Before X-ray examination (coloured X-ray) of the stomach, patients are given suitable salt of barium because

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Q: 50 (CDS-I/2012)
Before X-ray examination (coloured X-ray) of the stomach, patients are given suitable salt of barium because—

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,48,27,21,48,0,6

keywords: 

{'barium salts': [0, 1, 0, 1], 'barium': [1, 1, 1, 2], 'suitable salt': [0, 0, 0, 1], 'stomach': [0, 0, 1, 1], 'good absorber': [0, 1, 1, 1], 'colour': [11, 6, 13, 28]}

The correct answer is option 2: barium is a good absorber of X-rays and helps the stomach to appear clearly in X-ray examinations.

Option 1 is incorrect because barium salts being white in color does not directly contribute to the stomach appearing clearly in X-ray examinations. The white color of barium salts is not relevant in this context.

Option 3 is irrelevant because the availability of barium salts is not the reason they are used in X-ray examinations of the stomach.

Option 4 is incorrect. If barium allowed X-rays to pass through the stomach, it would not be useful for making the stomach appear clearly in X-ray images. In fact, barium absorbs X-rays effectively, which is why it is used in these examinations.

In summary, barium salts are used in X-ray examinations of the stomach because they are good absorbers of X-rays, allowing for a clear visualization of the stomach on the X-ray images.