Cevaplı Hemşirelik giriş sınavları için kimya çalışma kâğıdı

Atomlar arasında elektronlar paylaşıldığında hangi tür bağ oluşur?

1. AKovalent bağ
2. BNükleer bağ
3. Cİyonik bağ
4. DMetalik bağ

What is oxidation, in terms of electrons?

1. AGain of neutrons
2. BGain of electrons
3. CLoss of protons
4. DLoss of electrons

Su neden sıklıkla evrensel çözücü olarak adlandırılır?

1. AMolekülünde hiçbir yerde kısmi yük yoktur, bu yüzden her şeyle karışır
2. BHer maddeyi tamamen çözer
3. CDiğer yaygın sıvılardan daha fazla maddeyi çözer
4. DDünya'da bulunan tek sıvıdır

Which type of radiation can be stopped by a sheet of paper?

1. AGamma rays
2. BX-rays
3. CBeta particles (fast electrons)
4. DAlpha particles

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

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

In the reaction Zn + Cu²⁺ → Zn²⁺ + Cu, which species loses electrons?

1. ACu²⁺
2. BCu
3. CZn²⁺
4. DZn

A solution of acetic acid conducts electricity only weakly, while hydrochloric acid of the same concentration conducts strongly. Why?

1. AHydrochloric acid contains metal atoms
2. BAcetic acid does not dissolve in water at all
3. CAcetic acid only partly ionises, so it forms fewer ions
4. DAcetic acid forms more ions than hydrochloric acid does

Making ammonia (N₂ + 3H₂ ⇌ 2NH₃) is exothermic. A low temperature would give a higher yield, yet factories use a moderately high temperature. Why?

1. AAt low temperatures the reaction is too slow to be useful
2. BHigher temperatures shift the equilibrium toward more ammonia
3. CThe catalyst only works when the reaction is endothermic
4. DLow temperatures would make the ammonia explode