MnO2 + 4HCl -> MnCl2 + H2O + Cl2 The oxidising agent is? Mark as favorite Copy Link Ag + Zn(NO3)3 MnCl2 MnO2 HCl Check Answer
A student added dilute HCl to a test tube containing zinc granules and made following observations? Mark as favorite Copy Link a gas evolved which burnt with a pop sound the solution becomes green in colour the zinc surface became dull and black the solution remained colourless Check Answer
A compound used for whitewashing is? Mark as favorite Copy Link Limestone Blue vitriol Slaked Lime Quick lime Check Answer
Lead nitrate Pb(NO3)2 on heating forms Lead oxide (PbO) solid and Nitrogen dioxide gas. What are the color of lead oxide and nitrogen dioxide? Mark as favorite Copy Link Yellow, Brown Yellow, Colourless White, Brown White, Colourless Check Answer
What is observed when a solution of potassium iodide is added to silver nitrate solution? Mark as favorite Copy Link Agl is soluble in water yellow precipitate of Agl is formed White precipitate of silver iodide is formed No reaction takes place Check Answer
To facilitate the electrolysis of water we add a few drops of acids like sulfuric acid or salts like NaCl because? Mark as favorite Copy Link It prevents the decomposition of electrodes used None It acts as a catalyst It increases the electrical conductivity of water Check Answer
Which of the following gases can be used for storage? Mark as favorite Copy Link Carbon dioxide or Helium Helium or Nitrogen Nitrogen or Oxygen Carbon dioxide or Oxygen Check Answer
Ethane (C2H6 ) on complete combustion gave CO2 and water. It shows that the results are in accordance with the law of conservation of mass. Then, the coefficient of oxygen is equal to? Mark as favorite Copy Link 7/2 5/2 3 2 Check Answer
Zinc reacts with silver nitrate to form which compounds? Mark as favorite Copy Link Ag + Zn(NO3)3 AgNO3 + Zn(NO3)2 Zn(NO3)2 + Ag ZnNO3 + Ag Check Answer
In an electrolytic cell where electrolysis is carried, anode has? Mark as favorite Copy Link Connected to negative terminal of the battery Negative charge Positive change None of these is correct Check Answer