उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

What is an element?

1. AA substance made of only one kind of atom
2. BA physical mixture of different substances
3. CA substance of two or more elements chemically bonded together
4. DA particle with an electric charge

How many millilitres are in 1 litre?

1. A10,000
2. B100
3. C1000
4. D10

Which group of biological molecules includes fats, oils and cholesterol?

1. ALipids
2. BCarbohydrates
3. CProteins
4. DNucleic acids

A red blood cell is placed in pure water (a hypotonic solution). What happens?

1. ASalt enters the cell, which shrinks
2. BWater enters the cell, which swells and may burst
3. CWater leaves the cell, which shrinks and wrinkles
4. DNothing happens to the cell

According to the Brønsted–Lowry definition, what is an acid?

1. AAn electron pair donor
2. BA proton (H⁺) acceptor
3. CA hydroxide ion donor
4. DA proton (H⁺) donor

What is the name of the compound CaCO₃?

1. ACalcium carbonate
2. BCarbon calcium trioxide
3. CCalcium oxide
4. DCalcium carbide

A reaction should produce 2 mol of a product with a molar mass of 30 g/mol, but only 48 g is collected. What is the percent yield?

1. A48%
2. B80%
3. C60%
4. D125%

Methane (CH₄) has four bonding pairs and no lone pairs on carbon. What is its shape?

1. ATrigonal pyramidal
2. BBent
3. CTetrahedral
4. DSquare planar