Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

Between which kinds of elements do covalent bonds usually form?

1. ATwo nonmetals
2. BTwo group 1 metals
3. CA metal and a noble gas
4. DA metal and a nonmetal

Which of these is a polyatomic ion?

1. ASodium, Na⁺
2. BSulfate, SO₄²⁻
3. COxide, O²⁻
4. DChloride, Cl⁻

What are the usual units of molar mass?

1. Amol/g
2. Bg/L
3. Cg/mol
4. Dmol/L

When two monomers join to form a larger molecule and a water molecule is released, what is the reaction called?

1. AHydrolysis (splitting with water)
2. BNeutralisation
3. CCombustion
4. DCondensation (dehydration synthesis)

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

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

How does a catalyst speed up a reaction?

1. AIt provides a different pathway with a lower activation energy
2. BIt adds extra reactant to the mixture
3. CIt raises the temperature of the reactants so they move faster
4. DIt makes the reaction more exothermic

Şeker suda çözündüğünde bu neden kimyasal değişim değildir?

1. AŞeker molekülleri şeker olarak kalır ve geri kazanılabilir
2. BŞeker çözündüğünde her zaman ısı açığa çıkar
3. CŞeker suyla tepkimeye girerek yeni bir bileşik oluşturur
4. DŞeker yok olur ve yerini su alır

Methane burns as CH₄ + 2O₂ → CO₂ + 2H₂O. What mass of CO₂ (44 g/mol) forms from 16 g of CH₄ (16 g/mol)?

1. A88 g
2. B22 g
3. C16 g
4. D44 g