Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
Let us consider a copper wire having radius r and length l. Let its resistance be R. If the radius of another copper wire is 2r and the length is l/2 then the resistance of this wire will be
R
2R
R/4
R/8
Basic scientific principle behind a nuclear reactor is ?
Nuclear fusion
Controlled nuclear fusion
Uncontrolled nuclear fission
Controlled nuclear fission
Which one of the following statements is NOT correct for the given reaction?
Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s)
Iron is the reducing agent
The solution turns green in color after the reaction
Copper is a more reactive metal than iron
The reaction is an example of a redox reaction
Which one of the following is an organic acid?
Hydrochloric acid
Nitric acid
Acetic acid
Sulphuric acid
Dinitrogen (N2) and dioxygen (O2) are the main constituents of air but they do not react with each other to form oxides of nitrogen because of ?
the reaction requires initiation by a catalyst
oxides of nitrogen are unstable
the reaction is endothermic and requires very high temperature
the stoichiometry of N2 and O2 in air is not ideal for the reaction to take place
