MCQs on Some Basic Concept of Chemistry for NEET

Chemistry is unarguably a vast subject that comprises several topics and sub-topics. In the case of NEET, the standard of the questions rises ten-fold. Therefore solving only some basic chemistry questions will not be of much help. 

A total of 45 questions are asked from Chemistry in NEET, and it carries 180 marks. With robust preparation and solving various Chemistry MCQs, you can secure full marks in chemistry. Needless to say, that can be done only through an effective study plan and thorough revision.  

In this article, some basic concepts of NEET chemistry notes are discussed following MCQ pattern. 

The following table consists of the chemistry MCQ that came last year, i.e. 2025 NEET. You will get a fair idea of how many questions you can expect from each segment. However, this number can vary; therefore, do not leave any topic. 

Previous Year Chemistry Questions Analysis 

Chemistry MCQ

This NEET chemistry MCQ on some basic concepts of chemistry will help you to understand the level of your preparation. 

1. What changes with time in the first-order reaction?

1. Rate-constant

2. Rate of reaction

3. Half-life 

4. Both b) and c)

2. What is the order of reaction?

1. Zero

2. First

3. Second

4. Third

3. The wavenumber of spectral line in the emission spectrum of hydrogen would be equal to times the Rydberg’s constant if the electron jumps from ____________

1. n=10 to n=1

2. n=3 to n=1

3. n= 9 to n= 1

4. n= 2 to n=1

4. How many neutrons are there in the tritium nucleus?

1. 0

2. 1

3. 2

4. 3

5. Which of these hormones release during stress and stimulate Glycogenolysis in the liver of human beings?

1. Adrenaline

2. Thyroxin

3. Insulin

4. Estradiol

6. The complete hydrolysis of cellulose, forms

1. D-ribose

2. D-glucose

3. L-glucose

4. D-fructose

7. Nucleic acids are the polymers of ________

1. Sugars

2. Bases

3. Nucleosides

4. Nucleotides

8. Which one of these amino acids is basic in nature?

1. Valine

2. Leucine

3. Arginine

4. Tyrosine

9. The number of electrons in the valence cell of the central atom of a molecule is 8. Which one is the molecule?

1. SCl2

2. BeH2

3. BCl3

4. SF6

10. Which one is the least acidic?

1. P-nitrophenol

2. o-cresol

3. Phenol

4. P-chlorophenol

11. Anisole can be made from methyl iodide on sodium phenate. The name of this reaction is 

1. Fittig’s reaction

2. Wurtuz’s reaction

3. Etard’s reaction

4. Williamson’s reaction

12. Write the name of this compound

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1. 2-carboxy-5-hydroxyaniline

2. 3-amino-4-carboxyphenol

3. 2-amino-4-hydroxybenzoic acid

4. 6-amino-4-hydroxybenzoic acid

13. If CH=CH-O-CH2-CH3 reacts with one mole of HI. Which one is formed?

1. Ethanal

2. Iodoethane

3. Ethanol

4. Ethane

14. The number of unidentate ligands in the complex ion is called 

1. EAN

2. Coordination number

3. Oxidation number

4. Primary valency

 15. The number water molecule(s) directly bonded to the metal centre CuSO45H2O is

1. 1

2. 2

3. 3

4. 4  

16. Which one decreases with dilution?

1. Specific conductance

2. Conductance

3. Molar conductance

4. Equivalent conductance

17. Which one is manufactured using Caprolactam?

1. Nylon-6, 6

2. Terylene

3. Nylon-6 

4. Teflon

18. Which one reduces iron oxide in a blast furnace?

1. Silica

2. Carbon monoxide

3. A hot blast of air

4. Carbon

19. What is R in this reaction? 

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1. Sulphanilic acid

2. o-bromo Sulphanilic acid

3. p-bromo Sulphanilic acid

4. Sulphanilamide

20. Which one reduction with lithium aluminium hybrid creates a secondary amine?

1. Acetamide

2. Methyl cyanide

3. Nitroethane

4. Methyl isocyanide

21. Which one of these contains the lowest oxidation number of nitrogen?

1. Nitric oxide

2. Nitrogen dioxide

3. Nitrous oxide

4. Nitrogen trioxide

22. Which statement is correct regarding Fullerene C60?

1. All carbon atoms go through SP2 hybridization.

2. One six-membered ring is fused only with another six-membered ring.

3. It consists of 20 six-membered rings and 12 five-membered ring.

4. A five-membered ring is fused with another 6-membered ring.

23. What is the coordination number of Al in the crystallized form of AlCl3?

1. 6

2. 8

3. 10

4. 4

24. Number of atom/cell unit of bcc is

1. 1

2. 2

3. 4

4. 8

25. If one mole of ammonia and one mole of hydrogen are fused in a closed container to make ammonium chloride gas, what will happen?

