उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

किस तत्व का प्रतीक K है?

1. Aपोटैशियम
2. Bकार्बन
3. Cकैल्शियम
4. Dक्रिप्टॉन

What is the name for the attraction of water molecules to each other?

1. AOsmosis
2. BCohesion
3. CDiffusion
4. DAdhesion

Which property is typical of bases?

1. AThey taste sour
2. BThey turn blue litmus red
3. CThey feel slippery
4. DThey have a pH below 7

पानी का मोलर द्रव्यमान क्या है (H = 1 g/mol, O = 16 g/mol)?

1. A10 g/mol
2. B18 g/mol
3. C17 g/mol
4. D32 g/mol

Which of these is a colloid?

1. APure water
2. BSand in water
3. CSalt water
4. DMilk

What is a polymer?

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

Each C=O bond in carbon dioxide is polar, yet the CO₂ molecule is nonpolar. Why?

1. AThe molecule is linear, so the two bond dipoles cancel out
2. BCarbon and oxygen have the same electronegativity
3. CCarbon has lone pairs that cancel the dipoles
4. DThe bonds are ionic, not covalent

Why is gamma radiation used to sterilise sealed medical supplies such as syringes?

1. AIt passes through the packaging and kills microbes without making the items radioactive
2. BIt heats the items to very high temperatures, so the microbes are burned away inside the pack
3. CIt is stopped by the packaging, so it only cleans the outside
4. DIt adds a protective chemical coating to the items