उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

Which quantity is the same for 1 mole of any substance?

1. AThe number of particles
2. BThe mass in grams
3. CThe volume as a liquid
4. DThe number of atoms per molecule

Which two substances must be present for iron to rust?

1. AOxygen and water
2. BNitrogen and water
3. CCarbon dioxide and salt
4. DHydrogen and oxygen gas only

इनमें से कौन-सा यौगिक है?

1. Aकार्बन डाइऑक्साइड (CO₂)
2. Bहीलियम (He)
3. Cलोहा (Fe)
4. Dऑक्सीजन गैस (O₂)

A patient's arterial blood pH is 7.25. How is this described?

1. ANeutral
2. BAcidosis
3. CNormal
4. DAlkalosis

50 g द्रव्यमान और 20 cm³ आयतन वाली वस्तु का घनत्व क्या है?

1. A70 g/cm³
2. B0.4 g/cm³
3. C1000 g/cm³
4. D2.5 g/cm³

What is a polymer?

1. AA large molecule built from many repeating smaller units called monomers
2. BA small molecule containing only two atoms of one element
3. CAn ion with more than one charge
4. DA mixture of several different elements

Steel can be protected from rusting by coating it with zinc (galvanising). Why does the steel stay protected even if the zinc coating is scratched?

1. AZinc is more reactive than iron, so it corrodes instead of the iron
2. BZinc turns the iron into a noble metal
3. CZinc absorbs all the water from the air
4. DZinc is less reactive than iron, so it pushes oxygen and water away from the iron

Ethene has the structure H₂C=CH₂. How many electrons are shared between the two carbon atoms?

1. A8
2. B4
3. C6
4. D2