Chemistry plays a crucial role in the General Science section of the Railway RRB NTPC 2026 Exam. Every year, a good number of questions are asked from basic Chemistry concepts that test your understanding of everyday science rather than deep theoretical knowledge. Topics like elements & compounds, acids and bases, metals and non-metals, chemical reactions, states of matter, and daily life chemistry are frequently repeated in the exam.
Download Top RRB NTPC Chemistry Questions PDF
A free PDF comprising the top RRB NTPC chemistry questions has been provided below. Download it and understand the question type and level of difficulty:
Practice the Most Repeated Questions for RRB NTPC Chemistry
Given below are some of the most repeated chemistry questions for the RRB NTPC Exam. Attempt them live and check your score as per the real exam marking scheme.
Q.1 Which of the following gases is evolved when zinc reacts with dilute hydrochloric acid?
Ans 1. Carbon dioxide
2. Hydrogen
3. Oxygen
4. Nitrogen
Correct Answer: 2
Q.2 Which property of acids is responsible for turning blue litmus paper red?
Ans 1. Presence of OH⁻ ions
2. Presence of H⁺ ions
3. Formation of salts
4. Neutralisation reaction
Correct Answer: 2
Q.3 Which of the following metals can be cut easily with a knife?
Ans 1. Iron
2. Copper
3. Sodium
4. Aluminium
Correct Answer: 3
Q.4 The chemical formula of washing soda is:
Ans 1. Na₂CO₃
2. NaHCO₃
3. Na₂CO₃·10H₂O
4. CaCO₃
Correct Answer: 3
Q.5 Which of the following is a physical change?
Ans 1. Rusting of iron
2. Burning of coal
3. Melting of ice
4. Cooking of food
Correct Answer: 3
Q.6 What type of reaction takes place when calcium carbonate is heated?
Ans 1. Combination reaction
2. Displacement reaction
3. Decomposition reaction
4. Redox reaction
Correct Answer: 3
Q.7 Which gas is produced during the fermentation of sugar?
Ans 1. Oxygen
2. Carbon dioxide
3. Hydrogen
4. Nitrogen
Correct Answer: 2
Q.8 Which of the following substances shows sublimation?
Ans 1. Common salt
2. Sugar
3. Ammonium chloride
4. Copper sulphate
Correct Answer: 3
Q.9 The pH value of a neutral solution is:
Ans 1. 0
2. 5
3. 7
4. 14
Correct Answer: 3
Q.10 Which element is used as a catalyst in the Haber process?
Ans 1. Copper
2. Iron
3. Aluminium
4. Zinc
Correct Answer: 2
Q.11 Which of the following is an example of oxidation?
Ans 1. Loss of oxygen
2. Gain of hydrogen
3. Loss of electrons
4. Gain of electrons
Correct Answer: 3
Q.12 Which metal is extracted from its ore by electrolytic reduction?
Ans 1. Iron
2. Copper
3. Aluminium
4. Zinc
Correct Answer: 3
Q.13 What is the main constituent of natural gas?
Ans 1. Ethane
2. Methane
3. Propane
4. Butane
Correct Answer: 2
Q.14 Which of the following solutions will conduct electricity?
Ans 1. Sugar solution
2. Distilled water
3. Salt solution
4. Kerosene
Correct Answer: 3
Q.15 Which acid is present in vinegar?
Ans 1. Citric acid
2. Lactic acid
3. Acetic acid
4. Formic acid
Correct Answer: 3
Q.16 What is the rusting of iron chemically called?
Ans 1. Reduction
2. Oxidation
3. Neutralisation
4. Displacement
Correct Answer: 2
Q.17 Which of the following is a strong base?
Ans 1. Ammonium hydroxide
2. Sodium hydroxide
3. Calcium carbonate
4. Magnesium oxide
Correct Answer: 2
Q.18 Which non-metal is a good conductor of electricity?
Ans 1. Sulphur
2. Phosphorus
3. Graphite
4. Oxygen
Correct Answer: 3
Q.19 Which of the following salts is used in photography?
