उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

What does organic chemistry study?

1. AOnly the noble gases
2. BOnly compounds found in plants
3. CCompounds based on carbon
4. DCompounds made of metals

Which method separates sand from water?

1. AFiltration
2. BChromatography
3. CEvaporation of the sand
4. DDistillation

What does the rule "like dissolves like" mean?

1. APolar solvents dissolve polar substances, and nonpolar solvents dissolve nonpolar ones
2. BSolids dissolve only in other solids
3. COnly substances with identical formulas can ever dissolve in each other
4. DEvery substance dissolves in water

15 g नमक और 135 g पानी से बने विलयन में नमक का द्रव्यमान प्रतिशत क्या है?

1. A15%
2. B11%
3. C90%
4. D10%

Which reacts more vigorously with water, potassium or sodium?

1. AThey react equally, because both are in group 1
2. BSodium, because it has fewer electron shells to shield its electron
3. CSodium, because its outer electron is farther from the nucleus
4. DPotassium, because its outer electron is farther from the nucleus

What is the shape of a water molecule?

1. ATetrahedral
2. BBent
3. CLinear
4. DFlat triangle

What is the correct name of Cu₂O?

1. ACopper(II) oxide
2. BCopper dioxide
3. CDicopper oxide
4. DCopper(I) oxide

Vitamin C is water-soluble and vitamin D is fat-soluble. What does this suggest about their molecules?

1. ABoth are equally polar
2. BVitamin C is nonpolar, while vitamin D is strongly polar
3. CBoth are ionic compounds
4. DVitamin C is polar, while vitamin D is mostly nonpolar