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NEET Important Questions from Chemistry: Check Topic Wise Sample Questions with Solutions
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Nikkil Visha

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Chemistry is considered one of the easiest and most scoring subjects in NEET. Some of the scoring sections from NEET Chemistry Syllabus are Chemical Bonding, p-block, Coordination Compounds, etc. Candidates can also expect around 3-4 direct questions in NEET from these topics. 

In this article below, sample topic-wise MCQ questions are provided so that the students can get a better idea of the type of questions asked in the NEET from chemistry. 

Difficulty Level of NEET Chemistry Questions

For a better preparation plan of NEET Chemistry candidates can also divide the syllabus into 3 parts i.e. Physical, Organic, and Inorganic Chemistry. The difficulty level of questions of these 3 parts in the last year was: 

Section/Difficulty Level Number of Easy Questions  Number of Moderate Questions  Number of Difficult Questions 
Organic 8 3 1
Inorganic 11 5 0
Physical 8 5 4

Also Check NEET Chemistry Exam Pattern


Basic Concepts of Chemistry

Questions from Some Basic Concepts of Chemistry

Ques: Which among the following species is not paramagnetic?

  1. Cl-
  2. Ne2+
  3. As+
  4. Be+

Correct Option: A

Solution: Paramagnetism is a form of magnetism where some materials are weakly attracted by the externally applied magnetic fields and thus form an internal and induced magnetic field in the direction of the applied magnetic field. Cl- is diamagnetic.

Ques: Ozone is present in which among the layer of the atmosphere?

  1. Lithosphere
  2. Stratosphere
  3. Hydrosphere
  4. None of the Above

Correct Option; B

Solution: Ozone is present in the stratosphere layer of the atmosphere about 15 to 30 km above the Earth's surface.


Structure of Atom

Questions on Structure of Atom

Ques: Which among the following is the correct chronological order of atomic models?

  1. Rutherford’s
  2. Thomson’s
  3. Bohr’s

Codes:

  1. i, ii, and iii
  2. ii, iii and i
  3. ii, i, and iii
  4. iii, i, and ii

Correct Option: C

Solution: The correct chronological order of atomic models is as follows: Thomson’s, Rutherford’s, and Bohr’s atomic models.

Ques: On which among the following does the orientation of atomic orbitals depend?

  1. Spin quantum number
  2. Azimuthal quantum number
  3. Magnetic quantum number
  4. Principal quantum number

Correct Option: C

Solution: The orientation of atomic orbitals depends on their magnetic quantum number.

Questions on Classification of Elements and Periodicity in Properties

Ques: The element with the atomic number 35 belongs to which among the following blocks?

  1. d- block
  2. f- block
  3. p-block
  4. s-block

Correct Option: C

Solution: The electronic configuration of elements with atomic numbers is 35 and therefore, it belongs to the p-block.

Ques: Which among the following blocks do the representative elements belong to?

  1. s and f-block
  2. s and p-block
  3. s and d-block
  4. p and d-block

Correct Option: B

Solution: Representative elements are those elements where all inner shells are complete but outer shells are incomplete. Therefore, they belong to s and p-block.


Chemical Equilibrium

Questions on Chemical Equilibrium

Ques: Which among the following aqueous solution is the best conductor of electricity?

  1. HCl
  2. CH3COOH
  3. C6H12O6
  4. NH3

Correct Option: A

Solution: HCl, the aqueous solution is the best conductor of electricity.

Ques: When we increase the concentration of reactants in reversible reactions then, what will happen to the equilibrium constant?

  1. Increase
  2. Decrease
  3. Unchanged
  4. Depends on concentration

Correct Option: C

Solution: When we increase the concentration of reactants in a reversible reaction then, the equilibrium constant will remain unchanged.

Must Read: 


Thermodynamics

Questions on Thermodynamics

Ques: Which of the following law of thermodynamics states that at absolute zero, the entropy of a perfect crystal is zero?

