Physical and Chemical Changes Multiple Choice Questions and Answers 19 pdf eBooks Download

Learn physical and chemical changes MCQs, grade 7 online science test 19, making ammonia multiple choice questions and answers. Making ammonia revision test has science worksheets, helping answer key with choices as liquefied air, gaseous air, solidified air and air spaces in soil of multiple choice questions (MCQ) with making ammonia quiz as nitrogen is obtained from for competitive exam prep, viva interview questions. Free science study guide to practice making ammonia quiz to attempt multiple choice questions based test.

MCQs on Physical and Chemical Changes Quiz pdf Download Worksheets 19

MCQ. Nitrogen is obtained from

  1. gaseous air
  2. liquefied air
  3. solidified air
  4. air spaces in soil


MCQ. Reason of low density of gases is

  1. number of particles per unit area
  2. number of particles per unit volume
  3. mass per unit area
  4. mass per unit volume


MCQ. Reaction that gives out heat, while taking place is known as

  1. exothermic reaction
  2. endothermic reaction
  3. reversible reaction
  4. substitution reaction


MCQ. 'volume' of gases is

  1. indefinite
  2. definite
  3. dependent
  4. reduced


MCQ. Compounds made up of hydrogen and carbon are known as

  1. carbohydrates
  2. hydrocarbons
  3. alkanes
  4. alkenes