Chemia na egzaminy wstępne na pielęgniarstwo: karta pracy z odpowiedziami

What colour does blue litmus paper turn in an acid?

1. APurple
2. BGreen
3. CBlue (no change)
4. DRed

What is a cation?

1. AA negatively charged ion
2. BA positively charged ion
3. CA neutral atom
4. DA molecule with no charge

How is percent yield calculated?

1. A(Actual yield ÷ theoretical yield) × 100
2. B(Mass of reactants ÷ mass of products) × 100
3. CActual yield − theoretical yield
4. D(Theoretical yield ÷ actual yield) × 100

What is the name of the compound CaCO₃?

1. ACalcium carbide
2. BCalcium oxide
3. CCarbon calcium trioxide
4. DCalcium carbonate

A reaction has ΔH = −890 kJ/mol. What does the negative sign tell you?

1. AThe reaction is exothermic
2. BThe reaction is at equilibrium
3. CThe reaction needs a catalyst
4. DThe reaction is endothermic

A red blood cell is placed in pure water (a hypotonic solution). What happens?

1. AWater leaves the cell, which shrinks and wrinkles
2. BNothing happens to the cell
3. CWater enters the cell, which swells and may burst
4. DSalt enters the cell, which shrinks

What is the formula of calcium phosphate, made from Ca²⁺ and PO₄³⁻ ions?

1. ACaPO₄
2. BCa₃(PO₄)₂
3. CCa₂(PO₄)₃
4. DCa₃PO₄

Which coefficients balance the equation for cellular respiration, __C₆H₁₂O₆ + __O₂ → __CO₂ + __H₂O?

1. A2, 6, 12, 6
2. B1, 6, 6, 6
3. C1, 3, 6, 6
4. D1, 6, 6, 12