Physical and Chemical Changes Multiple Choice Questions and Answers 19 PDF Download

Learn physical and chemical changes MCQs, grade 7 science test 19 for online learning courses and test prep. Making ammonia multiple choice questions (MCQs), physical and chemical changes quiz questions and answers include science worksheets for grade 7 science tutor questions with answers.

Science multiple choice questions (MCQ): nitrogen is obtained from with options liquefied air, gaseous air, solidified air and air spaces in soil, making ammonia quiz for online certificate courses preparation with eLearning virtual academy portal for online certifications. Free science study guide to learn making ammonia quiz to attempt multiple choice questions based test.

MCQs on Physical and Chemical Changes Worksheets 19 Quiz PDF Download

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