SSC CHSL 2023- Important Science Questions

SSC CHSL exam consists of three tiers: Tier I is a computer-based objective test, Tier II is a descriptive paper, and Tier III is a skill test.

Science is one of the important subjects in the SSC CHSL Tier I exam, as it covers topics from Physics, Chemistry and Biology. The Science section carries 25 questions for 50 marks, and tests the candidates’ basic knowledge and understanding of scientific concepts and phenomena . In this blog post, we will provide some tips and strategies on how to prepare for Science in SSC CHSL.

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Know the syllabus and exam pattern

The first step in preparing for any exam is to know the syllabus and exam pattern thoroughly. The syllabus of Science for SSC CHSL Tier I covers topics such as:

• Physics: Units and measurements, motion, force, work, energy, power, gravitation, sound, light, electricity, magnetism, etc.
• Chemistry: Matter, atoms, molecules, elements, compounds, mixtures, chemical reactions, acids, bases, salts, metals, non-metals, carbon and its compounds, periodic table, etc.
• Biology: Cell structure and function, tissues, organs, systems, nutrition, digestion, respiration, excretion, circulation, reproduction, genetics, evolution, diseases and prevention, etc.

The exam pattern of SSC CHSL Tier I is as follows:

• The exam is conducted online and consists of 100 questions for 200 marks.
• The duration of the exam is 60 minutes (80 minutes for PwD candidates).
• There are four sections in the exam: English Language (25 questions), General Intelligence (25 questions), Quantitative Aptitude (25 questions) and General Awareness (25 questions).
• Each question carries 2 marks and there is a negative marking of 0.5 marks for each wrong answer.

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Refer to NCERT books and previous year papers

The best source of preparation for Science in SSC CHSL is the NCERT books of class 9th and 10th. These books cover all the topics in detail and provide clear explanations and examples. They also help in building the conceptual clarity and foundation for the subject. Candidates should also refer to the previous year papers of SSC CHSL to get an idea of the type and level of questions asked in the exam. Solving previous year papers also helps in improving speed, accuracy and time management skills .

Revise important formulas and facts

Science is a subject that requires memorization of many formulas and facts. Candidates should revise these formulas and facts regularly and make short notes or flashcards for quick revision. Some of the important formulas and facts that candidates should remember are:

• Physics: Speed = distance/time; Acceleration = change in velocity/time; Force = mass x acceleration; Work = force x displacement; Power = work/time; Energy = power x time; Gravitational force = G x (mass1 x mass2)/distance^2; Ohm’s law: Voltage = current x resistance; etc.
• Chemistry: Atomic number = number of protons; Atomic mass = number of protons + number of neutrons; Valency = number of electrons lost or gained by an atom; Mole = 6.022 x 10^23 particles; Avogadro’s law: Equal volumes of gases at the same temperature and pressure contain equal number of molecules; etc.
• Biology: Cell theory: All living organisms are composed of cells; Cell wall is present only in plant cells; Mitochondria are the powerhouses of the cell; DNA is the genetic material of the cell; Photosynthesis: 6CO₂ + 6H₂O -> C₆H₁₂O₆ + 6O₂; Respiration: C₆H₁₂O₆ + 6O₂ -> 6CO₂ + 6H₂O + energy; etc.

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Practice mock tests and quizzes

The best way to test one’s preparation level and identify one’s strengths and weaknesses is to practice mock tests and quizzes regularly. Mock tests simulate the actual exam environment and help in building confidence and overcoming exam fear. Quizzes help in assessing one’s knowledge and understanding of various topics and concepts. Candidates should practice mock tests and quizzes from reliable sources and analyze their performance and improve their weak areas.

Stay updated with current affairs and general science

The General Awareness section of SSC CHSL Tier I also includes questions based on current affairs and general science. Candidates should stay updated with the latest news and events related to science and technology, environment, health, space, etc. They should also read newspapers, magazines, journals and online sources to enhance their general science knowledge and awareness. Some of the sources that candidates can refer to are:

• The Hindu
• Science Daily
• National Geographic
• NASA
• WHO
• etc.

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By following these tips and strategies, candidates can prepare well for Science in SSC CHSL and score high marks in the exam. Science is a scoring subject if one has a clear understanding of the concepts and facts. Candidates should also revise the topics regularly and practice as many questions as possible to improve their speed and accuracy.

Important Science Questions for SSC CHSL

Calamine is a major ore of?

1. Lead
2. Zinc
3. Copper
4. Mercury

Georg Simon Ohm who discovered Ohm’s Law hailed from which country?

1. Russia
2. Germany
3. Spain
4. Poland

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When blood changes from liquid to gel, this process is called:

1. Haemophilia
2. Coagulation
3. Anaemia
4. Systole

Method which can’t be used to remove hardness of water is called:

1. Adding Sodium Carbonate
2. Distillation
3. Adding Caustic Soda
4. Boiling

Which is the correct sequence of EM spectrum in ascending order of wavelength?

1. Gamma, X Ray, Visible, UV, IR, Radio
2. Gamma, X Ray, UV, IR, Visible, Radio
3. Gamma, X Ray, UV, Visible, IR, Radio
4. Gamma, X Ray, UV, Visible, Radio, IR

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Who discovered the law of conservation of mass?

1. Issac Newton
2. Amedeo Avogadro
3. Ernest Rutherford
4. Antoine Laurent Lavoisier

Natalite is a mixture of?

1. Ether and Petrol
2. Petrol and Alcohol
3. Petrol and Potassium Iodide
4. Ether and Alcohol

Which equation best reflects the Ostwald Dilution law?

1. Concentration of any ion = √ CK
2. Concentration of any ion = C√ K
3. Concentration of any ion = CK
4. Concentration of any ion = √ K/C

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Khaira disease in rice is caused due to the deficiency of which element?

1. Boron
2. Manganese
3. Sinc
4. Copper

Pysolusite is an important ore of which element?

1. Uranium
2. Mercury
3. Iron
4. Manganese

Shock-absorbers are usually made of steel as it___

1. Has higher elasticity
2. Has lower elasticity
3. Is not brittle
4. Is not ductile

Periodic table is divided in how many periods?

1. 5
2. 6
3. 7
4. 8

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Which of the following is the primary sex organ in females?

1. Uterus
2. Fallopian tube
3. Ovary
4. Vagina

Bolometer is used to detect the presence of which rays?

1. Infrared rays
2. Visible rays
3. Ultraviolet rays
4. All of the above

We hope this article helps you in your preparation for Science subjects in SSC CHSL exam. All the best!