उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

A blown-up balloon is put in a freezer. What happens to its volume?

1. AIt stays exactly the same
2. BIt decreases
3. CIt increases
4. DThe balloon bursts

Which element exists naturally as diatomic molecules (two atoms joined together)?

1. AOxygen
2. BIron
3. CHelium
4. DSodium

हीलियम और निऑन जैसी उत्कृष्ट गैसें किस समूह में हैं?

1. Aसमूह 1
2. Bसमूह 18
3. Cसमूह 17
4. Dसमूह 2

Why can a very high fever disrupt the body's chemical reactions?

1. AHigh temperatures turn enzymes into fats
2. BHigh temperatures make every enzyme work faster without any limit
3. CHigh temperatures can change the shape of enzymes so they stop working
4. DHigh temperatures remove the water from blood

When mercury(II) oxide is heated, it reacts as 2HgO → 2Hg + O₂. What type of reaction is this?

1. ASynthesis
2. BDecomposition
3. CSingle replacement
4. DCombustion

What is the mass of 0.5 mol of NaCl (molar mass 58.5 g/mol)?

1. A0.5 g
2. B29.25 g
3. C58.5 g
4. D117 g

एक विलयन की हाइड्रोजन आयन सांद्रता 1 × 10⁻⁹ mol/L है। उसका pH क्या है, और वह अम्लीय है या क्षारीय?

1. ApH 5, अम्लीय
2. BpH 9, क्षारीय
3. CpH −9, अम्लीय
4. DpH 9, अम्लीय

Starch and cellulose are both made entirely of glucose units, yet humans can digest starch but not cellulose. Why?

1. ACellulose is really made of amino acids, not glucose, so stomach acid cannot break it
2. BStarch contains nitrogen, which makes it easier to digest
3. CCellulose dissolves in water, so it is lost from the gut
4. DThe glucose units are linked differently, and humans lack an enzyme to break cellulose's links