Question : Which of the following pair of compound - melting point is correct? l. Acetic acid - 290 K II. Ethanol - 156 K
Option 1: Only 1
Option 2: Both I and II
Option 3: Neither I nor II
Option 4: Only II
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Correct Answer: Both I and II
Solution : The correct option is Both I and II.
The melting point of acetic acid, sometimes referred to as ethanoic acid, is roughly 290 K, or 16.85°C. It is a carboxylic acid that is usually found at room temperature and pressure in a liquid state. It solidifies at 290 K when cooled. At roughly 156 K, ethanol—also referred to as ethyl alcohol or just alcohol—has a comparatively low melting point. That is the same as -117.3°C. One kind of alcohol is ethanol, which will solidify at this temperature after first being liquid.
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Question : Which of the following pair of compound's boiling points is correct?
I. Chloroform - 334K
II. Methane - 111K
Question : Which of the following statements is correct? I. If $K+\frac{1}{K}=12$, then ${K}^2+\frac{1}{K^2}=142$ II. The value of $({k}^2+\frac{1}{{k}^2})({k}-\frac{1}{{k}})({k}^4+\frac{1}{{k}^4})({k}+\frac{1}{{k}})$ is ${k}^{16}-\frac{1}{{k}^{16}}$
Question : Which of the following is a natural acid-base indicator?
I. Litmus
II. Turmeric
Question : Which of the following statement(s) is/are TRUE? I. $33^{3}>3^{33}$ II. $333>(3^{3})^{3}$
Question : Which of the following is a plant tissue?
I. Meristematic tissue
II. Permanent tissue
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