उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

What is osmosis?

1. AThe movement of solute particles against a gradient using energy
2. BThe dissolving of a gas in a liquid
3. CThe breaking of a solid into ions
4. DThe movement of water across a semipermeable membrane

Which element is a metalloid?

1. ASilicon
2. BArgon
3. CSodium
4. DSulfur

What is the chemical formula of carbon dioxide?

1. ACO₂
2. BCO
3. CCO₃
4. DC₂O

Using significant figures, what is 2.5 cm × 3.42 cm?

1. A8.6 cm²
2. B8.550 cm²
3. C9 cm²
4. D8.55 cm²

Magnesium forms Mg²⁺ ions and oxygen forms O²⁻ ions. What is the formula of magnesium oxide?

1. AMg₂O₂
2. BMg₂O
3. CMgO₂
4. DMgO

Drops of water form on the outside of a glass of ice water. Where does this water come from?

1. AThe ice evaporates through the glass
2. BThe glass releases water when it gets cold
3. CWater vapour in the air condenses on the cold glass
4. DWater leaks through tiny holes in the glass

किसी विलयन का pH 6 से 4 हो जाता है। उसकी हाइड्रोजन आयन सांद्रता का क्या हुआ?

1. Aवह 100 गुना अधिक हो गई
2. Bवह 2 गुना अधिक हो गई
3. Cवह 100 गुना कम हो गई
4. Dवह 2 गुना कम हो गई

A small amount of acid is spilled on a lab bench. Why is a weak base such as sodium bicarbonate preferred over strong NaOH to neutralise it?

1. AExcess sodium bicarbonate is far less harmful than excess NaOH
2. BSodium bicarbonate makes the spilled acid evaporate
3. CSodium bicarbonate is a strong acid that cancels the spill
4. DNaOH does not react with acids at room temperature