General Knowledge : General Science QUESTIONS AND ANSWERS :: part18 : 16 to 20
Following General Knowledge Multiple choice objective type questions and answers will help you in TRB, SSC and UPSC 2014 examinations :
16.Given below are two statements, labeled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ? 1. Assertion (A) : For the production of aluminium, cheap electricity is essential. 2. Reason (R) : Extraction of aluminium from its ore requires abundant supply of electricity. |
| Both A and R are true and R is the correct explanation of A. |
| Both A and R are true but R is not the correct explanation of A. |
| A is true but R is false. |
| A is false but R is true. |
17.The anti-knocking compound used in pettol-engines is : |
| diethyl Lead |
| tetra-ethyl Lead |
| triethyl Lead |
| mono ethyl Lead |
18.Clear nights are colder than cloudy nights because of |
| conduction |
| condensation |
| radiation |
| insolation |
19.The essential element in all organic compounds is |
| nitrogen |
| sulphur |
| carbon |
| chlorine |
20.Which one of the following fertilizers has more nitrogen content ? |
| Urea |
| Ammonium Nitrate |
| Potassium Nitrate |
| Ammonium Phosphate |
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