One of the constituents of baking powder is sodium hydrogen carbonate the other constituent is

Options

A. hydrochloric acid
B. tartaric acid
C. acetic acid
D. sulphuric acid

Explanation

To solve the question regarding the constituents of baking powder, we can follow these steps:

### Step 1: Identify the known constituent
We know that one of the constituents of baking powder is sodium hydrogen carbonate, which is also known as baking soda (NaHCO3).

### Step 2: Understand the role of baking powder
Baking powder is a leavening agent used in baking. It helps dough rise by producing carbon dioxide gas when it reacts with moisture and heat.

### Step 3: Identify the other constituent
Baking powder typically contains a mild edible acid that reacts with sodium hydrogen carbonate. The most common acid used in baking powder is tartaric acid.

### Step 4: Describe the reaction
When water is added to baking powder, sodium hydrogen carbonate reacts with tartaric acid. This reaction produces carbon dioxide gas, which causes the dough or batter to rise.

### Step 5: Conclude the answer
The other constituent of baking powder, along with sodium hydrogen carbonate, is tartaric acid.

### Final Answer
The other constituent of baking powder is tartaric acid.

---