14 October 2026: atoms, constitutions, heritage and economics quiz

Isotopes of the same element — The proton count, and therefore atomic number, is the same. Different neutron counts produce different mass numbers, making them isotopes.

12 and 26 — Atomic number counts protons: 12. Mass number counts protons plus neutrons: 12 + 14 = 26.

Which institution has power to make a decision? — NCERT describes a constitution as determining who has decision-making authority and how that authority is organised.

A rule defining council powers, then a council choice about an event — The first establishes authority and its scope; the second exercises authority under that framework. The student-council example is an original analogy.

The year of inscription on the World Heritage List — UNESCO records inscription in 2003. That recognition date is distinct from the far earlier shelters and paintings.

Natural shelters within sandstone outcrops — UNESCO describes clusters of natural rock shelters in sandstone outcrops at the Vindhyan foothills.

Prices rose by two percent, slower than before — The first increase is 10 percent. The second is 4.4/220 = 2 percent. The rate slowed while the price level continued rising; values are hypothetical.

Its purchases can differ from the index basket and weights — Consumer-price measures aggregate a basket. Households may buy a different mix, and individual prices can change unevenly.

Iris—controls pupil size — NCERT identifies the iris as controlling pupil size, while the retina receives the image and generates signals.

Adjusting the eye lens’s focal length — Accommodation is the lens’s ability to adjust focal length, with its curvature influenced by ciliary muscles.