Chemistry Unit 5 Test

On electrolysis of dil. H₂SO₄ using platinum electrodes, the product obtained at the anode will be

• Hydrogen

• Oxygen

• Sulphur Dioxide

• Hydrogen Sulphide

Warming ammonium chloride with sodium hydroxide in a test tube is an example of

• Closed System

• Open System

• Isolated System

• None of these

Tags

NGSS.HS-PS3-4

If 32g of methane is burned in excess of oxygen then standard enthalpy of combustion is

• Increased two times

• Reduced to half

• Increase four times

• Reduced to four times

Tags

NGSS.HS-PS1-4

Standard reduction electrode potentials of three metals P, Q and R are +0.5 V, -3.0 V and -1.2 V respectively. The order of reducing power of these metals is

• Q > R > P

• R > Q > P

• P > Q > R

• P > R > Q

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

When HNO₃ acts as an oxidizing agent and ultimately forms NO₂, NO, HNO₂ then the number of electrons transferred in each case is

• 1, 3, 2

• 4, 3, 1

• 1, 5, 3

• 3, 5, 7

Tags

NGSS.HS-PS1-2

In the reaction 

4Al + 3O₂ → 4Al³⁺ + 6O^2- 

 Which of the following statements is incorrect

• Metallic Aluminium is reducing agent

• Al³⁺ is an oxidizing agent

• Metallic Aluminium is reduced to Al³⁺

• Redox reaction

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

In acidic medium, moles of H2O and H⁺ are added respectively for given reaction are           

10Cl^-    + 2MnO₄-  →  2Mn²⁺ + 5Cl₂

• 4, 4

• 8, 16

• 8, 8

• 4, 8

Which of the following will be collected at cathode during electrolysis of aq. CuSO₄ solution

• H₂

• O₂

• SO₃

• Cu

During balancing of Redox equations by oxidation number method the ‘O’ and H- atoms are balanced by

• Method of difference

• Inspection method

• Ion-electron method

• Spectroscopic method

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-7