उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

परमाणु का कौन-सा कण धनावेशित होता है?

1. Aप्रोटॉन
2. Bन्यूट्रॉन
3. Cफ़ोटॉन
4. Dइलेक्ट्रॉन

What does the prefix "milli-" mean?

1. AOne thousand (10³)
2. BOne-millionth (10⁻⁶)
3. COne-thousandth (10⁻³)
4. DOne-hundredth (10⁻²)

What is a precipitate?

1. AA gas that bubbles out when two solutions are mixed
2. BA liquid that forms when a solid melts
3. CA substance that speeds up a reaction
4. DAn insoluble solid that forms when two solutions react

Which element has the most metallic character?

1. AChlorine (Cl)
2. BSodium (Na)
3. CAluminium (Al)
4. DCaesium (Cs)

Water has a high specific heat capacity. How does this help the human body?

1. AIt makes the blood more acidic
2. BIt helps keep body temperature stable
3. CIt allows oxygen to dissolve in water more easily
4. DIt makes water a poor solvent for salts

What is carbon-14 dating used for?

1. AFinding the exact age of rocks that are billions of years old
2. BMeasuring body temperature
3. CEstimating the age of material that was once alive
4. DDetecting carbon monoxide in a room

एक विलयन की हाइड्रोजन आयन सांद्रता 1 × 10⁻⁹ mol/L है। उसका pH क्या है, और वह अम्लीय है या क्षारीय?

1. ApH −9, अम्लीय
2. BpH 9, क्षारीय
3. CpH 5, अम्लीय
4. DpH 9, अम्लीय

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

1. A5
2. B10
3. C4
4. D3