201. | what is horn silver |
A. silver chloride | |
B. silver bromide | |
C. silver nitrate | |
D. silver iodide |
202. | Why is silver nitrate usually kept in colored bottles only? |
A. it oxidises in air | |
B. It evaporates in white bottles | |
C. it explodes in the sunlight | |
D. it decomposes in sunlight |
203. | The chemical name of lunar caustic is |
A. sodium sulfate | |
B. silver nitrate | |
C. calcium carbonate | |
D. mercuric chloride |
204. | Which of the following is coated on a photographic plate? |
A. silver oxide | |
B. silver bromite | |
C. silver chloride | |
D. silver iodide |
205. | Which element is used to make artificial rain |
A. sodium iodide | |
B. silver bromide | |
C. ethyl bromide | |
D. silver iodide |
206. | Which of the following metals is found in free state |
A. aluminium | |
B. Sleep | |
C. Iron | |
D. lead |
207. | Which is the most malleable and malleable metal? |
A. Sleep | |
B. lead | |
C. aluminium | |
D. Silver |
208. | What is the ‘king of metals’? |
A. Sleep | |
B. Silver | |
C. Iron | |
D. aluminium |
209. | gold is mainly extracted from which ore |
A. Selwynite | |
B. calaverite | |
C. these two | |
D. none of these |
210. | In which of the following acid does gold dissolve |
A. concentrated sulfuric acid | |
B. concentrated nitric acid | |
C. glacial acetic acid | |
D. Amalraj |