Some of the properties of water are described below. Which of the is /are not correct ?

Options

A. Water is known to be a universal solvent
B. Hydorgen boding is present to a large extent in liquid water
C. There is no hydrogen bonding in the frozen state of water
D. Frozen water is heavier than liquid water

Explanation

To determine which properties of water are not correct, we will evaluate each statement one by one.

### Step 1: Evaluate the First Statement
**Statement:** Water is known to be a universal solvent.
**Evaluation:** This statement is correct. Water is often referred to as the "universal solvent" because it can dissolve a wide variety of substances, including salts, sugars, acids, and gases.

### Step 2: Evaluate the Second Statement
**Statement:** Hydrogen bonding is present to a large extent in liquid water.
**Evaluation:** This statement is also correct. In liquid water, hydrogen bonds form between the hydrogen atoms of one water molecule and the oxygen atom of another, leading to a significant amount of hydrogen bonding.

### Step 3: Evaluate the Third Statement
**Statement:** There is no hydrogen bonding in the frozen state of water.
**Evaluation:** This statement is incorrect. Hydrogen bonding does exist in the solid state of water (ice). In ice, water molecules are arranged in a crystalline structure, and hydrogen bonds are present, forming a network.

### Step 4: Evaluate the Fourth Statement
**Statement:** Frozen water is heavier than liquid water.
**Evaluation:** This statement is incorrect. Frozen water (ice) is less dense than liquid water, which is why ice floats. Therefore, frozen water is not heavier; it is lighter.

### Conclusion
After evaluating all the statements, we find that the third and fourth statements are not correct.

**Final Answer:** The statements that are not correct are the third and fourth statements.

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