  1. First Law
  2. Second Law
  3. Third Law
  4. None of the above

Correct Option: C

Solution: At absolute zero, the entropy of a perfect crystal is zero according to the Third Law of Thermodynamics.

Ques: In which of the given circumstances does entropy decrease?

  1. Crystallization of sucrose from solution
  2. Melting of ice
  3. Rusting of iron
  4. Vaporization of Camphor

Correct Option: A

Solution: During the crystallization of sucrose from the solution, the entropy decreases.


Surface Chemistry

Questions on Surface Chemistry

Ques: An example of the adsorption process is?

  1. Ammonia in contact with water
  2. Anhydrous CaCl2 with water
  3. Silica gel in contact with water vapor
  4. All of the above

Correct Option: C

Solution: An example of an adsorption process is silica gel in contact with water vapor.

Ques: Which among the following is referred to as the process of separating a crystalloid from a colloid by filtration?

  1. Dialysis
  2. Petization
  3. Coagulation
  4. Emulsification

Correct Option: A

Solution: Dialysis is known as the process of separating a crystalloid from a colloid by filtration.

Questions on General Principles and Processes of Isolation of Element

Ques: Which among the following is the IUPAC name of Cryolite?

  1. Potassium hexafluoroaluminate
  2. Basic magnesium carbonate
  3. Calcium fluoride
  4. Sodium hexafluoroaluminate

Correct Option: D

Solution: Cryolite is an ore of sodium and its IUPAC name is Sodium hexafluoroaluminate.

Ques: Which among the following does the chemical process in the production of steel from haematite ore involve?

  1. Reduction
  2. Oxidation
  3. Oxidation followed by Reduction
  4. Reduction followed by Oxidation

Correct Option: C

Solution: The chemical processes in the production of steel from the haematite ore involve oxidation of C to Co2 and then reduction process.


D & F Block Elements

Questions on D and F Block Elements

Ques: Why do Zinc and mercury don’t show variable valency like d-block elements?

  1. They are soft
  2. Their d- shells are incomplete
  3. Their d-shells are complete
  4. They have only 2 electrons in the outermost subshell

Correct Option: C

Solution: The main reason why zinc and mercury don’t show any variable valency unlike d-block elements is that their d-shells are complete.

Ques: Why does silver nitrate produce a black stain on the skin?

  1. It is a strong reducing agent
  2. Its corrosive action
  3. Its reduction to metallic silver
  4. Formation of complex compound

Correct option: C

Solution: Silver nitrate produces a black stain on the skin because of its reduction to metallic silver.


Coordination Compounds

Questions on Coordination Compounds

Ques: Which among the following has magnesium?

  1. Vitamin B12
  2. Haemocyanin
  3. Chlorophyll
  4. Carbonic anhydrate

Correct Option: A

Solution: Chlorophyll is the magnesium porphyrin complex and it has magnesium at the center of the modified porphyrin ring septeon.

Ques: Trunbull’s blue is a compound of which among the following?

  1. Ferrous cyanide
  2. Ferricyanide
  3. Ferrous ferricyanide
  4. Fe3(Fe(CN)6)4

Correct Option: C

Solution: Trunbull’s blue is a compound of Ferrous Ferricyanide.


Haloalkanes & Haloarenes

Questions on Haloalkanes and Haloarenes

Ques: Which among the following can be prepared by using a Fitting reaction?

  1. Acetophenone
  2. Diphenyl
  3. Toluene
  4. Chlorobenzene

Correct Option: B

Solution: Diphenyl can be prepared by using the Fitting reaction.

Ques: The Grignard reagent is made by reacting magnesium with which among the following?

  1. Ethyl iodide
  2. Ethyl alcohol
  3. Diethyl ether
  4. Methylamine

Correct Option: A

Solution: The Grignard reagent is made by reacting magnesium with Ethyl iodide.


Alcohol Phenol and Ether

Questions on Alcohol Phenol and Ether

Solution: The dehydration of alcohol is an example of which among the following reaction?

