General Knowledge : General Science QUESTIONS AND ANSWERS :: part3 : 51 to 55
Following General Knowledge Multiple choice objective type questions and answers will help you in TRB, SSC and UPSC 2014 examinations :
51.Which of the following are synthetic rubbers ? 1. Thiokol 2. Isoprene 3. Neoprene |
| 1 and 2 |
| 2 and 3 |
| 1 and 3 |
| 1, 2 and 3 |
52.Which of the following is a physical change ? |
| Oxidation |
| Reduction |
| Sublimation |
| Decomposition |
53.How does common salt help inseparating soap from the solution after saponification ? |
| By decreasing solubility of soap |
| By increasing solubility of soap |
| By decreasing density of soap |
| By increasing density of soap |
54.The ore of Which of the following metals can be concentrated by hydraulic washing ? |
| Tin |
| Sodium |
| Iron |
| Manganese |
55.Catalytic properties of a substance may be best defined as a phenomenon of |
| Absorption |
| Chemisorption |
| Adsorption |
| None of these |
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