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. AAn electron
2. BA nucleus
3. CAn atom
4. DA proton

An instant cold pack feels cold when the substance inside dissolves. How is this dissolving process classified?

1. AA combustion reaction
2. BA neutralisation reaction
3. CExothermic
4. DEndothermic

Which unit is commonly used for the density of a liquid?

1. AmL/g
2. Bg/mL
3. Ckg
4. Dg·mL

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

1. AAcidosis
2. BAlkalosis
3. CNeutral
4. DNormal

How does an antacid tablet relieve heartburn caused by excess stomach acid?

1. AIt turns the acid into a gas that is absorbed
2. BA weak base in it neutralises some of the acid
3. CIt coats the stomach and stops all acid production
4. DAn acid in it lowers the stomach pH further

अभिक्रिया 2Mg + O₂ → 2MgO में कौन-सा पदार्थ ऑक्सीकृत होता है?

1. Aमैग्नीशियम, क्योंकि वह इलेक्ट्रॉन खोता है
2. Bमैग्नीशियम, क्योंकि वह इलेक्ट्रॉन ग्रहण करता है
3. Cऑक्सीजन, क्योंकि वह इलेक्ट्रॉन खोती है
4. Dकिसी भी पदार्थ का आवेश नहीं बदलता

For N₂ + 3H₂ → 2NH₃, 1 mol of N₂ is mixed with 2 mol of H₂. Which reactant is limiting?

1. AN₂, because there is less of it
2. BH₂, because 1 mol of N₂ would need 3 mol of H₂
3. CNeither, because both are used up exactly
4. DNH₃, because it is the product

Why does drinking seawater make dehydration worse?

1. ASeawater contains no water molecules the body can use
2. BSeawater is hypotonic, so water rushes into cells and makes them burst
3. CSeawater is isotonic, so it cannot be absorbed
4. DSeawater is hypertonic, so the body loses extra water getting rid of the salt