PAX SCIENCE NLN EXAM UPDATE 2026

PAX SCIENCE NLN EXAM UPDATE 2026

A person blows his breath into a straw that is placed in limewater. The limewater

becomes cloudy because the person's breath contains

A.) carbon dioxide.

B.) hydrogen.

C.) oxygen.

D.) nitrogen. - answer: carbon dioxide.

A physician measures the pulse and blood pressure (BP) of all patients on a routine

basis. Which of these measurements show the normal BP values for a resting adult

patient?

A.) 125/95 mm Hg

B.) 120/80 mm Hg

C.) 100/80 mm Hg

D.) 72/120 mm Hg - answer: 120/80 mm Hg

A woman suddenly chokes on a piece of food and clutches frantically at her throat.

An immediate remedy is to

A.) have her bend forward and tell her to cough.

B.) insert a finger or a blunt object toward the back of the mouth.

C.) apply quick, hard pressures successively to her abdomen, just beneath her

diaphragm.

D.) phone "emergency" for help. - answer: apply quick, hard pressures successively

to her abdomen, just beneath her diaphragm.

An unknown gas is more dense than air, does not support combustion, and turns a

limewater solution cloudy. This gas is most probably

A.) ammonia.

B.) methane.

C.) carbon dioxide.

C.) hydrogen. - answer: carbon dioxide.