Search SchoolNGR

Chemistry Past Questions and Answers

Classroom

Chemistry Questions

Question 571:

The diagram above shows the reaction path of an exothermic reaction. The heat of reaction is represented by

SchoolNGR Classroom

A L
B Ll
C Lll
D LV

View Answer & Explanation

Question 572:

The IUPAC name for

SchoolNGR Classroom

A 2-methylbutanoic acid
B 2-methyl-1- hydroxyketone
C 2-methyl-1-hydroxy aldehyde
D 2-methylpentanoic acid

View Answer & Explanation

Question 573:

Carbon (ll) oxide may be collected as shown above because it

SchoolNGR Classroom

A Is heavier than air
B Is less dense than air
C Is insoluble in water
D Burns in oxygen to form carbon (IV) oxide

View Answer & Explanation

Question 574:

Which of the following would support the conclusion that a solid sample is a mixture?

SchoolNGR Classroom

A The solid can be ground to a fine powder
B The density of the solid is 2.25 g dm<sup style='font-size: smaller;'>3</sup>
C The solid has a melting range of 300<sup style='font-size: smaller;'>o</sup>C to 375<sup style='font-size: smaller;'>o</sup>C
D The solid absorbs moisture from the atmosphere

View Answer & Explanation

Question 575:

Which of the following would support the conclusion that a solid sample is a mixture?

SchoolNGR Classroom

A The solid can be ground to a fine powder
B The density of the solid is 2.25 g dm<sup style='font-size: smaller;'>3</sup>
C The solid has a melting range of 300<sup style='font-size: smaller;'>o</sup>C to 375<sup style='font-size: smaller;'>o</sup>C
D The solid absorbs moisture from the atmosphere

View Answer & Explanation

Stay Updated

Follow us on:

Subjects