Užduočių lapas tema Chemija slaugos stojamiesiems egzaminams su atsakymais

Natris ir kalis priklauso kuriai grupei?

1. ATauriosioms dujoms (18 grupė)
2. BŠarminiams metalams (1 grupė)
3. CŠarminiams žemės metalams (2 grupė)
4. DHalogenams (17 grupė)

Which positive ion is found in the highest concentration inside most body cells?

1. ACalcium (Ca²⁺)
2. BPotassium (K⁺)
3. CSodium (Na⁺)
4. DMagnesium (Mg²⁺)

Which mixture is a suspension?

1. ASand stirred into water
2. BSalt dissolved in water
3. COxygen dissolved in water
4. DSugar dissolved in water

Which substance is a non-electrolyte when dissolved in water?

1. ASodium chloride
2. BHydrochloric acid
3. CGlucose
4. DPotassium chloride

Koks ryšys yra deguonies dujų molekulėje O₂?

1. APoliarinis kovalentinis pavienis ryšys
2. BMetalinis ryšys
3. CJoninis ryšys
4. DNepoliarinis kovalentinis dvigubas ryšys

During digestion, large molecules are broken down by adding water across their bonds. What is this reaction called?

1. APolymerisation
2. BCondensation
3. CCombustion
4. DHydrolysis

Reakcijoje CuO + H₂ → Cu + H₂O kuri medžiaga redukuojasi?

1. AVandenilis, nes prisijungia deguonies
2. BVaris, nes praranda elektronus
3. CVanduo, nes susidaro
4. DVario oksidas, nes varis gauna elektronų

Vitamin C is water-soluble and vitamin D is fat-soluble. What does this suggest about their molecules?

1. ABoth are ionic compounds
2. BVitamin C is nonpolar, while vitamin D is strongly polar
3. CBoth are equally polar
4. DVitamin C is polar, while vitamin D is mostly nonpolar