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

Learn physical and chemical changes multiple choice questions, grade 7 science online test 19 for elementary school degree online courses, distance learning for exam prep. Practice making ammonia multiple choice questions (MCQs), physical and chemical changes quiz questions and answers for science class for grade 7 science tutor questions with answers.

Study elementary school science multiple choice questions (MCQs): nitrogen is obtained from, for free online courses with choices 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 for online learning making ammonia quiz questions 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

B

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

B

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

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

A

MCQ: 'volume' of gases is

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

A

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

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

B