Sample paper · NEET Preparation Chemistry

Chemistry · Sample Paper 2

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 mass of 0.2 mol of $C O_{2}$ is
1. A.4.4 g
2. B.8.8 g
3. C.44 g
4. D.2.2 g
Question 24 marks
The empirical formula of a compound with 40% C, 6.7% H and 53.3% O is
1. A. $C H O$
2. B. $C H_{2} O$
3. C. $C_{2} H_{4} O$
4. D. $C H_{3} O$
Question 34 marks
The maximum number of electrons in a shell with n = 3 is
1. A.8
2. B.9
3. C.18
4. D.32
Question 44 marks
Which set of quantum numbers is not allowed?
1. A.n = 3, l = 2, $m_{l}$ = −2
2. B.n = 2, l = 1, $m_{l}$ = 0
3. C.n = 1, l = 1, $m_{l}$ = 0
4. D.n = 4, l = 3, $m_{l}$ = 3
Question 54 marks
Which has the highest first ionisation enthalpy?
1. A.B
2. B.C
3. C.N
4. D.O
Question 64 marks
The most electronegative element is
1. A.O
2. B.Cl
3. C.F
4. D.N
Question 74 marks
The bond order of $N_{2}^{+}$ is
1. A.2
2. B.2.5
3. C.3
4. D.3.5
Question 84 marks
The shape of $N H_{3}$ is
1. A.trigonal planar
2. B.trigonal pyramidal
3. C.tetrahedral
4. D.T-shaped
Question 94 marks
Which has the highest boiling point due to hydrogen bonding?
1. A. $H_{2} S$
2. B. $H_{2} O$
3. C. $H_{2} S e$
4. D. $H_{2} T e$
Question 104 marks
For a reaction in which gas moles decrease ( $Δ n_{g} < 0$ ),
1. A. $Δ H = Δ U$
2. B. $Δ H > Δ U$
3. C. $Δ H < Δ U$
4. D. $Δ H = 0$
Question 114 marks
The enthalpy of formation of an element in its standard state is
1. A.positive
2. B.negative
3. C.zero
4. D.variable
Question 124 marks
Adding a catalyst to a system at equilibrium
1. A.shifts it forward
2. B.shifts it backward
3. C.does not change the equilibrium position
4. D.changes K
Question 134 marks
The pH of a $1 0^{- 3}$ M HCl solution is
1. A.1
2. B.3
3. C.11
4. D.7
Question 144 marks
The conjugate base of $H S O_{4}^{-}$ is
1. A. $H_{2} S O_{4}$
2. B. $S O_{4}^{2 -}$
3. C. $S O_{3}$
4. D. $H S O_{3}^{-}$
Question 154 marks
The oxidation number of Cr in $K_{2} C r_{2} O_{7}$ is
1. A.+3
2. B.+6
3. C.+7
4. D.+12
Question 164 marks
In $Z n + C u S O_{4} \to Z n S O_{4} + C u$ , the oxidising agent is
1. A.Zn
2. B. $C u^{2 +}$
3. C. $S O_{4}^{2 -}$
4. D.Cu
Question 174 marks
Hyperconjugation involves delocalisation of
1. A.π electrons of a double bond
2. B.σ electrons of a C–H bond
3. C.lone pairs
4. D.d electrons
Question 184 marks
Which technique separates a mixture of two liquids with close boiling points?
1. A.simple distillation
2. B.fractional distillation
3. C.sublimation
4. D.crystallisation
Question 194 marks
Which is a nucleophile?
1. A. $N O_{2}^{+}$
2. B. $B F_{3}$
3. C. $N H_{3}$
4. D. $H^{+}$
Question 204 marks
Addition of HBr to propene in the presence of peroxide gives
1. A.2-bromopropane
2. B.1-bromopropane
3. C.1,2-dibromopropane
4. D.propane
Question 214 marks
The Wurtz reaction of ethyl bromide with sodium in dry ether gives
1. A.ethane
2. B.butane
3. C.propane
4. D.ethene
Question 224 marks
Which conformation of ethane is the most stable?
1. A.eclipsed
2. B.staggered
3. C.skew
4. D.all equal

Section B · Class 12 syllabus

Questions 23–45, 4 marks each.

