Solve this multiple-choice question and choose the correct option.

Home » General Knowledge » General Science

Solutions (solubility): Which of the following substances is the most soluble in water at room temperature? Compare typical solubilities of common salts. Choose the correct substance.

Difficulty: Easy

Ammonium nitrate (NH₄NO₃)
Potassium nitrate (KNO₃)
Sodium chloride (NaCl)
Calcium carbonate (CaCO₃)

Correct Answer: Ammonium nitrate (NH₄NO₃)

Explanation:

Given data

Ask: Most water-soluble substance among common salts.

Concept/Approach At ~20–25 °C, ammonium nitrate has an exceptionally high solubility (well over 100 g per 100 g water), higher than KNO₃ (~30–35 g/100 g water) and NaCl (~36 g/100 g water). CaCO₃ is sparingly soluble.

Final Answer Ammonium nitrate (NH₄NO₃)

← Previous Question Next Question→

More Questions from General Science

Solar spectroscopy (history of discovery): Which element was first discovered in the Sun’s chromosphere before being found on Earth? Identify the element detected during the 1868 total solar eclipse via a new spectral line. Choose the correct element.
Everyday chemistry: Soda water contains which dissolved gas under pressure? Focus on the fizzy constituent responsible for effervescence and tangy taste. Choose the correct gas.
Atomic structure (hydrogen): Which of the following is NOT an isotope of hydrogen? Recall the three isotopes of hydrogen and identify the odd one out. Choose the correct option.
Materials used in pencils: The writing core of ordinary pencils is made of which substance? Consider the soft, electrically conductive carbon form used for marking on paper. Choose the correct material.
Bioinorganic chemistry: Chlorophyll is a naturally occurring chelate in which the central metal ion is what? Identify the metal coordinated in the porphyrin-like ring of plant chlorophyll. Choose the correct metal.
Elemental classification: Bromine is best described as which of the following at room temperature? Consider both physical state and its classification in the periodic table. Choose the correct description.
Physical chemistry (water types): Heavy water is chemically what? Identify the correct formula/name used in nuclear reactors as a moderator. Choose the correct compound.
Water treatment (hardness): Permanent hardness of water can be removed by adding which chemical? Target the sulfate/chloride salts of Ca/Mg (non-carbonate hardness). Choose the correct reagent.
Allotropy of carbon: Carbon, diamond, and graphite are collectively referred to as what? Identify the term for different structural forms of the same element. Choose the correct term.
Corrosion/tarnish of alloys: Brass gets discoloured in air due to the presence of which gas? Identify the gas that reacts with copper in brass to form a dark sulfide film. Choose the correct gas.

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion