Search SchoolNGR

Chemistry Past Questions and Answers

Classroom

Chemistry Questions

Question 501:

When sodium hydroxide is heated with ammonium tetraoxosulphate (IV), the gas given off may be collected by?

SchoolNGR Classroom

A Bubbling it through concentrated H<sub style='font-size: smaller;'>2</sub>SO<sub style='font-size: smaller;'>2</sub>
B Bubbling it through water and then passing it through calcium oxide
C Passing it directly through calcium oxide
D Passing it directly through calcium chloride

View Answer & Explanation

Question 502:

Which of the following elements will form oxide which will dissolve both in dilute HNO<sub style='font-size: smaller;'>3</sub> and NaOH solutions to form salts?

SchoolNGR Classroom

A Al
B Mg
C Ag
D Mn

View Answer & Explanation

Question 503:

Stainless steel is an alloy of?

SchoolNGR Classroom

A Iron, carbon and silver
B Iron, carbon and lead
C Iron, carbon and chromium
D Iron and carbon only

View Answer & Explanation

Question 504:

Alloys are best prepared by?

SchoolNGR Classroom

A High temperature weilding of the metals
B Electrolysis using the major metallic component as cathode
C Reducing a mixture of the oxies of the elements
D Cooling a molten mixture of the necessary elements

View Answer & Explanation

Question 505:

Corrosion is exhibited by?

SchoolNGR Classroom

A Iron only
B Electropostive metals
C Metals below hydrogen inthe electrochemical series
D All metals

View Answer & Explanation

Stay Updated

Follow us on:

Subjects