उत्तरों सहित नर्सिंग प्रवेश परीक्षाओं के लिए रसायन विज्ञान वर्कशीट

What is the formula of methane, the main gas in natural gas?

1. ACH₄
2. BC₂H₆
3. CCH₂
4. DCO₂

What causes the pressure of a gas in a container?

1. AThe weight of the container pressing on the gas inside
2. BGas particles sticking to the walls
3. CGas particles colliding with the container walls
4. DGas particles stopping and pushing outward

What colour does blue litmus paper turn in an acid?

1. ARed
2. BPurple
3. CGreen
4. DBlue (no change)

What is the molar mass of sulfuric acid, H₂SO₄ (H = 1, S = 32, O = 16 g/mol)?

1. A50 g/mol
2. B98 g/mol
3. C96 g/mol
4. D49 g/mol

In the balanced equation __Mg + __HCl → __MgCl₂ + __H₂, what is the coefficient of HCl?

1. A2
2. B1
3. C4
4. D3

When the diaphragm contracts and the chest cavity gets bigger, what happens to the air pressure inside the lungs?

1. AIt rises, so air flows in
2. BIt does not change
3. CIt falls, so air flows out
4. DIt falls, so air flows in

Methane burns as CH₄ + 2O₂ → CO₂ + 2H₂O. What mass of CO₂ (44 g/mol) forms from 16 g of CH₄ (16 g/mol)?

1. A44 g
2. B88 g
3. C16 g
4. D22 g

Why does a burn from steam at 100 °C usually cause more damage than one from liquid water at 100 °C?

1. ALiquid water cannot pass any of its heat to the skin
2. BSteam releases a large amount of extra energy as it condenses on the skin
3. CSteam particles are hotter than water particles at the same reading
4. DSteam carries dissolved acid that damages the skin