उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

What is the smallest particle of an element that still has the chemical properties of that element?

1. AA nucleus
2. BAn electron
3. CA proton
4. DAn atom

What are enzymes?

1. AMinerals that build bone
2. BSugars that store energy in the liver
3. CFats that form most of the cell membrane
4. DBiological catalysts, usually proteins

What is an element?

1. AA substance made of only one kind of atom
2. BA substance of two or more elements chemically bonded together
3. CA particle with an electric charge
4. DA physical mixture of different substances

A reaction has ΔH = −890 kJ/mol. What does the negative sign tell you?

1. AThe reaction is at equilibrium
2. BThe reaction is endothermic
3. CThe reaction is exothermic
4. DThe reaction needs a catalyst

क्लोरीन-37 के परमाणु में 17 प्रोटॉन हैं। उसमें कितने न्यूट्रॉन हैं?

1. A17
2. B20
3. C54
4. D37

What is the normal boiling point of a liquid?

1. AThe temperature at which it first starts to evaporate
2. BThe temperature at which its density is greatest
3. CThe temperature at which its particles stop moving
4. DThe temperature at which its vapour pressure equals 1 atmosphere

अभिक्रिया CuO + H₂ → Cu + H₂O में कौन-सा पदार्थ अपचयित होता है?

1. Aपानी, क्योंकि वह बनता है
2. Bकॉपर ऑक्साइड, क्योंकि तांबा इलेक्ट्रॉन ग्रहण करता है
3. Cहाइड्रोजन, क्योंकि वह ऑक्सीजन ग्रहण करती है
4. Dतांबा, क्योंकि वह इलेक्ट्रॉन खोता है

Methane burns as CH₄ + 2O₂ → CO₂ + 2H₂O. What mass of CO₂ (44 g/mol) forms from 16 g of CH₄ (16 g/mol)?

1. A88 g
2. B44 g
3. C22 g
4. D16 g