Scheda di esercizi di Chimica per i test di ammissione a infermieristica con soluzioni

Which element is a metalloid?

1. AArgon
2. BSulfur
3. CSodium
4. DSilicon

What is the formula of sulfuric acid?

1. AHCl
2. BH₂SO₃
3. CH₂SO₄
4. DHNO₃

How many millilitres are in 1 litre?

1. A1000
2. B10
3. C100
4. D10,000

What is nuclear fission?

1. AThe burning of uranium in oxygen
2. BThe loss of electrons from an atom
3. CThe splitting of a heavy nucleus into smaller nuclei
4. DThe joining of two light nuclei to form a heavier nucleus

A piece of metal has a density of 8 g/cm³ and a volume of 5 cm³. What is its mass?

1. A13 g
2. B0,625 g
3. C1,6 g
4. D40 g

Glucose has the molecular formula C₆H₁₂O₆. What is its empirical formula?

1. ACHO
2. BC₆H₁₂O₆
3. CC₂H₄O₂
4. DCH₂O

A strip of magnesium is burned in air and the white ash weighs more than the original strip. Why?

1. AMagnesium atoms became heavier when heated
2. BThe ash absorbed water from the flame
3. CMass was created during the reaction
4. DOxygen from the air has combined with the magnesium

Which list puts fluorine, chlorine and bromine in order of increasing electronegativity?

1. ABr < Cl < F
2. BBr < F < Cl
3. CF < Cl < Br
4. DCl < Br < F