उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

नमकीन पानी किस प्रकार के पदार्थ का उदाहरण है?

1. Aशुद्ध तत्व
2. Bविषमांगी मिश्रण
3. Cसमांगी मिश्रण (विलयन)
4. Dयौगिक

Which of these is a polyatomic ion?

1. ASulfate, SO₄²⁻
2. BOxide, O²⁻
3. CSodium, Na⁺
4. DChloride, Cl⁻

Which state of matter has neither a fixed shape nor a fixed volume?

1. ACrystal
2. BGas
3. CSolid
4. DLiquid

Which element has chemical properties most similar to calcium?

1. APotassium
2. BMagnesium
3. CCarbon
4. DScandium

Nitric acid (HNO₃) reacts with potassium hydroxide (KOH). Which salt forms?

1. APotassium nitrite, KNO₂
2. BPotassium hydride, KH
3. CNitrogen hydroxide, NOH
4. DPotassium nitrate, KNO₃

How can you get solid salt back from salt water?

1. AFreeze the solution and lift out the salt
2. BEvaporate the water
3. CFilter the solution
4. DUse a magnet

ग्लूकोज़, C₆H₁₂O₆, का मोलर द्रव्यमान क्या है (C = 12, H = 1, O = 16 g/mol)?

1. A180 g/mol
2. B168 g/mol
3. C29 g/mol
4. D96 g/mol

Half-normal saline (0.45% NaCl) is compared with blood plasma, which has about the same concentration as 0.9% NaCl. How is 0.45% NaCl described, and what happens to red blood cells placed in it?

1. AIsotonic; water moves equally in and out, so the cells keep their shape
2. BHypertonic; water tends to move out of the cells, which shrink
3. CHypertonic; salt moves into the cells, which then swell
4. DHypotonic; water tends to move into the cells, which swell