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

Quale gruppo contiene i gas nobili, come elio e neon?

1. AIl gruppo 18
2. BIl gruppo 1
3. CIl gruppo 2
4. DIl gruppo 17

At sea level, at what temperature does pure water freeze?

1. A100 °C (212 °F)
2. B−32 °C (−26 °F)
3. C0 °C (32 °F)
4. D32 °C (90 °F)

Which state of matter has a fixed volume but takes the shape of its container?

1. AGas
2. BPlasma
3. CSolid
4. DLiquid

Perché i gas nobili reagiscono raramente?

1. ASono tutti radioattivi
2. BNon hanno affatto elettroni
3. CI loro gusci elettronici esterni sono già completi
4. DI loro atomi sono molto più grandi degli altri atomi

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 make every enzyme work faster without any limit
4. DHigh temperatures remove the water from blood

How many lone (non-bonding) pairs of electrons are on the oxygen atom in a water molecule?

1. A2
2. B4
3. C0
4. D1

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

1. A1, 6, 6, 6
2. B2, 6, 12, 6
3. C1, 3, 6, 6
4. D1, 6, 6, 12

A mixture contains sand, salt and water. Which sequence separates all three?

1. ADistil first to remove the sand, then filter out the salt
2. BFilter to remove the sand, then distil the filtrate to collect water and leave salt
3. CUse a magnet to remove the salt, then filter the sand
4. DEvaporate all the water first, then filter the salt away from the dry sand