Chemistry Questions for RRB ALP: Practice Top Repeated Questions Now

If you are preparing for the RRB ALP exam, you simply cannot ignore General Science. Out of the 20 marks for science in CBT 1, Chemistry carries a heavy weightage of 5 to 7 questions. The best part is that these questions are direct and basic, making them highly scoring. You don’t need to learn tough equations to get these free marks. To make things simple, we have provided exam-level chemistry questions for RRB ALP with detailed solutions below. Solving these, along with attempting our free topic tests, will definitely help you prepare for this topic much more easily and quickly.

What to Study in Chemistry for RRB ALP?

You do not need to read thick science books to pass this section. The exam only wants to check your basic general knowledge about the things we use in daily life. You can divide the whole syllabus into four simple parts:

• Acids, Bases, and Salts: This is the easiest part. Just learn the pH values of common things like blood, pure water, and lemon. Read about the acids found in daily items (like citric acid in lemon or lactic acid in milk).
• Everyday Chemistry: Focus on the common names and chemical names of daily items. For example, what is the chemical name of baking soda, washing soda, or bleaching powder?
• Metals and Non-Metals: Read about the special features of metals. Which is the lightest metal? Which metal is liquid at room temperature? Also, learn the names of important ores (like Bauxite for Aluminium).
• The Periodic Table: Do not memorize the whole table! Just read the basics: who created the modern periodic table, what are noble gases, and the atomic numbers of the first 20 elements.

If you just focus on these basic topics, Chemistry will become your scoring subject.

Important Chemistry Questions for RRB ALP

Now you have understood what kind of topics can be asked in the exam, and you have to study for the exam. But just preparing or reading topics is not enough. If you really want to score good marks in this exam, then you should practice exam-level or repeated questions. Doing this will help you to prepare for the exam more easily and quickly.

Q1. Which of the following metals is liquid at room temperature?

(A) Iron
(B) Zinc
(C) Mercury
(D) Aluminum

Answer: (C) Mercury

Explanation:
Mercury is the only common metal that remains liquid at room temperature. It is commonly used in thermometers and some scientific instruments.

Q2. What is the chemical name of common salt used in food?

(A) Sodium Carbonate
(B) Sodium Chloride
(C) Potassium Chloride
(D) Sodium Bicarbonate

Answer: (B) Sodium Chloride

Explanation:
The chemical formula of common salt is NaCl, which stands for Sodium Chloride.

Q3. What is the pH value of pure water?

(A) 6
(B) 7
(C) 8
(D) 14

Answer: (B) 7

Explanation:
Pure water is neutral. On the pH scale (0–14), a pH value of 7 represents neutrality.

Q4. Which acid is present in lemon or orange?

(A) Lactic acid
(B) Acetic acid
(C) Citric acid
(D) Formic acid

Answer: (C) Citric acid

Explanation:
Citrus fruits such as lemons and oranges contain citric acid. Lactic acid is present in curd.

Q5. Which gas is commonly known as “Laughing Gas”?

(A) Nitric oxide
(B) Nitrogen dioxide
(C) Nitrous oxide
(D) Ammonia

Answer: (C) Nitrous oxide

Explanation:
Nitrous oxide (N₂O) is called laughing gas because inhaling it produces a feeling of relaxation and laughter. It is used as a mild anesthetic in dentistry.

Q6. Which of the following is the hardest naturally occurring substance?

(A) Gold
(B) Iron
(C) Diamond
(D) Graphite

Answer: (C) Diamond

Explanation:
Diamond is the hardest natural substance and is composed entirely of carbon atoms arranged in a strong crystal structure.

Q7. Which highly reactive metal is stored under kerosene oil?

(A) Sodium
(B) Calcium
(C) Magnesium
(D) Copper

Answer: (A) Sodium

Explanation:
Sodium is very reactive and reacts violently with air and water. Therefore, it is stored under kerosene to prevent contact with air or moisture.

Q8. Bauxite is an ore of which metal?

(A) Iron
(B) Copper
(C) Gold
(D) Aluminium

Answer: (D) Aluminium

Explanation:
Bauxite is the main ore from which aluminium is extracted.

Q9. Which gas is filled in electric bulbs to prevent the filament from burning?

(A) Oxygen
(B) Hydrogen
(C) Argon
(D) Carbon dioxide

Answer: (C) Argon

Explanation:
Argon is a noble gas and does not react with the hot tungsten filament in bulbs, which increases the bulb’s life.

Q10. What is the chemical name of Baking Soda?

(A) Sodium Carbonate
(B) Sodium Bicarbonate
(C) Calcium Carbonate
(D) Sodium Hydroxide

Answer: (B) Sodium Bicarbonate

Explanation:
Baking soda is Sodium Bicarbonate (NaHCO₃). Washing soda is Sodium Carbonate.

5 Simple Tips to Prepare for Chemistry for RRB ALP

You do not have the time to read thick science books, and honestly, you do not need to. Here are 5 smart and easy tips to cover this topic quickly:

• Memorize the Common Names List: Railway exams love asking about the daily names of chemicals. Make a small list of 10-15 things (like Baking soda, Washing soda, Bleaching powder, Plaster of Paris) with their chemical names and stick it on your wall.
• Learn the pH Chart: Just memorize the pH values of 5 to 6 common things: Blood (7.4), Pure water (7), Lemon juice (around 2.5), and Milk (6.5).
• Do Not Mug Up Big Equations: Stop trying to balance tough chemical equations. The ALP exam rarely asks you to balance equations. Focus on direct facts instead.
• Use 10th Standard Books: Do not buy heavy competitive exam books for Science. A simple 10th-level NCERT summary book or Lucent’s GK is more than enough for this exam.
• Practice Previous Year Papers: Railway exam questions mostly match with each other’s science questions. Solve the previous year’s chemistry questions of RRB Group D, NTPC, and ALP. You will see the exact same questions repeating!

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