Ans 1. Sodium chloride
2. Silver bromide
3. Calcium sulphate
4. Potassium nitrate
Correct Answer: 2
Q.20 What is the valency of oxygen?
Ans 1. 1
2. 2
3. 3
4. 4
Correct Answer: 2
Q.21 Which gas is responsible for acid rain?
Ans 1. Oxygen
2. Nitrogen
3. Sulphur dioxide
4. Hydrogen
Correct Answer: 3
Q.22 Which of the following ores is concentrated by froth flotation method?
Ans 1. Bauxite
2. Hematite
3. Zinc blende
4. Calamine
Correct Answer: 3
Q.23 Which substance is used to dry ammonia gas?
Ans 1. Concentrated sulphuric acid
2. Quicklime
3. Anhydrous calcium chloride
4. Phosphorus pentoxide
Correct Answer: 2
Q.24 What is the chemical name of bleaching powder?
Ans 1. Calcium chloride
2. Calcium hypochlorite
3. Calcium hydroxide
4. Calcium oxide
Correct Answer: 2
Q.25 Which metal is the best conductor of electricity?
Ans 1. Copper
2. Aluminium
3. Silver
4. Gold
Correct Answer: 3
Q.26 Which of the following is an exothermic reaction?
Ans 1. Decomposition of calcium carbonate
2. Photosynthesis
3. Burning of magnesium
4. Electrolysis of water
Correct Answer: 3
Q.27 Which of the following is an alkali?
Ans 1. Sodium hydroxide
2. Copper sulphate
3. Hydrochloric acid
4. Calcium carbonate
Correct Answer: 1
Q.28 Which gas turns limewater milky?
Ans 1. Oxygen
2. Carbon dioxide
3. Hydrogen
4. Nitrogen
Correct Answer: 2
Q.29 What type of bond is present in sodium chloride?
Ans 1. Covalent bond
2. Metallic bond
3. Ionic bond
4. Hydrogen bond
Correct Answer: 3
Q.30 Which of the following metals does not react with water at room temperature?
Ans 1. Sodium
2. Calcium
3. Iron
4. Potassium
Correct Answer: 3
What is the RRB NTPC Exam Pattern?
The RRB NTPC Exam Pattern for CBT 1 is divided into sections like Mathematics, General Intelligence and Reasoning and General Awareness. The details are tabulated below:
- Duration: 90 minutes
- +1 for every correct answer
- -1/3 for every wrong answer
- Total marks: 100
| Section | Question | Marks |
| Mathematics | 30 | 30 |
| General Intelligence and Reasoning | 30 | 30 |
| General Awareness | 40 | 40 |
| Total | 100 | 100 |
RRB NTPC Exam Pattern for CBT 2
The CBT 2 exam pattern consists of 120 questions in total. Each question carries one mark. Negative marking of -1/3 mark also applies for every incorrect answer. Check out the details given below:
| Section | Questions | Marks |
| Mathematics | 35 | 35 |
| General Intelligence and Reasoning | 35 | 35 |
| General Awareness | 50 | 50 |
| Total | 120 | 120 |
FAQs
In the RRB NTPC exam, Chemistry questions are asked under the General Science section, usually 5–8 questions, depending on the paper level.
Important topics include Acids, Bases & Salts, Metals & Non-metals, Chemical Reactions, Elements & Compounds, States of Matter, and Chemistry in Everyday Life. These topics are frequently repeated in the exam.
Yes, NCERT Chemistry books (Class 6–10) are more than sufficient for RRB NTPC. Most questions are directly based on NCERT-level concepts and definitions.
No, Chemistry in RRB NTPC is easy and scoring, even for non-science students. Questions are straightforward and related to daily life examples, making them easy to understand with regular practice.
Focus on basic concepts, revise important formulas and reactions, practice previous year questions, and attempt mock tests regularly. Consistent revision can help you score full marks in this section.
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