SSC General Science 1 — Questions and Answers
Question 1: Which of the following is the SI unit of electric current?
- Volt
- Ampere (Correct answer)
- Ohm
- Watt
Correct answer: Ampere
The Ampere (A) is the SI base unit of electric current, defined as the flow of one coulomb of charge per second.
Question 2: Which gas is produced when dilute hydrochloric acid reacts with zinc?
- Oxygen
- Carbon dioxide
- Hydrogen (Correct answer)
- Nitrogen
Correct answer: Hydrogen
When zinc reacts with dilute HCl, zinc chloride and hydrogen gas are produced: Zn + 2HCl → ZnCl₂ + H₂.
Question 3: What is the process by which green plants make their own food using sunlight?
- Respiration
- Transpiration
- Photosynthesis (Correct answer)
- Fermentation
Correct answer: Photosynthesis
Photosynthesis is the process by which plants use sunlight, water, and CO₂ to produce glucose and oxygen.
Question 4: The speed of light in a vacuum is approximately:
- 3 × 10⁶ m/s
- 3 × 10⁸ m/s (Correct answer)
- 3 × 10¹⁰ m/s
- 3 × 10⁴ m/s
Correct answer: 3 × 10⁸ m/s
The speed of light in vacuum is approximately 3 × 10⁸ meters per second (about 300,000 km/s).
Question 5: Which organ in the human body produces insulin?
- Liver
- Kidney
- Pancreas (Correct answer)
- Spleen
Correct answer: Pancreas
Insulin is produced by the beta cells of the islets of Langerhans in the pancreas to regulate blood glucose levels.
Question 6: Newton's First Law of Motion is also known as the Law of:
- Gravitation
- Inertia (Correct answer)
- Momentum
- Acceleration
Correct answer: Inertia
Newton's First Law states that a body remains at rest or in uniform motion unless acted upon by an external force — this property is called inertia.
Question 7: Which element has the chemical symbol 'Fe'?
- Fluorine
- Francium
- Iron (Correct answer)
- Copper
Correct answer: Iron
Fe comes from 'Ferrum', the Latin word for iron; it is the chemical symbol for iron on the periodic table.
SSC General Science 1
Which of the following is the SI unit of electric current?