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- Oxalic acid
- Sulphuric and nitric acids
- Acetic acid
- Carbolic acid
Everyday Science MCQs
In an oil lamp, the oil rises up in the wick due to _____.
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- Viscosity of oil
- Change in temperature
- Capillary action
- Atmospheric pressure
Heating element of an electric heater is made up of _____.
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- Nichrome
- Graphite
- Tungsten
- Chromium
During a total solar eclipse there is most likely to be _____.
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- an increase in the rate of photosynthesis
- a decrease in the rate of respiration
- a decrease in the rate of photosynthesis
- no effect on either photosynthesis or respiration
When water is filled in a bottle and is allowed to freeze, the bottle breaks because _____.
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- Water expands on freezing
- Bottle contracts at freezing point
- Temperature outside the bottle is less than that inside the bottle
- None of these
A tight-rope walker carries a long pole which he holds across his body. The purpose of this pole is to _____.
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- Prop him up if he falls
- To keep the centre of gravity always vertically above the rope
- Spread out his weight and reduce the pressure on the rope
- Add extra weight to keep the rope tightly stretched
The sky appears blue because the earths _____.
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- Reflects blue light
- Scatters blue light
- Transmits blue light
- has actual blue cover
The property by virtue of which metals can be beaten into thin sheets is known as _____.
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- Density
- Ductility
- Conductivity
- Malleability
Steering of a car involves _____.
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- A single force
- A pair of forces acting along the same line and in opposite direction
- Two forces acting in the same direction
- Two forces acting along different lines and in opposite direction
Which one of the following is the main culprit in the thinning of Ozone layer in the earth’s stratosphere?
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- Carbon dioxide
- Nitrogen oxides
- Chlorofluorocarbons
- Methane
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