Question 234 marks
The molality of a solution of 18 g glucose in 500 g water is
1. A.0.1 m
2. B.0.2 m
3. C.0.5 m
4. D.1 m
Question 244 marks
The van 't Hoff factor of $A l_{2} (S O_{4})_{3}$ assuming complete dissociation is
1. A.2
2. B.3
3. C.4
4. D.5
Question 254 marks
The unit of molar conductivity is
1. A.S cm $^{- 1}$
2. B.S cm $^{2}$ mol $^{- 1}$
3. C.Ω cm
4. D.S mol $^{- 1}$
Question 264 marks
For a cell reaction with n = 2 and $E^{\circ} = 1.1$ V, $Δ G^{\circ}$ is about
1. A.−106 kJ
2. B.−212 kJ
3. C.+212 kJ
4. D.−53 kJ
Question 274 marks
The unit of the rate constant for a second-order reaction is
1. A.s $^{- 1}$
2. B.mol L $^{- 1}$ s $^{- 1}$
3. C.L mol $^{- 1}$ s $^{- 1}$
4. D.L $^{2}$ mol $^{- 2}$ s $^{- 1}$
Question 284 marks
For a first-order reaction, the time for 99.9% completion is about how many times the half-life?
1. A.2
2. B.5
3. C.10
4. D.100
Question 294 marks
Which noble gas forms the largest number of compounds?
1. A.He
2. B.Ne
3. C.Ar
4. D.Xe
Question 304 marks
The oxidation state of S in $H_{2} S O_{5}$ (peroxomonosulphuric acid) is
1. A.+6
2. B.+8
3. C.+4
4. D.+5
Question 314 marks
Which halogen acid is the strongest in water?
1. A.HF
2. B.HCl
3. C.HBr
4. D.HI
Question 324 marks
The structure of $P C l_{5}$ in the gaseous state is
1. A.tetrahedral
2. B.trigonal bipyramidal
3. C.square pyramidal
4. D.octahedral
Question 334 marks
Which ion is colourless?
1. A. $T i^{3 +}$
2. B. $C u^{2 +}$
3. C. $S c^{3 +}$
4. D. $M n^{2 +}$
Question 344 marks
The most common oxidation state of lanthanoids is
1. A.+2
2. B.+3
3. C.+4
4. D.+5
Question 354 marks
The IUPAC name of $K_{4} [F e (C N)_{6}]$ is
1. A.potassium hexacyanidoferrate(II)
2. B.potassium hexacyanidoferrate(III)
3. C.potassium ferrocyanide(III)
4. D.tetrapotassium iron cyanide
Question 364 marks
$[N i (C O)_{4}]$ is
1. A.square planar and paramagnetic
2. B.tetrahedral and diamagnetic
3. C.octahedral
4. D.square planar and diamagnetic
Question 374 marks
SN2 reactions proceed with
1. A.retention of configuration
2. B.inversion of configuration
3. C.racemisation
4. D.no stereochemical change
Question 384 marks
Chloroform on exposure to air and light forms
1. A. $C C l_{4}$
2. B. $C O C l_{2}$
3. C. $C H_{2} C l_{2}$
4. D. $C l_{2}$
Question 394 marks
Phenol on treatment with $C H C l_{3}$ and aqueous NaOH followed by acid gives
1. A.salicylic acid
2. B.salicylaldehyde
3. C.benzaldehyde
4. D.picric acid
Question 404 marks
Which is the most acidic?
1. A.ethanol
2. B.phenol
3. C.p-nitrophenol
4. D.p-cresol
Question 414 marks
Which compound gives a positive iodoform test?
1. A.methanal
2. B.propanal
3. C.propanone
4. D.benzaldehyde
Question 424 marks
Which is the strongest acid?
1. A. $C H_{3} C O O H$
2. B. $C l C H_{2} C O O H$
3. C. $C l_{2} C H C O O H$
4. D. $C l_{3} C C O O H$
Question 434 marks
Benzenediazonium chloride on warming with water gives
1. A.aniline
2. B.phenol
3. C.chlorobenzene
4. D.benzene
Question 444 marks
Hinsberg's reagent is
1. A.benzenesulphonyl chloride
2. B.acetyl chloride
3. C.nitrous acid
4. D.chloroform
Question 454 marks
The linkage joining two monosaccharide units in a disaccharide is a
1. A.peptide bond
2. B.glycosidic linkage
3. C.phosphodiester bond
4. D.hydrogen bond

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