उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

What do the letters STP stand for in gas chemistry?

1. AStandard time and pressure
2. BStandard temperature and pressure
3. CSpecific temperature and particles
4. DStable temperature point

What is the formula of methane, the main gas in natural gas?

1. ACH₄
2. BCH₂
3. CCO₂
4. DC₂H₆

समुद्र तल पर शुद्ध पानी किस तापमान पर उबलता है?

1. A0 °C (32 °F)
2. B50 °C (122 °F)
3. C37 °C (98.6 °F)
4. D100 °C (212 °F)

Which gas forms when hydrochloric acid reacts with calcium carbonate?

1. AHydrogen
2. BOxygen
3. CCarbon dioxide
4. DChlorine

तापमान बढ़ाने का अभिक्रिया की दर पर सामान्यतः क्या प्रभाव पड़ता है?

1. Aअभिक्रिया पूरी तरह रुक जाती है
2. Bदर बढ़ती है
3. Cदर घटती है
4. Dदर पर कोई प्रभाव नहीं पड़ता

Water climbs up a narrow glass tube. Which property mainly causes this?

1. AEvaporation of water from the tube
2. BLow density of water
3. CAdhesion of water to the glass
4. DWater's high boiling point

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. AHypertonic; water tends to move out of the cells, which shrink
2. BHypotonic; water tends to move into the cells, which swell
3. CIsotonic; water moves equally in and out, so the cells keep their shape
4. DHypertonic; salt moves into the cells, which then swell

At room temperature chlorine (Cl₂) is a gas, bromine (Br₂) is a liquid and iodine (I₂) is a solid. What best explains this trend?

1. AIodine forms hydrogen bonds but chlorine does not
2. BChlorine is ionic, while iodine is metallic
3. CThe covalent bond in I₂ is much stronger than in Cl₂
4. DLarger molecules with more electrons have stronger dispersion forces