Sample paper · NEET Preparation Chemistry

Chemistry · Sample Paper 3

NEET-UG pattern — 45 fresh MCQs on the full Class 11 + 12 Chemistry syllabus, 4 marks each.

45 questions · 180 marks · 45 minutes

Timed, marked on submit · free with an account

General instructions

This paper has 45 multiple-choice questions, each with one correct answer. All are compulsory.
Section A — Q1 to Q22: Class 11 syllabus. Section B — Q23 to Q45: Class 12 syllabus.
Each correct answer earns 4 marks. In the real NEET a wrong answer costs 1 mark; this practice paper does not deduct marks.
Time: 45 minutes — the share of Chemistry in the 180-minute NEET paper.

Section A · Class 11 syllabus

Questions 1–22, 4 marks each.

Question 14 marks
The number of moles in 5.6 L of $O_{2}$ at STP (22.4 L/mol) is
1. A.0.25
2. B.0.5
3. C.1
4. D.2
Question 24 marks
The mass percentage of oxygen in $H_{2} O$ is about
1. A.11.1%
2. B.88.9%
3. C.50%
4. D.66.7%
Question 34 marks
Which orbital is spherical in shape?
1. A.s
2. B.p
3. C.d
4. D.f
Question 44 marks
The number of unpaired electrons in a nitrogen atom is
1. A.1
2. B.2
3. C.3
4. D.5
Question 54 marks
Which has the smallest atomic radius?
1. A.Li
2. B.Be
3. C.B
4. D.C
Question 64 marks
The element with atomic number 17 belongs to
1. A.group 15, period 3
2. B.group 17, period 3
3. C.group 16, period 2
4. D.group 1, period 4
Question 74 marks
The shape of $S F_{4}$ is
1. A.tetrahedral
2. B.see-saw
3. C.square planar
4. D.trigonal bipyramidal
Question 84 marks
Which has the highest bond order?
1. A. $O_{2}$
2. B. $N_{2}$
3. C. $O_{2}^{+}$
4. D. $O_{2}^{-}$
Question 94 marks
The hybridisation of $P C l_{5}$ is
1. A.sp³
2. B.sp³d
3. C.sp³d²
4. D.dsp²
Question 104 marks
For a spontaneous process at all temperatures,
1. A.ΔH > 0, ΔS < 0
2. B.ΔH < 0, ΔS > 0
3. C.ΔH > 0, ΔS > 0
4. D.ΔH < 0, ΔS < 0
Question 114 marks
Which is a state function?
1. A.work
2. B.heat
3. C.internal energy
4. D.path
Question 124 marks
For the equilibrium $H_{2} + I_{2} ⇌ 2 H I$ , increasing pressure
1. A.shifts it forward
2. B.shifts it backward
3. C.has no effect
4. D.stops the reaction
Question 134 marks
The pH of a buffer made from equal concentrations of $N H_{4} O H$ ( $p K_{b} = 4.75$ ) and $N H_{4} C l$ is
1. A.4.75
2. B.9.25
3. C.7
4. D.5.25
Question 144 marks
Which salt gives a basic solution in water?
1. A.NaCl
2. B. $C H_{3} C O O N a$
3. C. $N H_{4} C l$
4. D. $K N O_{3}$
Question 154 marks
The oxidation number of N in $N H_{4}^{+}$ is
1. A.−3
2. B.+3
3. C.+5
4. D.0
Question 164 marks
Which of these is a disproportionation reaction?
1. A. $2 H_{2} O_{2} \to 2 H_{2} O + O_{2}$
2. B. $Z n + C u^{2 +} \to Z n^{2 +} + C u$
3. C. $N a O H + H C l \to N a C l + H_{2} O$
4. D. $C + O_{2} \to C O_{2}$
Question 174 marks
The number of σ bonds in $C H_{2} = C H - C H = C H_{2}$ is
1. A.7
2. B.9
3. C.11
4. D.5
Question 184 marks
Which shows a −I effect?
1. A. $- C H_{3}$
2. B. $- N O_{2}$
3. C. $- C_{2} H_{5}$
4. D. $- C (C H_{3})_{3}$
Question 194 marks
Lassaigne's test detects nitrogen as
1. A.NaCN
2. B.Na₂S
3. C.NaCl
4. D.NaSCN only
Question 204 marks
Markovnikov addition of HCl to propene gives
1. A.1-chloropropane
2. B.2-chloropropane
3. C.1,2-dichloropropane
4. D.propanol
Question 214 marks
Benzene undergoes nitration with
1. A.conc. $H N O_{3}$ + conc. $H_{2} S O_{4}$
2. B.dilute $H N O_{3}$
3. C. $H N O_{2}$
4. D. $N a N O_{3}$ alone
Question 224 marks
Which alkyne gives a white precipitate with ammoniacal $A g N O_{3}$ ?
1. A.but-2-yne
2. B.propyne
3. C.hex-3-yne
4. D.pent-2-yne

Section B · Class 12 syllabus

Questions 23–45, 4 marks each.

