उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

सोडियम क्लोराइड (खाने का नमक) को कौन-सा आबंध साथ बाँधे रखता है?

1. Aहाइड्रोजन आबंधन
2. Bसहसंयोजी आबंधन
3. Cआयनिक आबंधन
4. Dधात्विक आबंधन

What is the change from a gas directly to a solid, skipping the liquid state, called?

1. ACondensation
2. BSublimation
3. CFreezing
4. DDeposition

In a chemical equation, what does the symbol (aq) after a formula mean?

1. AA solid
2. BA pure liquid
3. CDissolved in water
4. DA gas

How many oxygen atoms are in one formula unit of calcium nitrate, Ca(NO₃)₂?

1. A3
2. B2
3. C6
4. D5

Using significant figures, what is 2.5 cm × 3.42 cm?

1. A8.550 cm²
2. B8.55 cm²
3. C8.6 cm²
4. D9 cm²

A solution has a pH of 10. What is its pOH at 25 °C?

1. A14
2. B24
3. C10
4. D4

A mixture contains sand, salt and water. Which sequence separates all three?

1. AEvaporate all the water first, then filter the salt away from the dry sand
2. BFilter to remove the sand, then distil the filtrate to collect water and leave salt
3. CUse a magnet to remove the salt, then filter the sand
4. DDistil first to remove the sand, then filter out the salt

How many grams of NaCl are in 250 mL of 0.9% (w/v) normal saline?

1. A9 g
2. B22.5 g
3. C2.25 g
4. D0.9 g