CDS Physics and Science 2 — Questions and Answers
Question 1: What is the chemical symbol for gold?
- Au (Correct answer)
- Ag
- Go
- Gd
Correct answer: Au
The chemical symbol for gold is Au, derived from the Latin word 'Aurum'.
Question 2: Which type of electromagnetic radiation has the highest frequency?
- Gamma rays (Correct answer)
- X-rays
- Ultraviolet rays
- Radio waves
Correct answer: Gamma rays
Gamma rays have the highest frequency (and shortest wavelength) in the electromagnetic spectrum.
Question 3: Archimedes' Principle states that a body immersed in a fluid experiences an upward force equal to what?
- Weight of fluid displaced (Correct answer)
- Volume of the body
- Mass of the body
- Density of the fluid
Correct answer: Weight of fluid displaced
Archimedes' Principle states buoyant force equals the weight of the fluid displaced by the object.
Question 4: What is the chemical formula of common salt?
- NaCl (Correct answer)
- KCl
- CaCl₂
- NaOH
Correct answer: NaCl
Common salt (sodium chloride) has the chemical formula NaCl, made of sodium and chlorine ions.
Question 5: Which organ in the human body produces insulin?
- Pancreas (Correct answer)
- Liver
- Kidney
- Spleen
Correct answer: Pancreas
The pancreas produces insulin in its beta cells (islets of Langerhans) to regulate blood sugar levels.
Question 6: The Law of Conservation of Energy states that energy can neither be created nor destroyed, but only what?
- Converted from one form to another (Correct answer)
- Absorbed into matter
- Lost as heat
- Stored in fields
Correct answer: Converted from one form to another
The Law of Conservation of Energy states energy can only be converted from one form to another, with the total always constant.
CDS Physics and Science 2
What is the chemical symbol for gold?