Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

25 °C'de saf suyun pH değeri nedir?

1. A7
2. B0
3. C1
4. D14

Bir asit ve bir baz birbirini nötrleştirdiğinde ne oluşur?

1. ABir tuz ve su
2. BBir metal ve hidrojen gazı
3. CYalnızca karbondioksit
4. DDaha güçlü bir asit

What is the SI unit of temperature?

1. ADegree Fahrenheit
2. BJoule
3. CKelvin
4. DDegree Celsius

A student tests how temperature affects the rate of a reaction. What is the independent variable?

1. AThe volume of acid, which is kept the same
2. BThe temperature
3. CThe type of beaker used
4. DThe reaction rate

What are London dispersion forces?

1. AForces that hold protons together in the nucleus
2. BAttractions between a hydrogen atom and a metal ion
3. CWeak, temporary attractions caused by shifting electrons in molecules
4. DStrong bonds formed by transferring electrons

Why can a very high fever disrupt the body's chemical reactions?

1. AHigh temperatures turn enzymes into fats
2. BHigh temperatures can change the shape of enzymes so they stop working
3. CHigh temperatures remove the water from blood
4. DHigh temperatures make every enzyme work faster without any limit

Steel can be protected from rusting by coating it with zinc (galvanising). Why does the steel stay protected even if the zinc coating is scratched?

1. AZinc is less reactive than iron, so it pushes oxygen and water away from the iron
2. BZinc turns the iron into a noble metal
3. CZinc is more reactive than iron, so it corrodes instead of the iron
4. DZinc absorbs all the water from the air

Ethanol (CH₃CH₂OH) and dimethyl ether (CH₃OCH₃) have the same formula, C₂H₆O, but ethanol boils at a much higher temperature. Why?

1. AEthanol has more carbon atoms
2. BDimethyl ether is ionic and ethanol is covalent
3. CEthanol has an O–H group, so its molecules form hydrogen bonds with each other
4. DEthanol molecules are heavier than dimethyl ether molecules