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Physical and Chemical Changes
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Game Code: 635183
English
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Physical and Chemical Changes class 7
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Ram took lime water in a bowl and blew air into the water using a straw. The lime water turned milky. Which gas turned water into milky colour?
Carbon dioxide
10
A film of brownish substance on the iron articles left open in humid condition is called
Rust
10
Name the acid vinegar contains?
Acetic Acid
10
Iron + Air + Water -->
Rust
10
Motion of your hands while running, Motion of a child on a see-saw and Motion of the hammer of an electric bell.
Oscillatory motion
10
A simple pendulum undergoes 10 oscillations in 5 seconds. The time period of the pendulum is
1/2s
10
A simple pendulum undergoes 2 oscillations in 20 seconds. The time period of the pendulum is
10s
10
A bus travelled 50 km in 2 hours. The speed of the bus for that period is
25km/hr
10
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