomic radius
D.
Strong metallic bonding
Show Answer & Explanation
Correct Answer: B
Alkali metals have low ionization energy, which allows them to easily lose their outermost electron, leading to high reactivity.
Q8
Hard
Which alkali metal has the highest tendency to lose its outermost electron?
A.
Lithium
B.
Sodium
C.
Potassium
D.
Rubidium
Show Answer & Explanation
Correct Answer: D
Rubidium has the highest atomic size and lowest ionization energy among the alkali metals, making it more likely to lose its outermost electron.
Q9
Hard
When an alkali metal reacts with water, which of the following products is formed?
A.
Metal hydroxide and hydrogen gas
B.
Metal oxide and oxygen gas
C.
Metal chloride and chlorine gas
D.
Metal sulfate and sulfur dioxide
Show Answer & Explanation
Correct Answer: A
Alkali metals react with water to form metal hydroxides and hydrogen gas, a characteristic reaction of these metals.
Q10
Hard
Which of the following alkali metals is most soluble in liquid ammonia?
A.
Lithium
B.
Sodium
C.
Potassium
D.
Rubidium
Show Answer & Explanation
Correct Answer: C
Potassium has a larger atomic size and is more soluble in liquid ammonia due to its lower lattice energy compared to lithium and sodium.
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s-Block Elements — NEET Chemistry Practice Questions Online
This page contains 1556 practice MCQs for the chapter s-Block Elements in NEET Chemistry. The questions are organized by difficulty — 316 easy, 697 medium, 543 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 3 topics, giving you comprehensive coverage of the entire chapter.