Category: NEET Chemistry Objective Questions

NEET  Chemistry is the very imporatant paper in the Medical Entrance EXAM. So these NEET Chemistry MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Chemistry objective questions on air pollution. NEET Chemistry Aldehydes, Ketones and Carboxylic Acids Multiple Choice Questions

MCQs on Aldehydes, Ketones and Carboxylic Acids :

1. A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives
(A) benzyl alcohol + sodium formate
(B) sodium benzoate + methanol
(C) benzyl alcohol + methanol
(D) sodium benzoate + sodium formate

Answer

Answer: (a)

2. Which of the following has the most acidic hydrogen?
(A) hexane-2,4-dione
(B) hexane-2,3-dione
(C) hexane-2,5-dione
(D) hexane-3-one

Answer

Answer: (a)

3. A new C-C bond formation is possible in
(A) cannizzaro reaction
(B) friedel crafts reaction
(C) clemmensen reduction
(D) reimer tiemann reaction

Answer

Answer: (b,d)

4. Under Wolff-Kishner reduction conditions, the conversions which may be brought about are
(A) cyclohexanone into cyclohexane
(B) benzaldehyde into benzyl alcohol
(C) cyclohexanone into cyclohexanol
(D) benzophenone into diphenylmethane

Answer

Answer: (a,d)

5. The formation of cyanohydrin from a ketone is an example of
(A) electrophilic addition
(B) nucleophilic addition
(C) nucleophilic substitution
(D) electrophilic substitution

Answer

Answer: (b)

6. Benzoic acid reacts with conc.HNO₃ and conc.H₂SO₄ to give
(A) o-nitrobenzoic acid
(B) p-nitrobenzoic acid
(C) m-nitrobenzoic acid
(D) o,p-dinitrobenzoic acid

Answer

Answer: (c)

7. An inorganic compound producing an organic compound on heating is
(A) ammonium cyanate
(B) soda lime
(C) sodamide
(D) potassium cyanide

Answer

Answer: (a)

8. The reaction of ethyl formate with an excess of CH₃MgI followed by hydrolysis gives
(A) ethanol
(B) n-propyl alcohol
(C) propanal
(D) isopropyl alcohol

Answer

Answer: (d)

9. Formic acid and acetic acid are distinguished by reaction with
(A) sodium ethoxide
(B) sodium
(C) HgCl₂
(D) 2,4-dinitrophenylhydrazine

Answer

Answer: (c)

10. Heating a mixture of sodium benzoate and soda lime gives
(A) calcium benzoate
(B) benzene
(C) sodium benzoate
(D) methane

Answer

Answer: (b)

NEET  Chemistry is the very imporatant paper in the Medical Entrance EXAM. So these NEET Chemistry MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Chemistry objective questions on air pollution. NEET Chemistry Hydrocarbons Multiple Choice Questions

MCQs on Hydrocarbons :

1. Find the correct order of increasing acidity

Answer

Answer: (d)

2. Identify Z in the given reaction:

Answer

Answer: (d)

3. The product obtained on heating 2-Bromopentane with potassium ethoxide in ethanol is
(A) 1-pentene
(B) 2-cis-pentene
(C) trans-2-pentene
(D) 2-ethoxy pentane

Answer

Answer: (c)

4. Choose the process by which liquid hydrocarbons can be converted to gaseous hydrocarbons
(A) hydrolysis
(B) oxidation
(C) cracking
(D) distillation under reduced pressure

Answer

Answer: (c)

5. Which one of the following halide can be used in the Friedel-Crafts reaction?
(A) Isopropyl chloride
(B) Bromobenzene
(C) Chlorobenzene
(D) Chloroethene

Answer

Answer: (a)

6. Which one of the following compound forms salt on reaction with NaNH₂?
(A) C₂H₂
(B) C₂H₆
(C) C₆H₆
(D) C₂H₄

Answer

Answer: (a)

7. Which among the following reagent can be used to distinguish between CH₂BrCH=CH₂ from CH₃CH=CHBr?
(A) Br₂/CCl₄
(B) cold KMnO₄
(C) AgNO₃/C₂H₅OH
(D) Ag(NH₃)₂OH

Answer

Answer: (c)

8. Isopropyl iodide is formed after reaction of propene with HI, this is due to
(A) more stable free radical
(B) homolysis
(C) more stable carbanion
(D) more stable carbocation

Answer

Answer: (d)

9. C₆H₅CHO is formed when C₆H₆ is treated with CO and HCl in the presence of anhydrous AlCl₃. Name of the reaction is:
(A) Friedel crafts reaction
(B) Gattermann Koch reaction
(C) Rosenmund reaction
(D) Stephen reaction

Answer

Answer: (b)

10. A compound having a bond angle 180° is
(A) alkyne
(B) alkane
(C) alkene
(D) cycloalkane

Answer

Answer: (a)

NEET  Chemistry is the very imporatant paper in the Medical Entrance EXAM. So these NEET Chemistry MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Chemistry objective questions on air pollution. NEET Chemistry Alkyne Multiple Choice Questions

MCQs on Alkyne :

