| 241. | Match List-I with List-II and select the correct answer from the codes given below the Lists : List-I A. Potassium Bromide B. Potassium Nitrate C. Potassium Sulphate D. Monopotassium Tartrate List-II 1. Fertilizer 2. Photography 3. Bakery 4. Gunpowder |
A. A → 2, B → 4, C → 1, D → 3 | |
B. A → 2, B → 4, C → 3, D → 1 | |
C. A → 4, B → 2, C → 3, D → 1 | |
D. A → 4, B → 2, C → 1, D → 3 |
| 242. | Match List-I with List-II and select the correct answer from the code given below the Lists : List-I (Molecules) A. Vitamin B₁₂ B. Hemoglobin C. Chlorophyll D. Brass List-II (Elements present) 1. Magnesium 2. Cobalt 3. Copper 4. Iron |
A. A → 2, B → 4, C → 1, D → 3 | |
B. A → 2, B → 1, C → 3, D → 4 | |
C. A → 4, B → 1, C → 2, D → 3 | |
D. A → 3, B → 4, C → 1, D → 2 |
| 243. | The colors of fireworks are obtained by the salts of which of the following elements? |
A. Zn and S | |
B. K and Hg | |
C. Mr and Ba | |
D. Cr and Ni |
| 244. | A radioactive element of which India has large reserves. |
A. plutonium | |
B. radiation | |
C. thorium | |
D. uranium |
| 245. | The chemical composition of pearl is |
A. calcium carbonate | |
B. calcium carbonate and magnesium carbonate | |
C. calcium chloride | |
D. calcium sulphate |
| 246. | Which of the following is the main constituent of cement |
A. gypsum | |
B. limestone | |
C. ashes | |
D. matiar |
| 247. | Bauxite is the ore for obtaining which of the following metals? |
A. Iron | |
B. copper | |
C. Silver | |
D. aluminum |
| 248. | The fuel used in the Fast Breeder Test Reactor at Kalpakkam is |
A. enriched uranium | |
B. thorium | |
C. plutonium | |
D. tungsten |
| 249. | How alum cleans dirty water |
A. absorption | |
B. desorption | |
C. coagulation | |
D. dialysis |
| 250. | Dark purple compound substance which is used as antiseptic and disinfectant – |
A. potassium nitrate | |
B. sodium thiosulfate | |
C. potassium permanganate | |
D. calcium phosphate |