Microcosmic salt is

Options

A. `Na(NH_(4))HPO_(4).4H_(2)O`
B. `Na(NH_(4)).H_(2)O`
C. `Na(NH_(3))HPO_(4).4H_(2)O`
D. `K(NH_(4))HPO_(4).2H_(2)O`

Answer

To solve the question "Microcosmic salt is," we can follow these steps:

### Step 1: Understand what Microcosmic Salt is
Microcosmic salt is a chemical compound that is often found in urine. It is a residue left after the extraction of urea from dried urine.

**Hint:** Microcosmic salt is related to the residues found in biological fluids.

### Step 2: Identify its chemical composition
The chemical formula of microcosmic salt is NaNH4HPO4·4H2O. This indicates that it contains sodium (Na), ammonium (NH4), hydrogen phosphate (HPO4), and water of crystallization (4H2O).

**Hint:** Look for the elements and their arrangement in the formula to understand its composition.

### Step 3: Recognize its common name
Microcosmic salt is also known as sodium ammonium hydrogen phosphate. This name reflects the presence of sodium, ammonium, and phosphate ions in its structure.

**Hint:** Common names often provide insight into the components of the compound.

### Step 4: Confirm the correct option
If presented with multiple-choice options, the correct answer would be the one that matches the description and formula of microcosmic salt, which is the first option.

**Hint:** Always cross-check the options with the known facts about the compound.

### Final Answer
Microcosmic salt is sodium ammonium hydrogen phosphate with the formula NaNH4HPO4·4H2O.

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