Робочий аркуш «Хімія для вступних іспитів на медсестринство» з відповідями

Charles's law describes the relationship between which two properties of a gas, at constant pressure?

1. ADensity and mass
2. BPressure and volume
3. CVolume and temperature
4. DPressure and number of moles

What is the change from a liquid to a solid called?

1. AMelting
2. BEvaporation
3. CCondensation
4. DFreezing

Хлор, бром і йод — приклади якої групи?

1. AПерехідних металів
2. BЛужних металів
3. CГалогенів
4. DБлагородних газів

What are isomers?

1. AMolecules that contain the same number of bonds
2. BCompounds with the same structure but different molecular formulas
3. CCompounds with the same molecular formula but different structures
4. DAtoms of the same element with different numbers of neutrons

Water can act as an acid in some reactions and as a base in others. What is such a substance called?

1. ASaturated
2. BAmphoteric
3. CIsotonic
4. DNeutral

What is 380 mmHg in atmospheres?

1. A2 atm
2. B380 atm
3. C0,38 atm
4. D0,5 atm

Why is gamma radiation used to sterilise sealed medical supplies such as syringes?

1. AIt heats the items to very high temperatures, so the microbes are burned away inside the pack
2. BIt adds a protective chemical coating to the items
3. CIt passes through the packaging and kills microbes without making the items radioactive
4. DIt is stopped by the packaging, so it only cleans the outside

A reaction should produce 2 mol of a product with a molar mass of 30 g/mol, but only 48 g is collected. What is the percent yield?

1. A80%
2. B60%
3. C48%
4. D125%