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Are you preparing for the RRB Group D exam<\/a>?<\/strong> It is a huge opportunity to get a secure government job in Indian Railways. But to get selected, you need to score high marks in the Computer-Based Test (CBT). One section that troubles almost every student is General Science. And within Science, Chemistry is often the scariest part. Students get confused by complex formulas, atomic numbers, and chemical reactions, but they don’t know that they don’t need to be a scientist to clear this exam. RRB asks very basic Chemistry questions for RRB Group D exam that are mainly from Class 9 and 10 NCERT books. They focus on things we see in daily life\u2014like why lemons are sour or what is inside a battery. To help you prepare without fear, we have compiled the most repeated Chemistry questions into a free PDF. You can download it from this blog.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n In the General Science section (25 questions), Chemistry plays a massive role.<\/p>\n\n\n\n <\/p>\n\n\n\n We have prepared a comprehensive PDF containing exam-level questions. We have chosen questions that cover the unique mix of Periodic Table, Acids & Bases, and Metals that the RRB Group D is famous for. Download it, save it, and practice these questions to build your confidence.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p>\n\n\n\n Q1. Which gas is predominantly responsible for the “Greenhouse Effect” on Earth?<\/strong><\/p>\n\n\n\n (a) Oxygen Answer:<\/strong> (c) Carbon Dioxide<\/p>\n\n\n\n Logic:<\/strong> Q2. What is the chemical formula of ‘Baking Soda’?<\/strong><\/p>\n\n\n\n (a) Na\u2082CO\u2083 Answer:<\/strong> (b) NaHCO\u2083<\/p>\n\n\n\n Logic:<\/strong> Q3. In the Modern Periodic Table, elements are arranged according to their:<\/strong><\/p>\n\n\n\n (a) Atomic Mass Answer:<\/strong> (b) Atomic Number<\/p>\n\n\n\n Logic:<\/strong> Q4. Which metal is liquid at room temperature?<\/strong><\/p>\n\n\n\n (a) Sodium Answer:<\/strong> (c) Mercury<\/p>\n\n\n\n Logic:<\/strong> Q5. What is the pH value of pure water?<\/strong><\/p>\n\n\n\n (a) 0 Answer:<\/strong> (b) 7<\/p>\n\n\n\n Logic:<\/strong> Q6. Which acid is found in ‘Ant Stings’?<\/strong><\/p>\n\n\n\n (a) Acetic Acid Answer:<\/strong> (c) Formic Acid<\/p>\n\n\n\n Logic:<\/strong> Q7. ‘Bronze’ is an alloy of which two metals?<\/strong><\/p>\n\n\n\n (a) Copper and Zinc Answer:<\/strong> (b) Copper and Tin<\/p>\n\n\n\n Logic:<\/strong> Q8. Which of the following is used as a moderator in Nuclear Reactors?<\/strong><\/p>\n\n\n\n (a) Ordinary Water Answer:<\/strong> (b) Heavy Water (D\u2082O)<\/p>\n\n\n\n Logic:<\/strong> Q9. The hardest natural substance on Earth is:<\/strong><\/p>\n\n\n\n (a) Gold Answer:<\/strong> (c) Diamond<\/p>\n\n\n\n Logic:<\/strong> Q10. Which gas is filled in electric bulbs to prevent the filament from burning?<\/strong><\/p>\n\n\n\n (a) Oxygen Answer:<\/strong> (c) Argon<\/p>\n\n\n\n Logic:<\/strong> <\/p>\n\n\n\n <\/p>\n\n\n\n Chemistry is not about memorizing thick books. It is about understanding the logic behind elements and reactions. If you study smartly by focusing on the right charts and tables, you can finish the syllabus quickly. Here are 5 simple tips to help you master Chemistry for the RRB Group D exam:<\/p>\n\n\n\n 1. Master the Periodic Table:<\/strong> You don’t need to learn all 118 elements. Just memorize the first 20 elements (Hydrogen to Calcium) and the Noble Gases (Group 18). Questions on Atomic Number and Valency come directly from here.