Question 234 marks
Which solution has the lowest freezing point?
1. A.0.1 m glucose
2. B.0.1 m urea
3. C.0.1 m NaCl
4. D.0.1 m $N a_{2} S O_{4}$
Question 244 marks
The vapour pressure of a solvent decreases when a non-volatile solute is added. The relative lowering equals
1. A.mole fraction of solvent
2. B.mole fraction of solute
3. C.molality
4. D.molarity
Question 254 marks
The standard emf of a cell with $E_{c a t h o d e}^{\circ} = + 0.80$ V and $E_{an o d e}^{\circ} = - 0.44$ V is
1. A.0.36 V
2. B.1.24 V
3. C.−1.24 V
4. D.0.80 V
Question 264 marks
Kohlrausch's law is used to find
1. A.the emf of a cell
2. B. $Λ_{m}^{\circ}$ of a weak electrolyte
3. C.the rate constant
4. D.pH
Question 274 marks
For a zero-order reaction, the plot of [R] against t is
1. A.a straight line with negative slope
2. B.a curve
3. C.a straight line with positive slope
4. D.parallel to the time axis
Question 284 marks
The rate constant of a reaction depends on
1. A.concentration
2. B.temperature
3. C.time
4. D.volume of vessel
Question 294 marks
Which gas is used in the Haber process along with nitrogen?
1. A.oxygen
2. B.hydrogen
3. C.chlorine
4. D.helium
Question 304 marks
Ozone is a
1. A.reducing agent only
2. B.strong oxidising agent
3. C.neutral gas with no reactivity
4. D.noble gas
Question 314 marks
The structure of $X e F_{2}$ is
1. A.linear
2. B.bent
3. C.tetrahedral
4. D.square planar
Question 324 marks
Which oxoacid of sulphur contains an S–S bond?
1. A. $H_{2} S O_{4}$
2. B. $H_{2} S_{2} O_{7}$
3. C. $H_{2} S_{2} O_{3}$ (thiosulphuric acid)
4. D. $H_{2} S O_{3}$
Question 334 marks
$K M n O_{4}$ in acidic medium acts as an oxidising agent, Mn changing from
1. A.+7 to +2
2. B.+7 to +4
3. C.+6 to +2
4. D.+4 to +2
Question 344 marks
Actinoids show a larger number of oxidation states than lanthanoids because
1. A.5f, 6d and 7s orbitals have comparable energies
2. B.they are radioactive
3. C.they are smaller
4. D.they have no f electrons
Question 354 marks
The number of ions produced by $[C o (N H_{3})_{6}] C l_{3}$ in water is
1. A.2
2. B.3
3. C.4
4. D.6
Question 364 marks
Which complex shows geometrical isomerism?
1. A. $[C o (N H_{3})_{6}]^{3 +}$
2. B. $[P t (N H_{3})_{2} C l_{2}]$
3. C. $[N i (C O)_{4}]$
4. D. $[Z n (N H_{3})_{4}]^{2 +}$
Question 374 marks
The reaction of an alkyl halide with sodium in dry ether is the
1. A.Wurtz reaction
2. B.Sandmeyer reaction
3. C.Finkelstein reaction
4. D.Swarts reaction
Question 384 marks
DDT is a
1. A.pesticide (insecticide)
2. B.antibiotic
3. C.fertiliser
4. D.dye
Question 394 marks
Ethanol on heating with conc. $H_{2} S O_{4}$ at 443 K gives
1. A.diethyl ether
2. B.ethene
3. C.ethanal
4. D.ethanoic acid
Question 404 marks
Phenol reacts with bromine water to form
1. A.o-bromophenol
2. B.2,4,6-tribromophenol
3. C.bromobenzene
4. D.p-bromophenol only
Question 414 marks
Aldol condensation occurs in aldehydes having
1. A.no α-hydrogen
2. B.at least one α-hydrogen
3. C.a benzene ring only
4. D.two carbonyl groups
Question 424 marks
The reagent that converts a carboxylic acid into an acid chloride is
1. A. $S O C l_{2}$
2. B. $N a B H_{4}$
3. C. $K M n O_{4}$
4. D. $Z n / H C l$
Question 434 marks
The carbylamine test is given by
1. A.primary amines
2. B.secondary amines
3. C.tertiary amines
4. D.all amines
Question 444 marks
Aniline is less basic than ammonia because
1. A.its lone pair is delocalised into the benzene ring
2. B.it has no lone pair
3. C.it is more soluble
4. D.it has a –NO₂ group
Question 454 marks
The vitamin that helps in blood clotting is
1. A.vitamin A
2. B.vitamin C
3. C.vitamin K
4. D.vitamin D

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