उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

In a chemical equation, what are the reactants?

1. AThe catalysts written above the arrow
2. BThe numbers written in front of each formula
3. CThe starting substances, written to the left of the arrow
4. DThe new substances formed, written to the right of the arrow

Between which kinds of elements do ionic bonds usually form?

1. ATwo identical metals
2. BTwo noble gases
3. CTwo nonmetals
4. DA metal and a nonmetal

What is the change from a gas to a liquid called?

1. AEvaporation
2. BSublimation
3. CFreezing
4. DCondensation

Which equation shows a combustion reaction?

1. AC₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
2. BCaCO₃ → CaO + CO₂
3. CZn + CuSO₄ → ZnSO₄ + Cu
4. DNaOH + HCl → NaCl + H₂O

Which bond joins amino acids together in a protein?

1. AA glycosidic bond
2. BA peptide bond
3. CAn ionic bond
4. DA hydrogen bond

How can you get solid salt back from salt water?

1. AFilter the solution
2. BUse a magnet
3. CEvaporate the water
4. DFreeze the solution and lift out the salt

एक तत्व का इलेक्ट्रॉन विन्यास 2, 8, 7 है। वह सबसे संभावित रूप से कौन-सा आयन बनाएगा?

1. A2− आयन
2. B1+ आयन
3. C1− आयन
4. D7+ आयन

What is the formula of calcium phosphate, made from Ca²⁺ and PO₄³⁻ ions?

1. ACa₃(PO₄)₂
2. BCa₂(PO₄)₃
3. CCa₃PO₄
4. DCaPO₄