उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

What does the rate of a reaction measure?

1. AHow hot the reaction gets
2. BHow quickly reactants are used up or products are formed
3. CHow much energy the final products contain
4. DHow much product forms in total by the end

ठोस से सीधे गैस में परिवर्तन को क्या कहते हैं?

1. Aसंघनन
2. Bगलन
3. Cऊर्ध्वपातन (सब्लिमेशन)
4. Dनिक्षेपण (डिपॉज़िशन)

संतुलित रासायनिक समीकरण क्या दर्शाता है?

1. Aअभिकारकों से अधिक उत्पाद
2. Bअभिक्रिया के केवल अभिकारक
3. Cदोनों ओर प्रत्येक प्रकार के परमाणुओं की संख्या समान
4. Dतीर के दोनों ओर, पहले और बाद में, अणुओं की संख्या समान

Water has a high specific heat capacity. How does this help the human body?

1. AIt makes the blood more acidic
2. BIt makes water a poor solvent for salts
3. CIt allows oxygen to dissolve in water more easily
4. DIt helps keep body temperature stable

कौन-से गुणांक समीकरण __H₂ + __O₂ → __H₂O को संतुलित करते हैं?

1. A2, 1, 2
2. B1, 1, 1
3. C1, 2, 1
4. D2, 2, 2

What feature makes a hydrocarbon an alkene?

1. AA ring of six carbon atoms with no hydrogen
2. BOnly carbon–carbon single bonds
3. CAt least one carbon–carbon double bond
4. DAn –OH group

Pepsin digests protein in the stomach at about pH 2, but it stops working once food moves into the small intestine, where the pH is higher. Why?

1. AThe small intestine is too cold for any enzyme
2. BThe change in pH alters the shape of pepsin's active site
3. CPepsin is used up completely in the stomach, just like a reactant
4. DPepsin only works on fats in the small intestine

Hyperbaric oxygen therapy places a patient in a chamber with oxygen at higher than normal pressure. Why does this raise the oxygen dissolved in blood plasma?

1. AHigher pressure lowers body temperature, so the blood can hold much more gas
2. BGas solubility in a liquid increases with the partial pressure of the gas
3. CHigher pressure turns the oxygen into a liquid
4. DHigher pressure makes red blood cells divide faster