उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

What is the melting point of a substance?

1. AThe temperature at which it catches fire
2. BThe temperature at which its liquid turns into a gas
3. CThe temperature at which its solid turns into a liquid
4. DThe temperature at which it dissolves in water

What is a single covalent bond?

1. AOne pair of electrons shared between two atoms
2. BTwo pairs of electrons shared between two atoms
3. COne electron transferred from one atom to another
4. DThe attraction between two oppositely charged ions

What does the double arrow (⇌) in a chemical equation show?

1. AThe reaction is reversible
2. BThe reaction needs a catalyst
3. CThe reaction is very fast
4. DThe reaction releases heat

What is the name of the compound CaCO₃?

1. ACalcium carbide
2. BCalcium carbonate
3. CCalcium oxide
4. DCarbon calcium trioxide

How does atomic radius change going down a group?

1. AIt decreases
2. BIt stays the same
3. CIt decreases, then increases
4. DIt increases

In the balanced equation __Mg + __HCl → __MgCl₂ + __H₂, what is the coefficient of HCl?

1. A2
2. B1
3. C4
4. D3

ग्लूकोज़, C₆H₁₂O₆, का मोलर द्रव्यमान क्या है (C = 12, H = 1, O = 16 g/mol)?

1. A168 g/mol
2. B180 g/mol
3. C96 g/mol
4. D29 g/mol

एक ही तत्व के दो समस्थानिक किस गुण में भिन्न होते हैं?

1. Aजिन रासायनिक अभिक्रियाओं में वे भाग लेते हैं
2. Bपरमाणु संख्या
3. Cद्रव्यमान संख्या
4. Dउदासीन परमाणु में इलेक्ट्रॉनों की संख्या