Question

Methanol is a Liquid form if its temperature is between - 93.9 C and 64.96 C At what temperatures will methanol be in liquid form? choose all the correct answers .

25 C , -95 C, - 43 C, 67 C, 0 C, 89 C

Answer 1

Option A : 25° C

Option C : -43° C

Option E : 0° C

Explanation:

It is given that the Methanol is in liquid form if its temperature is between -93.9°C and 64.96°C.

Let x represents the Methanol's temperature. Writing the temperature in interval notation, we have,

$-93.9<x<64.96$

Now, let us determine from the given options that the temperatures at what are all the temperatures the methanol will be in liquid form.

Option A: 25° C

It is obvious that the 25° C lies in the interval $-93.9<x<64.96$

Hence, at 25° C Methanol will be in liquid form.

Thus, Option A is the correct answer.

Option B: -95° C

We can see that the temperature -95° C does not lie in the interval $-93.9<x<64.96$

Hence, at -95° C Methanol will not be in liquid form.

Thus, Option B is not the correct answer.

Option C: -43° C

We can see that the temperature -43° C lies in the interval $-93.9<x<64.96$

Hence, at -43° C Methanol will be in liquid form.

Thus, Option C is the correct answer.

Option D: 67° C

We can see that the temperature 67° C does not lie in the interval $-93.9<x<64.96$

Hence, at 67° C Methanol will not be in liquid form.

Thus, Option D is not the correct answer.

Option E: 0° C

We can see that the temperature 0° C lies in the interval $-93.9<x<64.96$

Hence, at 0° C Methanol will be in liquid form.

Thus, Option E is the correct answer.

Option F: 89° C

We can see that the temperature 89° C does not lie in the interval $-93.9<x<64.96$

Hence, at 89° C Methanol will not be in liquid form.

Thus, Option F is not the correct answer.

Answer 2

Methanol be in liquid form at temperature of  25°C , -43°C and 0°C.

Since, given that Methanol be in liquid form if its temperature is between - -93.9°C and 64.96°C.

So, all temperature values lies between  -93.9°C and 64.96°C , Methanol will be in liquid form.

25°C  lies between range.

-95°C  not lies in range.

-43°C  lies between range.

0°C  lies between range.

89°C  not lies between range.

Therefore, Methanol be in liquid form at temperature of  25°C , -43°C and 0°C.

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