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NEET UG Solutions — practice questions

Explore 125 free Solutions questions in NEET UG Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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If sea water (density 1.03 g mL⁻¹) contains 5.8 g of dissolved O₂ per 10⁶ g of water, the concentration is best expressed as:Read the answer and worked solution →The MOLARITY of a solution containing 58.5 g NaCl dissolved in 1 L of solution is:Read the answer and worked solution →HENRY'S LAW states that at constant temperature:Read the answer and worked solution →A MINIMUM-BOILING azeotrope arises from:Read the answer and worked solution →Which of these is NOT a colligative property?Read the answer and worked solution →Salt is sprinkled on icy roads in cold countries to:Read the answer and worked solution →The van't Hoff factor (i) for sodium chloride (NaCl) in water is approximately:Read the answer and worked solution →NEET · Chemistry · Colligative PropertiesRead the answer and worked solution →Catch the colligative propertiesRead the answer and worked solution →Sort solutions by their solvent stateRead the answer and worked solution →Knock out the azeotrope mythsRead the answer and worked solution →Complete the two concentration definitionsRead the answer and worked solution →Molarity or molality?Read the answer and worked solution →True or false: concentrationRead the answer and worked solution →Naming the measureRead the answer and worked solution →Complete the meaning of colligativeRead the answer and worked solution →True or false: colligative propertiesRead the answer and worked solution →Tap every statement true of molalityRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Flip and pair: measure with its denominatorRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Which description correctly defines a solution in chemistry?Read the answer and worked solution →Which component of a solution determines the physical state in which the solution exists?Read the answer and worked solution →A solution of hydrogen in palladium belongs to which solute-in-solvent type?Read the answer and worked solution →German silver is a mixture of which metals?Read the answer and worked solution →Fluoride ions in drinking water at about which level cause teeth to become mottled?Read the answer and worked solution →A solution labelled 10% glucose in water by mass is made from what?Read the answer and worked solution →A solute present only in trace amounts is most conveniently expressed in which unit?Read the answer and worked solution →

Worked practice questions

If sea water (density 1.03 g mL⁻¹) contains 5.8 g of dissolved O₂ per 10⁶ g of water, the concentration is best expressed as:

  1. 5.8 M
  2. 5.8% by mass
  3. 5.8 ppm
  4. 5.8 ppb
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Correct answer: C. 5.8 ppm

Trace concentrations are expressed in **parts per million (ppm) = (mass of component / total mass) × 10⁶**. 5.8 g per 10⁶ g = **5.8 ppm**.

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The MOLARITY of a solution containing 58.5 g NaCl dissolved in 1 L of solution is:

  1. $1$ M
  2. $0.5$ M
  3. $2$ M
  4. $58.5$ M
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Correct answer: A. $1$ M

NaCl molar mass = 58.5 g/mol. So 58.5 g = 1 mole. 1 mole in 1 L = 1 M. Molarity = moles solute / litre solution.

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HENRY'S LAW states that at constant temperature:

  1. Gas solubility is directly proportional to gas pressure
  2. Gas pressure is inversely proportional to volume
  3. Vapour pressure is proportional to mole fraction
  4. Boiling point is proportional to molality
Show answer and solution

Correct answer: A. Gas solubility is directly proportional to gas pressure

**HENRY'S LAW:** at constant T, gas solubility in a liquid ∝ pressure of the gas. Math: p = K_H × x. **Applications:** soda fountains (CO2 dissolved under pressure), scuba diving (decompression sickness).

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More Chemistry topics

Amines and BiomoleculesChemical KineticsAldehydes, Ketones and Carboxylic AcidsEquilibriumRedox ReactionsHydrocarbonsChemical Bonding and Molecular StructureStructure of Atom