Page 62 - GK Class 07

54 Test Your Scientific Knowledge

Put a tick (3) on the correct option.

1. What does ‘Pascal’ measure ?

a) Current b) Temperature c) Pressure
2. The most important ore of aluminum is :
a) Calcite b) Bauxite c) Galena

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3. In Einstein equation E = mc , what does c stand for ?
a) Energy b) Weight c) Speed of light

4. Which one is a radioactive element ?
a) Carbon b) Gold c) Radium

5. Which is by far the smallest of the three main parts of an atom ?
a) Protons b) Electrons c) Neutrons

6. What are diamond and coal made up of ?
a) Carbon b) Nitrogen c) Phosphorus
7. Which gas is usually filled in the electric bulb ?

a) Nitrogen b) Hydrogen c) Oxygen
8. The strength of a matter is measured in :

a) Ohm b) Teslas c) Carat
9. Which gas is created when sunlight breaks up oxygen ?
a) Neon b) Helium c) Ozone

10. What is chemical symbol of tin ?
a) Sn b) Pb c) Mn

11. Which is the first element in the Periodic Table ?
a) Helium b) Hydrogen c) Oxygen
12. The average salinity of sea water is :

a) 3.5 % b) 3 % c) 2.5 %
13. Which element adds rigidity to bones and teeth ?

a) Calcium b) Phosphorus c) Magnesium
14. What kind of electrical charge do electrons have ?

a) Positive b) Negative c) Neutral
15. Which is the hardest substance available on the Earth ?

a) Gold b) Iron c) Diamond

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