The correct answer is C. Colligative properties only depend upon the number of solute particles in a solution but not on the identity or nature of the solute and solvent particles. I hope this anwers your question.
Answer:
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Phenol reacts with dilute nitric acid at room temperature to give a mixture of 2-nitrophenol and 4-nitrophenol while with concentrated nitric acid, more nitro groups get substituted on the ring to give 2,4,6-trinitrophenol which is known as picric acid.
The four satellites are needed to determine the location of an object using a GPS receiver.
<u>Option: </u>B
<u>Explanation:</u>
A GPS receiver specifically calculates the different speed of light (299,792 km / s) variations in the signals arriving from 4 or more satellites to determine the location of Longitude, Latitude and Highness.
There is requirement of four satellites, since each satellite data brings around the satellite in a sphere. You can limit the considerations down to a single point by programming the crossings. The collision of three satellites positions you on two possible points. The last satellite shows you exactly where you are.
The first one is the answer