उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

What does organic chemistry study?

1. ACompounds based on carbon
2. BOnly compounds found in plants
3. CCompounds made of metals
4. DOnly the noble gases

इनमें से कौन-सा भौतिक परिवर्तन है?

1. Aब्रेड का भूरा होने तक सेंका जाना
2. Bपानी का उबलकर भाप बनना
3. Cलोहे में जंग लगना
4. Dदूध का खट्टा होना

A blown-up balloon is put in a freezer. What happens to its volume?

1. AIt stays exactly the same
2. BIt increases
3. CIt decreases
4. DThe balloon bursts

0.5 mol of KCl is dissolved to make 250 mL of solution. What is its molarity?

1. A2 M
2. B0.125 M
3. C0.5 M
4. D125 M

How does evaporation differ from boiling?

1. AEvaporation produces a solid, while boiling produces a gas
2. BEvaporation happens throughout the liquid at a set temperature; boiling happens only at the surface
3. CEvaporation happens only at the surface and at any temperature; boiling happens throughout the liquid at a set temperature
4. DEvaporation needs a higher temperature than boiling

मीथेन जैसे हाइड्रोकार्बन के पूर्ण दहन के उत्पाद क्या हैं?

1. Aकार्बन डाइऑक्साइड और पानी
2. Bकार्बन और हाइड्रोजन गैस
3. Cऑक्सीजन और पानी
4. Dकार्बन मोनोऑक्साइड और हाइड्रोजन

Element A has 1 valence electron and element B has 7 valence electrons, both in period 3. Which statement best compares them?

1. ABoth are unreactive because they are in the same period
2. BBoth are metalloids
3. CA is a reactive metal and B is a reactive nonmetal
4. DA is a nonmetal and B is a metal

CO₂ in blood forms carbonic acid: CO₂ + H₂O ⇌ H₂CO₃ ⇌ H⁺ + HCO₃⁻. An anxious patient hyperventilates and breathes off extra CO₂. What happens to blood pH?

1. AIt rises, because less CO₂ means fewer H⁺ ions
2. BIt falls, because oxygen is an acid
3. CIt stays exactly 7.40, because CO₂ does not affect pH
4. DIt falls, because less CO₂ means more H⁺ ions