  1. Addition reaction
  2. Substitution reaction
  3. Elimination reaction
  4. Redox reaction

Correct Option: C

Solution: An elimination reaction example is dehydration of alcohol.

Ques: Which among the following is formed when tertiary butyl alcohol is passed over heated copper at 300 degrees Celsius?

  1. Butanol
  2. 1-butene
  3. 2-methylpropene
  4. Secondary butyl alcohol

Correct Option: C

Solution: When tertiary butyl alcohol is passed over heated copper at 300 degrees Celsius, then 2-methylpropene is formed.

Must Read:

Questions on Aldehydes, Ketones, and Carboxylic Acids:

Ques: Which among the following reaction is called the oxidation of toluene to benzaldehyde by chromyl chloride?

  1. Wurtz reaction
  2. Cannizzaro’s reaction
  3. Reimer-Tiemann reaction
  4. Etard reaction

Correct Option; Etard reaction

Solution: Etard reaction is referred to as the oxidation of toluene to benzaldehyde by chromyl chloride.

Ques: Which among the following is an example of the addition of HCN to carbonyl compounds?

  1. Free radical addition
  2. Electrophilic addition
  3. Nucleophilic addition
  4. Electromeric addition

Correct option: C

Solution: Nucleophilic addition example is the addition of HCN to carbonyl compounds.

Questions on Organic Compounds Containing Nitrogen:

Ques: When an aldehyde reacts with a primary amine, it forms which among the following?

  1. Carboxylic acid
  2. Schiff’s base
  3. Ketone
  4. Aromatic acid

Correct Option: Schiff’s base

Solution: The Schiff’s base is formed when aldehyde reacts with a primary amine. It is used as pigments, catalysts, polymer stabilizers, and dyes, etc.

Ques: Which among the following is more basic than aniline?

  1. Triphenylamine
  2. Diphenylamine
  3. Benzylamine
  4. p-Nitroaniline

Correct Option: C

Solution: Benzylamine compound is more basic when compared to aniline.


Biomolecules

Questions on Biomolecules

Ques: Which among the following is a reducing sugar?

  1. Gluconic acid
  2. Sucrose
  3. Galactose
  4. Raffinose

Correct Option: Galactose

Solution: Reducing sugar is defined as any sugar that is capable of acting as a reducing agent due to the presence of free aldehyde or ketone group. All monosaccharides such as glucose, fructose, ribose are reducing sugars.

Ques: Who among the following coined the term enzyme?

  1. Wilhelm Kuhne
  2. Pasteur
  3. Urey miller
  4. Buchner

Correct option: A

Solution: Wilhelm Kuhne coined the term enzyme in 1877.

Questions on Chemistry in Everyday Life

Ques: What is the reason for not using fatty acid containing less than eight carbon atoms in the preparation of a soap?

  1. Insoluble in water
  2. Forms emulsion with grease
  3. Forms colloidal solution with water
  4. Doesn’t form an emulsion with grease

Correct Option: D

Solution: Soap possesses a carboxylic acid chain through which hydrocarbons and sodium-potassium ions are attached and therefore, it has a tadpole-like structure. Though ions dissolve in water and non-ionic carbon chain dissolves in oil to form an emulsion. It is required that a non-ionic chain must have more than 8 carbon atoms to form an emulsion.

Ques: What is the surface tension of water when soap and detergent are added to water?

  1. Increased by soap and detergent
  2. Reduced by soap and detergent
  3. Reduced by detergent and increased by soap
  4. Reduced by soap and increased by detergent

Correct Option: B

Solution: When soap and detergent are both added to the water, then the ionic part of them attracts grease and repels water molecules. Therefore, hydrogen bonds that hold water molecules become weak and the surface tension of soap and detergent is reduced.

Ques: What is the main cause of acidity in the stomach?

  1. The release of extra gastric acids decrease pH level
  2. Increase in pH level in the stomach
  3. Indigestion and pain in the large intestine
  4. The release of extra bile juice increases alkaline

Correct Option: A

Solution: The release of extra gastric acids decrease pH level and causes acidity in the stomach.

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