1. Ethyne and Ethane can be separated from a mixture by passing it through
(A) Pyrogallol
(B) Charcoal powder
(C) Concentrated H₂SO₄
(D) Ammonical Cu₂Cl₂

Answer

Answer: (d)

2. 1-butyne and 2-butyne can be identified by using which of the following reagents?
(A) O₂
(B) Br₂
(C) NaNH₂
(D) HCl

Answer

Answer: (c)

3. Which of the following is used for welding?
(A) CH₄
(B) C₂H₂
(C) C₂H₆
(D) C₂H₄

Answer

Answer: (b)

4. The product formed in the reaction of propyne with dilute H₂SO₄ and HgSO₄ is
(A) Propyl hydrogen sulphate
(B) Propanone
(C) Propanal
(D) Propanol

Answer

Answer: (b)

5. Polymerisation product of propyne is
(A) Benzene
(B) Ethyl benzene
(C) Propyl benzene
(D) Mesitylene

Answer

Answer: (d)

6. The product formed in the reaction of ethyne with dilute H₂SO₄ and Hg²⁺ is
(A) Ethyl hydrogen sulphate
(B) Methoxymethane
(C) Ethanal
(D) Ethanol

Answer

Answer: (c)

7. In the ozonolysis reaction, acetylene forms
(A) Formaldehyde
(B) Glycol
(C) Glyoxal, formic acid
(D) None of the above

Answer

Answer: (c)

8. Acetylene is oxidised by KMnO₄ to form
(A) Acetic acid
(B) Ethyl alcohol
(C) Ethylene glycol
(D) Oxalic acid

Answer

Answer: (d)

9. Find Z in the following reaction
(A) Ethyl bromide
(B) Ethylene bromide
(C) Ethylidene bromide
(D) Ethanol

Answer

Answer: (a)

10. When ethyne is passed through a red hot tube, _______ is formed
(A) Cyclohexane
(B) Neoprene
(C) Benzene
(D) Ethane

Answer

Answer: (c)

NEET  Chemistry is the very imporatant paper in the Medical Entrance EXAM. So these NEET Chemistry MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Chemistry objective questions on air pollution. NEET Chemistry Hydrogen Peroxide Multiple Choice Questions

MCQs on Hydrogen Peroxide :

1. The structure of hydrogen peroxide is
(A) Planar
(B) Spherical
(C) Linear
(D) Non-planar

Answer

Answer: (d)

2. Fenton’s reagent is 
(A) Zn + HCl
(B) Sn + HCl
(C) FeSO₄ + H₂O₂
(D) None

Answer

Answer: (c)

3. Hydrogen peroxide is
(A) oxidising agent
(B) reducing agent
(C) oxidising as well as reducing
(D) None

Answer

Answer: (c)

4. In the disproportionation Hydrogen peroxide, forming H₂O and O₂ its equivalent weight is 
(A) 8.5
(B) 17
(C) 34
(D) 68

Answer

Answer: (c)

5. The gram equivalent weight of H₂O₂ as a reductant is 
(A) 34
(B) 68
(C) 18
(D) 17

Answer

Answer: (d)

6. H₂O₂ cannot oxidise
(A) Na₂SO₃
(B) O₃
(C) PbS
(D) KI/HCl

Answer

Answer: (b)

7. Which of the following contains peroxide linkage?
(A) SO₂
(B) MnO₂
(C) NO₂
(D) BaO₂

Answer

Answer: (d)

8. Which of the following statement is false
(A) H₂O₂ is oxidising
(B) H₂O₂ is reducing
(C) H₂O₂ is basic
(D) H₂O₂ is acidic

Answer

Answer: (c)

9. Which of the following gives hydrogen peroxide on electrolysis?
(A) H₂SO₄
(B) H₂O
(C) HCl
(D) None of the above

Answer

Answer: (a)

10. Acidified potassium permanganate is dropped over sodium peroxide taken in a round bottom flask at room temperature, the vigorous reaction takes place to produce
(A) hydrogen peroxide
(B) a mixture of hydrogen and oxygen
(C) a colourless gas hydrogen
(D) a colourless gas dioxygen

Answer

Answer: (d)

NEET  Chemistry is the very imporatant paper in the Medical Entrance EXAM. So these NEET Chemistry MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Chemistry objective questions on air pollution. NEET Chemistry Redox Reaction and Method for Balancing Redox Reaction Multiple Choice Questions

MCQs on Redox Reaction and Method for Balancing Redox Reaction :

1. Which of the following represents a redox reaction?
(A) NaOH + HCl → NaCl + H₂O
(B) BaCl₂ + H₂SO₄ → BaSO₄ + 2HCl
(C) CuSO₄ + 2H₂O → Cu(OH)₂ + H₂SO₃
(D) Zn + 2HCl → ZnCl₂ + H₂

Answer

Answer: (d)

2. Which reaction involves neither oxidation nor reduction?
(A) CrO₄^2- -→ Cr₂O₇^2-
(B) Cr → CrCl₃
(C) Na → Na⁺
(D) 2S₂O₃^2- → S₄O₆^2-

Answer

Answer: (a)

