
General Knowledge : General Science QUESTIONS AND ANSWERS :: part23 : 16 to 20
Following General Knowledge Multiple choice objective type questions and answers will help you in TRB, SSC and UPSC 2014 examinations :
16.Which of the following quantum numbers is/are required to describe the state of an electron ? 1. Principal 2.Azimuthal3. Magnetic 4. Spin |
| 1 only |
| 1 and 2 |
| 1, 2 and 3 |
| 1, 2, 3 and 4 |
17.Most soluble in water is : |
| camphor |
| sugar |
| sulphur |
| common salt |
18.When an electric bulb breaks, there is a mild bang due to : |
| the chemical reaction between the enclosed gases |
| the compressed gases rushing out suddenly |
| the air rushing in to fill the evacuated space |
| none of the above |
19.The fractionation of petroleum gives many products. What is the correct order in which the various fractions mentioned below separate from petroleum ? 1. Gasoline 2. Kerosene3. Diesel oil 4. Lubricating oil |
| 1, 2, 3, 4 |
| 2, 3, 4, 1 |
| 3, 2, 1, 4 |
| 4, 2, 3, 1 |
20.Which form of phosphorus is used in safety matches ? |
| White phosphorus |
| Yellow phosphorus |
| Red phosphorus |
| Black phosphorus |
More General Science QUESTIONS AND ANSWERS available in next pages
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