Download App

Physical and Chemical Changes — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7SciencePhysical and Chemical Changes1 Mark
MCQ
Rusting occurs when iron is exposed to:
  • ✓
    Oxygen and water
  • B
    Soil and rain
  • C
    Breeze and sunlight
  • D
    Salt water and clouds
✓

Answer

Correct option: A.
Oxygen and water
When iron is in contact with water and oxygen, it rusts. If salt is present, for example in seawater or salt spray, the iron tends to rust more quickly, as a result of chemical reactions.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "MCQ (1 Marks)" from Physical and Chemical Changes→Physical and Chemical Changes — all question types→Science STD 7 question papers→Gujarat Board STD 7 question papers→Gujarat Board question paper generator→

Similar questions

The acidic substance injected by ants is:
→
Puja is writing some statements but she confused to know whether the statements are correct or not? If you know the answer to this question, then tell her:
→
It may be possible that we are living in an area where there is sufficient rainfall and yet there is shortage of water, because of:
→
The distance-time graph for a vehicle standing on a road side will be
→
Read The Following Statement About Wool Yielding Animals And Choose The Incorrect Sentence:
→
Breaking down of rocks by the action of wind and climate is called $.........$
→
A chemical change may involve:
→
Water is present in lakes in the form of:
→
Seema is in a hurry and wants her noodles to cool down faster. She should put it on a plate made of:
→
The times taken by a pendulum to complete one oscillation is:
→