1. ∆H>∆u

2. ∆H=∆u

3. ∆H<∆u

4. There is no relationship   

Answers:

These are a few probable chemistry MCQ questions that are gathered together for your convenience. 

Once you learn the significant topics of chemistry, immediately start solving chapter-wise NEET chemistry MCQ from varied sources. The more you revise and solve questions, the better will be your problem-solving ability, especially for the specified time limit. 

Along with the MCQs, also concentrate on dealing with basic Chemistry questions and answers that will help you in clearing conception. Nonetheless, amidst the busy schedule, do not neglect health. Stay hydrated, have a sound sleep and eat healthy. 

Chemistry is a vast branch of science and has played an important role in the branch of science. It is also considered as one of the leading branches of science which coordinates and is used in a very high proportion. While preparing for any examination, chemistry is a subject that should be gone through properly in order to get a good score.

Chemistry is defined as the branch of science which deals with the study of the composition, structure and properties of matter along with the changes which matter undergoes under different conditions and the laws which govern these changes. The chapter "some basic concepts of chemistry'' is an overview of all the laws and properties only. 

The chapter undergoes the complete study of the basics of chemical topics which are necessary to study chemistry. Specific topics which the chapter undergoes and the topics that are needed to be prepared while preparing for NEET are enlisted here:

• Uncertainty in measurement and measurement of significant figures

• Dimensional analysis

• Laws of chemical combination: Under this particular topic, concentrate on the basic laws of chemistry. Those are :

• Law of conservation of mass

• Law of constant composition or definite proportions

• Law of multiple proportions

• Law of reciprocal proportion

• Gay lussac's law of gaseous volume   

• Atomic and molecular masses, mole concept

• Relative atomic masses

• Gram atomic masses

• Molecular mass

• Gram molecular mass

• Formula mass and gram formula mass

• Problems involving mole concept in solutions

• Mole concept

(Note: Remember, some of the terms may sound similar but they have different meanings and different utilities. Keep in mind that you need to recall the definition of all the major terms mentioned here. Though, recalling them is not difficult as these terms form the basics of chemistry and are often used on a regular basis)

•   Percentage composition and an empirical and molecular formula

• Calculation of percentage composition from formula 

• Empirical and molecular formulae

• Relation between empirical and molecular formulae

• Calculation of the empirical formula

• Calculation of molecular formula

• Balancing of a chemical equation

• Stoichiometry and calculations based on stoichiometry

• Stoichiometry of chemical reactions in a general means

• Stoichiometry of reactions in solutions

• Limiting reactant/ reagent

Some of the Simple MCQs based on the Basis of this Chapter

1. The temperature amount of following is

1. 203°F

2. 278K

3. 105°C

4. All are equal 

Ans: 105°C

2. Given the numbers :161cm, 0.161cm, 0.0161cm. The number of significant figures for the three numbers is:

1. 3,4 and 5 respectively

2. 3,3,3 respectively

3. 3,3,4 respectively

4. 3,4,4 respectively

Ans: 3,3,4 respectively.

These are the samples of some simplest questions. Coming to the calculation part of the following chapter

3. How much NaOH is required to neutralize 1500 cm3 of 0.1 N HCl? ( Given, Na = 23)

1. 40g 

2. 4g

3. 6g

4. 60g

Ans:  1500 cm3 of 0.1 N HCl =( 0.1/ 1000)× 1500 = 0.15gram equivalent.

It will neutralize NaOH = 0.15 gram eq.

= 0.15 × 40g= 6g.

So, the final is option c, 6g.

4. Hemoglobin contains 0.33% of iron by weight. The molecular weight of hemoglobin is approximately 67200. The number of iron atoms ( at. wt. of Fe = 56) present in one molecule of hemoglobin is

1. 6

2. 1

3. 4

4. 2

Ans: Fe present in 67200 u = (0.3/100)× 67200 = 222u = 222/56 = 4 atoms. 

So, the final answer to the question is 4 atoms. 

(Note: Remember the atomic mass and atomic number, as provided in the question above, NEET also provides some of the given values, but there are chances where they won't even provide the values. So, it is to memorize them. This further helps to continue with different questions of chemistry apart from this particular chapter also.)

While tackling other questions related to this chapter such as mole concept, limiting reagent, balancing chemical equations, you need to understand the major concepts and processes. 

While preparing for NEET, there are some major points that a student must keep in mind:

• Concepts related to this chapter are logical and fully practice-based. So the more you practice, the better you become. 

• Remember the units and measurement as chemistry has its own dimensions also. 

• Recall the periodic table and concentrate on the basics of charges. This would help a lot while balancing chemical equations. 

• Try to become fast in basic mathematics and calculations. This is because the chapter is highly based on calculations which you will require to tackle many problems.

Preparing for the particular chapter gives you a basic idea of the foundation of chemistry. After preparing the following chapter, one will get accelerated with other chapters also.