उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

Which method separates two liquids with different boiling points, such as alcohol and water?

1. ASieving
2. BUsing a magnet
3. CDistillation
4. DFiltration

एक उदासीन परमाणु में 11 प्रोटॉन हैं। उसमें कितने इलेक्ट्रॉन हैं?

1. A12
2. B10
3. C11
4. D22

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 movement of water across a semipermeable membrane
4. DThe breaking of a solid into ions

एक मैग्नीशियम परमाणु दो इलेक्ट्रॉन खो देता है। बनने वाला आयन कौन-सा है?

1. AMg²⁻
2. BMg²⁺
3. CMg⁻
4. DMg⁺

How much heat is needed to raise the temperature of 100 g of water by 10 °C (specific heat of water = 4.18 J/g·°C)?

1. A418 J
2. B41,800 J
3. C4180 J
4. D41.8 J

A student tests how temperature affects the rate of a reaction. What is the independent variable?

1. AThe volume of acid, which is kept the same
2. BThe temperature
3. CThe reaction rate
4. DThe type of beaker used

How many atoms in total are in 0.5 mol of water, H₂O?

1. A9.03 × 10²³
2. B3.01 × 10²³
3. C6.02 × 10²³
4. D1.81 × 10²⁴

A sealed bag of crisps (potato chips) packed at sea level looks puffed up when it is carried to a high mountain. Why?

1. AThe bag becomes thinner and weaker at altitude
2. BMore gas is produced by the crisps at altitude
3. CThe outside air pressure is lower, so the gas inside expands
4. DThe gas inside the bag is heated strongly by the mountain sunlight