When an active metal like Al comes in contact with less active element like Cu then it produces__________________?

Related Mcqs:

1. Which of the following produces black spots when it comes in contact with organic substances such as skin and cellulose?

   A. CuSO4
   B. AgNO3
   C. K2MnO4
   D. CH3COOH

   Submitted by: Muhammad Kamal

2. The basic hydrolysis of ethyl acetate produces__________________?

   A. ethanol
   B. acetic acid
   C. ethanol and acetic acid
   D. ethanol and sodium acetate

3. The radio-active element used in heart pacemakers is ___________?

   A. Uranium
   B. Deuterium
   C. Plutonium
   D. Radium

   Submitted by: Name

4. The element of group VIA which is a non-metal is________________?

   A. S
   B. Se
   C. Te
   D. Po

5. Many properties of an element and its compounds can be predicted from the position of the element in the periodic table. What property could not be predicted in this way ?

   A. The nature of its oxides
   B. The charge on its ions
   C. The formula of its oxide
   D. Its number of isotopes

6. Which catalyst is used in contact process ?

   A. Fe2O3
   B. V2O5
   C. SO3
   D. Ag2O

7. The oxidation number of central metal atom in [Ni(CO)4] is_________________?

   A. 0
   B. 2
   C. 4
   D. 6

8. The specie which donates electrons to central metal atom in coordination sphere is called____________________?

   A. anion
   B. cation
   C. Ligand is positively charged
   D. acid

9. Which of the following is typical transition metal ?

   A. Sc
   B. Y
   C. Cd
   D. Co

10. When a compound of transition element is dissolved in a solution of salt then it produces____________________?

    A. simples ions
    B. complex ions
    C. double salts
    D. strong anions