a syringe is filled with X. when the plunger is pushed inwards, the volume of X remains the same.
what can X be?
a) helium b) mercury
c) nitrogen d) carbondioxide

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Solution

If a syringe is filled with gas and push the plunger inwards, the volume of gas does not change as gases are compressible.
In given options helium and nitrogen is present in gaseous form or not is not mentioned. Mercury is liquid. So, the only gas is carbon dioxide.
Hence the X in the syringe will be CO₂.

Note : If Nitrogen and helium is present in gaseous form then even it will not be compress.

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a syringe is filled with X. when the plunger is pushed inwards, the volume of X remains the same.what can X be?a) helium b) mercuryc) nitrogen d) carbondioxide

a syringe is filled with X. when the plunger is pushed inwards, the volume of X remains the same.
what can X be?
a) helium b) mercury
c) nitrogen d) carbondioxide