उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

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

1. ASolid
2. BLiquid
3. CGas
4. DPlasma

Which two substances must be present for iron to rust?

1. ACarbon dioxide and salt
2. BHydrogen and oxygen gas only
3. COxygen and water
4. DNitrogen and water

इनमें से कौन-सा रासायनिक परिवर्तन है?

1. Aलकड़ी का जलना
2. Bकाँच का टूटना
3. Cचाय में चीनी का घुलना
4. Dबर्फ़ का पिघलना

What is the oxidation number of an element in its uncombined (elemental) form, such as Fe or O₂?

1. A−1
2. BIt equals the group number
3. C0
4. D+1

Which equation shows a combustion reaction?

1. AZn + CuSO₄ → ZnSO₄ + Cu
2. BC₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
3. CCaCO₃ → CaO + CO₂
4. DNaOH + HCl → NaCl + H₂O

0.5 mol of KCl is dissolved to make 250 mL of solution. What is its molarity?

1. A2 M
2. B0.5 M
3. C0.125 M
4. D125 M

समीकरण __C₃H₈ + __O₂ → __CO₂ + __H₂O को संतुलित कीजिए। O₂ का गुणांक क्या है?

1. A5
2. B4
3. C3
4. D10

At the top of a high mountain, air still contains about 21% oxygen. Why do climbers still get less oxygen with each breath?

1. ACold air contains no oxygen
2. BThe total air pressure is lower, so the partial pressure of oxygen is lower
3. COxygen is heavier, so it all sinks to sea level
4. DThe percentage of oxygen in the air falls sharply as you climb higher