3. Zn gives H₂ gas with H₂SO₄ and HCl but not with HNO₃ because
(A) Zn acts as an oxidising agent when it reacts with HNO₃
(B) HNO₃ is a weaker acid than H₂SO₄ and HCl
(C) In electrochemical series, Zn is above hydrogen
(D) NO₃^– is reduced in preference to hydronium ion

Answer

Answer: (d)

4. A compound of Xe and F is found to have 53.5% of Xe. What is the oxidation number of Xe in this compound?
(A) -4
(B) 0
(C) +4
(D) +6

Answer

Answer: (d)

5. A solution contains Fe²⁺, Fe³⁺ and I^– ions. This solution was treated with iodine at 35^oC. E^o for Fe³⁺/Fe²⁺ is 0.77V and E^o for I₂/2I^– = 0.536V. The favourable redox reaction is
(A) I₂ will be reduced to I^–
(B) there will be no redox reaction
(C) I^– will be oxidised to I₂
(D) Fe²⁺ will be oxidised to Fe³⁺

Answer

Answer: (c)

6. One mole of N₂H₄ loses 10 moles of electrons to form a new compound y. Assuming that all nitrogen appears in the new compound, what is the oxidation state of nitrogen in y.
(A) -1
(B) -3
(C) +3
(D) +5

Answer

Answer: (c)

7. The equivalent mass of oxidising agent in the following reaction is

SO₂ + 2H₂S → 3S + 2H₂O
(A) 32
(B) 64
(C) 16
(D) 8

Answer

Answer: (c)

8. In the reaction

3Br₂ + 6CO₃^2- + 3H₂O → 5Br^– + BrO₃^– + 6HCO₃^–
(A) bromine is oxidised and carbonate is reduced
(B) bromine is reduced and water is oxidised
(C) bromine is neither reduced nor oxidised
(D) bromine is both reduced and oxidised

Answer

Answer: (d)

9. Which of the following cannot function as an oxidising agent?
(A) I^–
(B) Si(s)
(C) NO₃^–(aq)
(D) Cr₂O₇^2-

Answer

Answer: (a)

10. The oxidation number of Pt in [Pt(C₂H₄)Cl₃]^– is
(A) +1
(B) +2
(C) +3
(D) +4

Answer

Answer: (b)

NEET  Chemistry is the very imporatant paper in the Medical Entrance EXAM. So these NEET Chemistry MCQs with Answers for all Concepts as per the new syllabus. Practice daily with these NEET Chemistry objective questions on air pollution. NEET Chemistry Solid State Multiple Choice Questions

MCQs on Solid State :

1. How many unit cells are divided equally in a face-centred cubic lattice?
(A) 2
(B) 4
(C) 6
(D) 8

Answer

Answer: (c)

2. A crystalline solid:
(A) changes abruptly from solid to liquid when heated.
(B) has no definite melting point.
(C) undergoes deformation of its geometry easily
(D) has irregular 3-dimensional arrangements.

Answer

Answer: (a)

3. In a simple cubic, body-centred cubic and face-centred cubic structure, the ratio of the number of atoms present is respectively
(A) 8:1:6
(B) 1:2:4
(C) 4:2:1
(D) 4:2:3

Answer

Answer: (b)

4. Na and Mg crystallize in crystals of bcc and fcc form respectively and then the amount of Na and Mg atoms present in their respective crystal unit cells is:
(A) 4 and 2
(B) 9 and 14
(C) 14 and 9
(D) 2 and 4

Answer

Answer: (d)

5. Ferrous oxide has a cubic structure and each unit cell edge is 5.0A^o. Assuming the oxide density is 4.0g / cm³, the amount of Fe²⁺ and O^2- ions in each unit cell will then be
(A) four Fe²⁺ and four O^2-
(B) two Fe²⁺ and four O^2-
(C) four Fe²⁺ and two O^2-
(D) three Fe²⁺ and three O^2-

Answer

Answer: (a)

6. Each of the following solids shows, the Frenkel defect except
(A) ZnS
(B) AgBr
(C) AgI
(D) KCl

Answer

Answer: (d)

7. Schottky defect in a crystal is observed when
(A) The ion leaves its normal position and occupies an interstitial location
(B) the unequal number of cation and anions are missing from the lattice
(C) the density of the crystal increases.
(D) an equal number of cations and anions are missing from the lattice.

Answer

Answer: (d)

8. Copper crystalline in FCC with a unit cell length of 361pm. What is the radius of a copper atom?
(A) 128pm
(B) 157pm
(C) 181pm
(D) 108pm

Answer

Answer: (a)

9. The total no of voids in 0.5 mol of a compound forming hexagonal close-packed structure are:
(A) 6.022 × 10²³
(B) 3.011 × 10²³
(C) 9.033 × 10²³
(D) 4.516 × 10²³

Answer

Answer: (c)

10. For the orthorhombic system, axial ratios are a ≠ b ≠ c and the axial angles are:
(A) α = β = γ ≠ 90^o
(B) α ≠ β ≠ γ ≠ 90^o
(C) α = β = γ = 90^o
(D) α ≠ β ≠ γ = 90^o

Answer

Answer: (c)