Four arrangements to measure temperatur of ice in beaker with laboratory thermometer are shows in figure (a, b, c and d). Which one of them shows the correct arrangement for accurate measurement of temperature ?

Options

A.
B.
C.
D.

Answer

To determine which arrangement correctly measures the temperature of ice in a beaker using a laboratory thermometer, we need to analyze each option based on the following criteria:

1. The thermometer must be straight and not bent.
2. The bulb of the thermometer should not touch the bottom or sides of the beaker.
3. The bulb should be completely immersed in the ice.

Now, let's evaluate each option step by step:

### Step 1: Analyze Option A
- Check if the thermometer is straight.
- Check if the bulb touches the beaker.
- Check if the bulb is fully immersed in the ice.

**Evaluation**: If all conditions are met, this option is correct.

### Step 2: Analyze Option B
- Check if the thermometer is straight.
- Check if the bulb touches the beaker.
- Check if the bulb is fully immersed in the ice.

**Evaluation**: If the bulb touches the beaker or is not fully immersed, this option is incorrect.

### Step 3: Analyze Option C
- Check if the thermometer is straight.
- Check if the bulb touches the beaker.
- Check if the bulb is fully immersed in the ice.

**Evaluation**: If the bulb is not fully immersed, this option is incorrect.

### Step 4: Analyze Option D
- Check if the thermometer is straight.
- Check if the bulb touches the beaker.
- Check if the bulb is fully immersed in the ice.

**Evaluation**: If the thermometer is bent or not straight, this option is incorrect.

### Conclusion
After analyzing all options:
- **Option A** meets all criteria and is the correct arrangement for accurately measuring the temperature of ice in the beaker.

### Final Answer
The correct arrangement for accurate measurement of temperature is **Option A**.

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