JEE (Advanced) · Chemistry, Class 11
s-Block Elements: JEE Advanced PYQ, 2007–2026
s-Block Elements (Chemistry, Class 11) had no questions in the 40 JEE (Advanced) papers from 2007–2026, but it is in the syllabus and can be asked in any year. Last checked 28 October 2026.
Questions per year, both papers
Year by year.
| Year | Questions |
|---|---|
| 2007 | 0in 2 papers |
| 2008 | 0in 2 papers |
| 2009 | 0in 2 papers |
| 2010 | 0in 2 papers |
| 2011 | 0in 2 papers |
| 2012 | 0in 2 papers |
| 2013 | 0in 2 papers |
| 2014 | 0in 2 papers |
| 2015 | 0in 2 papers |
| 2016 | 0in 2 papers |
| 2017 | 0in 2 papers |
| 2018 | 0in 2 papers |
| 2019 | 0in 2 papers |
| 2020 | 0in 2 papers |
| 2021 | 0in 2 papers |
| 2022 | 0in 2 papers |
| 2023 | 0in 2 papers |
| 2024 | 0in 2 papers |
| 2025 | 0in 2 papers |
| 2026 | 0in 2 papers |
Each year has two papers, and the number of questions has fallen over time, so compare per paper and expect some drift.
Inside the chapter
Topics asked most.
No past question from this chapter has been asked in these papers yet.
Try it
10 s-Block Elements questions to practise.
Our own questions, written in the JEE Advanced pattern and checked, each with an explanation. Pick an option to see the answer.
Q1 · Chemistry · s-Block Elements
Which metal ion is the central metal in chlorophyll, the pigment that absorbs light for photosynthesis?
Answer: (A)
The principle is that magnesium is the metal at the centre of chlorophyll, which is why magnesium is essential for photosynthesis. Chlorophyll's porphyrin ring holds a central Mg2+ ion. Students who mix up chlorophyll with haemoglobin pick Fe2+, and students who remember calcium's structural role may pick Ca2+.
Q2 · Chemistry · s-Block Elements
Which one of the following correctly describes a role of potassium ions inside animal cells?
Answer: (A)
Potassium is the most abundant cation inside cell fluids. NCERT states that it activates many enzymes, participates in the oxidation of glucose to give ATP, and with sodium is responsible for transmitting nerve signals. Clotting involves Ca2+, chlorophyll contains Mg2+, and the main extracellular cation is Na+.
Q3 · Chemistry · s-Block Elements
Which one of the following statements about calcium homeostasis in an adult human is correct?
Answer: (A)
NCERT states that the plasma calcium concentration is regulated at about 100 mg/L by two hormones, calcitonin and parathyroid hormone. It also states that bone is not inert. It is constantly being solubilised and redeposited, to the extent of about 400 mg of calcium per day in adults. Only the first option gets the hormones, the concentration, the dynamic nature of bone and the units all correct. Insulin and glucagon control glucose, not calcium. Treating bone as inert contradicts the remodelling described above. The 400 g figure is a unit error, since the daily turnover is in milligrams.
Q4 · Chemistry · s-Block Elements
Which element is the most abundant metal in the human body by mass?
Answer: (A)
The principle is that calcium is the most abundant metal in the body, with most of it in the skeleton. Students who think about concentrations in blood or cells may pick sodium or potassium. Students who remember magnesium's enzymatic role may pick magnesium. Calcium's large skeletal store makes it the largest by total mass.
Q5 · Chemistry · s-Block Elements
Which of the following arranges calcium, magnesium, iron and copper in decreasing order of their total amounts in an adult human body?
Answer: (A)
The skeleton stores about 1200 g of Ca in an adult, far more than the roughly 25 g of Mg. Iron is a trace metal at about 5 g, and Cu is present at only about 0.06 g. The order is therefore Ca > Mg > Fe > Cu.
Q6 · Chemistry · s-Block Elements
Which statement about sodium ions in the human body is correct?
Answer: (A)
Na+ is the chief extracellular cation, in plasma and interstitial fluid. NCERT lists its roles as nerve signal transmission, regulation of water flow across membranes and transport of sugars and amino acids into cells. Enzyme activation and glucose oxidation belong to K+, which is mainly intracellular. Phosphate-transfer cofactor activity belongs to Mg2+.
Q7 · Chemistry · s-Block Elements
Which ion, moving across the intestinal wall with glucose, is involved in the absorption of glucose from the gut?
Answer: (A)
The principle is that intestinal glucose uptake depends on sodium ions moving into cells together with glucose. A student who knows that Na+ and K+ are both important in membranes may confuse them. Students who remember magnesium or calcium for other roles may choose them, but the co-transported ion is sodium.
Q8 · Chemistry · s-Block Elements
The calcium concentration in blood plasma is held at a nearly constant value. Which option gives both this approximate value and the hormones that maintain it?
Answer: (B)
The calcium concentration in plasma is regulated at about 100 mg/L. Two hormones maintain it: calcitonin and parathyroid hormone. Each wrong option gets either the value or the hormone pair wrong, so both parts must be checked.
Q9 · Chemistry · s-Block Elements
A 70 kg adult body contains about 1200 g of calcium and about 25 g of magnesium. Taking atomic masses Ca = 40 u and Mg = 24 u, what is the approximate ratio of the number of moles of calcium to the number of moles of magnesium in the body?
Answer: (A)
Convert each mass to moles. n(Ca) = 1200 g / 40 g mol^-1 = 30 mol. n(Mg) = 25 g / 24 g mol^-1 = 1.04 mol. Ratio Ca:Mg = 30 / 1.04, about 29. The mass ratio (48) overstates the abundance of Ca because a Ca atom is heavier than a Mg atom.
Q10 · Chemistry · s-Block Elements
In the body, most sodium is present in blood plasma and extracellular fluid mainly as which compound, which helps maintain the osmotic balance of body fluids?
Answer: (A)
The main sodium salt in plasma and extracellular fluid is sodium chloride. Its dissolved ions help control osmotic pressure, so water balance is maintained. Sodium carbonate, hydroxide and sulfate are not the major body fluid sodium compounds. The correct answer is sodium chloride.
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About s-Block Elements in JEE Advanced.
How many questions come from s-Block Elements in JEE Advanced?
s-Block Elements (Chemistry, Class 11) had no questions in the 40 JEE (Advanced) papers from 2007–2026, but it is in the syllabus and can be asked in any year.
Which topics of s-Block Elements are asked most in JEE Advanced?
No past question has been mapped to a topic of this chapter yet.
Is s-Block Elements important for JEE Advanced 2027?
It is in the syllabus in force, so it can be asked. By past papers it ranks 30 of 31 in Chemistry; use that to decide how much time it gets, not whether to study it.
Where can I solve s-Block Elements JEE Advanced previous year questions?
On Nikaalle, free: sign up and practise every past JEE Advanced question from s-Block Elements with an explanation for each, or sit the full papers timed. The ten questions on this page are our own, written in the same pattern.
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