Kerala PSC - Important and Expected General Science Questions - 69

---

1.The gas formed when Potassium permanganate is heated:
[a] Nitrogen
[b] Oxygen
[c] Hydrogen
[d] Ammonia

---

2. The pungent smell emitted while scratching the match box:
[a] Oxygen
[b] Hydrogen sulphide
[c] Methane
[d] Sulphur dioxide

---

3. The gas formed in Sun as the result of nuclear fusion:
[a] Oxygen
[b] Hydrogen
[c] Methane
[d] Helium

---

4. What is the colour of ozone:
[a] Yellow
[b] Orange
[c] Blue
[d] Red

---

5. Which metal is called ‘White Gold’?
[a] Mercury
[b] Silver
[c] Iron Sulphide
[d] Platinum

---

6. Which metal has the symbol ‘Hg’?
[a] Hydrogen
[b] Iron
[c] Aluminium
[d] Mercury

---

7. The metal used to make the nib of fountain pens:
[a] Silver
[b] Aluminium
[c] Lead
[d] Iridium

---

8. The name ‘Aurum’ is related to the metal:
[a] Tungsten
[b] Osmium
[c] Gold
[d] Iridium

---

9. The substances added to ore to remove impurities is called:
[a] Gang   
[b] Flux
[c] Aqua regia
[d] Alloy

---

10. Which is known as ‘the metal of hope’?
[a] Titanium
[b] Uranium
[c] Silver
[d] Platinum

---

11. Which one of the following can be used to absorb neutrons to control the chain reaction during nuclear fission?
[a] Boron
[b] Heavy water
[c] Uranium
[d] Plutonium

---

12. The colour of pure diamond:
[a] Red 
[b] Blue
[c] Green
[d] Colourless

---

13. When water itself combines chemically with some element or mineral is called:
[a] Carbonation
[b] Desilication
[c] Hydration
[d] Oxidation

---

14. Who formulated the system of pH value?
[a] Lavosier
[b] Pasteur
[c] Dalton
[d] Sorenson

---

15. Bronze is an alloy of Copper and _____
[a] Tin 
[b] Zinc 
[c] Lead 
[d] Nickel

---

---