When piston is pulled in a spray pump, pressure inside the cylinder increases. Why liquid filled inside don't spill even after releasing the force on the piston?

Surface tension causes barrier force near the nozzle of the pump

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Cross sectional area of nozzle is small and escape of liquid needs external force

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Pressure inside cylinder is less than atmospheric pressure, hence liquid cant escape

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Pressure inside cylinder is equal to atmospheric pressure, hence liquid cant escape

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Solution

The correct option is D Pressure inside cylinder is equal to atmospheric pressure, hence liquid cant escape
When liquid is filled inside the cylinder, under equilibrium its pressure equals atmospheric pressure. Since, there is no difference in pressure in cylinder and outside no liquid leaves the pump.

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