NEET Pattern Practice Questions

Stop Revising. Start Scoring.

Sections 1 to 12 taught you the chapter. This section finds out whether you can use it at NEET speed, which is a completely different skill from understanding it. There is no new theory here — just 30 questions built to the NEET pattern (single-correct MCQs, plus the assertion-reason, match-the-column and statement-type formats NEET now uses freely), and a marking scheme that punishes the one thing students do most on this chapter: guessing an order they half remember.

The rules of engagement

Key Point: Do not treat this as a reading exercise. Sit down with a blank sheet, a pen and a timer, and attempt all 30 questions in one unbroken sitting before you look at a single explanation.

[NEET] One minute per question is not a suggestion; it is the whole game. Classification and Periodicity is one of the most "recall-shaped" chapters in NEET Chemistry — there is almost nothing to calculate, so a question should take 30 to 50 seconds: read, place the elements on your mental table, apply the trend, check for an anomaly, mark. If a question is eating two minutes, you are re-deriving a trend you should simply know. Mark it, move on, and come back; that is exactly what you will have to do in the hall.

NEET's guessing maths

That $-1$ is not decoration. Do the arithmetic once and you will never guess blindly again:

[Board] The rule that comes out of that table: narrow first, then commit. Every question below has at least one option that is a "trap" built from a common mistake — Be placed below B in ionization enthalpy, F given the most negative electron gain enthalpy, an isoelectronic ion ranked by charge instead of by nuclear charge, a group number read off the wrong block. Learning to see the trap is what turns a blind guess into a two-option choice, and $+0.25$ into $+1.5$.

What this set covers

That spread is deliberate — it mirrors how NEET actually samples this chapter. The four physical trends (radius, ionization enthalpy, electron gain enthalpy, electronegativity) together account for 14 of the 30 questions, because in the real paper they are where this chapter earns most of its marks; placing an element from its configuration or its $Z$ is the next biggest block. Woven through the set are four assertion-reason questions, two match-the-column questions and two "which statement is correct/incorrect" questions, because NEET uses all three formats and each has its own way of tricking a student who reads too fast.

[NEET] For assertion-reason questions, decide the truth of A and R separately before you even think about whether R explains A. Most wrong answers on this format come from students who judged the pair as a whole — and in this chapter NEET loves a Reason that is true but about the wrong thing (a true statement about size offered as the explanation for an electron-count fact, for instance).

Scoring Yourself Honestly

Mark your sheet with the real scheme — $+4$, $-1$, $0$ — and total it. Do not award yourself half marks for "I knew that one really". The number you get is the number that matters. And note the time you actually took: a 110 in 45 minutes and a 110 in 30 minutes are very different results in a NEET context.

The bands

Read your own answer sheet: the three error piles

Before you touch the explanations, sort your mistakes into three piles. This is the most valuable ten minutes in the whole section.

1. Concept errors — you did not know that the group number of a $d$-block element is the sum of its $ns$ and $(n-1)d$ electrons, that isoelectronic ions shrink as the nuclear charge rises, that nitrogen beats oxygen in ionization enthalpy because of its half-filled $2p^3$, or that chlorine, not fluorine, has the most negative electron gain enthalpy. Fixable by revision, and quickly: the topic map tells you exactly which section to reopen.
2. Execution errors — right idea, wrong placement; you counted $Z = 37$ into period 4 because you forgot krypton is 36; you ranked $\mathrm{Li^+}$ below $\mathrm{Mg^{2+}}$ because "2+ must be smaller" without checking the shell; you took the big jump in successive ionization enthalpies one step too late and landed in the wrong group. Fixable by slowing down for four seconds and writing the configuration instead of doing it in your head.
3. Reading errors — the question asked for the incorrect statement and you picked a correct one; it asked for increasing order and you gave decreasing; it asked for the IUPAC temporary name and you gave the official one; it asked which species is not isoelectronic and you picked one that is. These are the cheapest marks in the paper to win back, and the ones students refuse to take seriously.

Key Point: A student who scores 84 with three concept errors is in far better shape than one who scores 84 with nine reading errors. The first has three things to learn. The second has a habit to break, and habits take longer.

[NEET] In NEET, the assertion-reason, match-the-column and statement-type questions are where reading errors pile up. If two or more of your mistakes are on Q1, Q2, Q4, Q12, Q17, Q18, Q23 or Q29, that is a format problem, not a chemistry problem — practise the format.

[Board] Every explanation below is written as a full step-by-step solution, so this set doubles as revision material. Read the explanation even for the questions you got right — sometimes you got there the slow way, and the fast way is what you will need in the exam hall.