<\/p>\n\n\n\n <\/p>\n\n\n <\/p>\n\n\n\n 2. Learn Chemical Names:<\/strong> RRB loves asking “Common Names” vs. “Chemical Names.” Make a list:<\/p>\n\n\n\n 3. Understand the pH Scale:<\/strong> Remember the pH values of common things like Lemon (2.5), Blood (7.4), and Water (7). Know that Acid turns Blue Litmus Red.<\/p>\n\n\n\n <\/p>\n\n\n <\/p>\n\n\n\n 4. Focus on Alloys & Ores: <\/strong>Memorize which metal comes from which ore (e.g., Bauxite is the ore of Aluminum). Also, learn the composition of Brass, Bronze, and Solder.<\/p>\n\n\n\n 5. Attempt Topic Tests:<\/strong> Reading is passive. Testing is active. Attempt our Free Topic Tests to check if you remember the formulas under time pressure.<\/p>\n\n\n\n <\/p>\n\n\n <\/p>\n\n\n\n Join our exclusive Telegram group for expert guidance, personalized tips, and real-time solutions to boost your SSC exam prep. [Click here to join now!<\/a>]<\/em><\/strong><\/p>\n\n\n\n <\/p>\n\n\n\nWhy is Chemistry Important for RRB Group D?<\/h2>\n\n\n\n
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Download Free PDF of Chemistry Questions for RRB Group D<\/h2>\n\n\n\n
(b) Nitrogen
(c) Carbon Dioxide
(d) Argon<\/p>\n\n\n\n
Carbon dioxide (CO\u2082) traps heat in the Earth\u2019s atmosphere, leading to an increase in global temperature, known as global warming. Methane is another important greenhouse gas, but CO\u2082 is the primary contributor.<\/p>\n\n\n\n
(b) NaHCO\u2083
(c) NaCl
(d) NaOH<\/p>\n\n\n\n
Sodium Bicarbonate (NaHCO\u2083) is known as Baking Soda. Sodium Carbonate (Na\u2082CO\u2083) is Washing Soda. Students often confuse these two, so this distinction is important.<\/p>\n\n\n\n
(b) Atomic Number
(c) Density
(d) Melting Point<\/p>\n\n\n\n
Mendeleev originally arranged elements according to atomic mass, but Henry Moseley later corrected this by arranging elements based on atomic number, which is followed in the Modern Periodic Table.<\/p>\n\n\n\n
(b) Iron
(c) Mercury
(d) Aluminum<\/p>\n\n\n\n
Mercury (Hg) is the only metal that remains liquid at room temperature. Bromine is the only non-metal that is liquid under the same conditions.<\/p>\n\n\n\n
(b) 7
(c) 14
(d) 1<\/p>\n\n\n\n
A pH value of 7 indicates a neutral substance. Values less than 7 are acidic, while values greater than 7 are basic or alkaline.<\/p>\n\n\n\n
(b) Citric Acid
(c) Formic Acid (Methanoic Acid)
(d) Lactic Acid<\/p>\n\n\n\n
When an ant bites, it injects Formic Acid, which causes pain and irritation. Vinegar contains acetic acid, while curd contains lactic acid.<\/p>\n\n\n\n
(b) Copper and Tin
(c) Iron and Carbon
(d) Lead and Tin<\/p>\n\n\n\n
Bronze is formed by mixing Copper and Tin. Copper and Zinc form Brass. Questions related to alloys are frequently asked in RRB exams.<\/p>\n\n\n\n
(b) Heavy Water (D\u2082O)
(c) Liquid Sodium
(d) Hydrogen<\/p>\n\n\n\n
Heavy water is used to slow down fast-moving neutrons during nuclear fission, helping to control the nuclear reaction efficiently.<\/p>\n\n\n\n
(b) Iron
(c) Diamond
(d) Platinum<\/p>\n\n\n\n
Diamond is an allotrope of carbon and is the hardest known natural substance due to its strong three-dimensional crystal structure.<\/p>\n\n\n\n
(b) Hydrogen
(c) Argon
(d) Chlorine<\/p>\n\n\n\n
Argon is an inert gas and does not react easily. It prevents the tungsten filament inside the bulb from reacting with oxygen and burning out. Nitrogen is also sometimes used.<\/p>\n\n\n\n5 Tips to Prepare Chemistry for RRB Group D<\/h2>\n\n\n\n
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