Practice Test


1) _____is well known for definitions of acids and bases


2) The metallic elements are extracted from their ores by


3) Oxidation is a process which involves


4) Reduction is a process which involves


5) An oxidizing agent is a substance which can


6) Reducing agent is a substance which can


7) Which of the following involves the redox reaction?


8) The oxidation number of Mn is +7 in


9) In which of the following reactions, hydrogen acts as an oxidising agent?


10) The violent reaction between sodium and water is an example of


11) Most common oxidation number of an element is -1. The number of electrons in its outermost shell is


12) The conversion of PbS to Pb is


13) The burning of methane in air by oxidation is example of


14) Bleaching is


15) Sulphide minerals are converted to oxides by


16) Hydrogen can have oxidation number/s of


17) In which one of the following compounds the oxidation number of oxygen is positive?


18) Which of the following acts as an oxidizing agent?


19) Which of the following acts both as an oxidising as well as reducing agent?


20) The compound that can work both as an oxidising as well as a reducing agent is


21) In which of the compounds does manganese exhibit highest oxidation number?


22) In which of the following compounds, the oxidation number of iodine is fractional?


23) In which of the following compounds, nitrogen has an oxidation state of -1?


24) Among the following, identify the species with an atom in + 6 oxidation state


25) In which compound chlorine has highest oxidation number?


26) Nitrogen has oxidation number


27) In which of the following compounds, transition metal is in zero oxidation state?


28) Carbon is in the lowest oxidation state in which of the given compound?


29) In which of the following compounds the oxidation number of carbon is zero?


30) Which reaction involves neither oxidation nor reduction?


31) A redox reaction is


32) In which of the following reactions, the underlined substance has been oxidized?


33) Which of the following represents a redox reaction?


34) Which of the following is NOT a redox reaction?


35) Which of the following is NOT a redox reaction?


36) Nitric oxide acts as a reducing agent in the reaction


37) The compound that can work both as an oxidizing as well as a reducing agent is


38) Which of the following involves transfer of five electrons?


39) Which of the following behaves as both oxidizing and reducing agent?


40) which of the following is a redox reaction?


41) Of the following reactions, only one is a redox reaction. Identify it


42) The reaction in which hydrogen peroxide acts as a reducing agent is


43) Which of the following is a redox reaction?


44) In which one of the following reactions, nitrogen is NOT reduced?


45) In which equation, there is no change in valency?


46) Which of the following equation is a balanced equation?


47) To remove stains from clothes ______ is used.


48) Corroded iron is


49) In which of the following oxidation number of chlorine is + 5.


50) In which of the following compounds, iron has the lowest oxidation number?


51) Which of the following acts as a reducing agent?


52) In which of the following reactions, the underlined substance has been reduced?


53) The oxide which cannot act as a reducing agent is