61). Consider the following Statements regarding antibiotics :
1. They are used to destroy diseasecausing bacteria.
2. They can be applied to the skin, swallowed or injected to fight microorganisms 1ns1de the body.
3. They are effective against diseasecausing Viruses.
4. The first antibiotic to be discovered was tetracycline.
Which of the statements given above is/are correct?
| A). 1 and 2 only |
| B). 1, 2 and 4 |
| C). 2, 3 and 4 |
| D). 1 only |
|
62). In terms of magnetic properties, oxygen belongs to
| A). magnetic materials |
| B). ferromagnetic materials |
| C). paramagnetic materials |
| D). diamagnetic materials |
|
63). Light-emitting diode (LED) converts
| A). light energy into electrical energy |
| B). electrical energy into light energy |
| C). thermal energy into light energy |
| D). mechanical energy into electrical energy |
|
64). The Celsius temperature is a/an
| A). relative temperature |
| B). absolute temperature |
| C). specific temperature |
| D). approximate temperature |
|
65). The gas used in a refrigerator is
| A). cooled down on flowing |
| B). heated up on flowing |
| C). cooled down when compressed |
| D). cooled down when expanded |
|
66). If two conducting spheres are separately charged and then brought in contact
| A). the total energy of the two spheres is conserved |
| B). the total charge on the two spheres is conserved |
| C). both the total energy and the total charge are conserved |
| D). the final potential is always the mean of the original potential of the two spheres |
|
67). Which type/types of pen uses/use capillary action in addition to gravity for flow of ink?
| A). Fountain peri |
| B). Ballpoint pen only |
| C). Gel pen only |
| D). Both ballpoint pen and gel pen |
|
68). Nearly 30% of the solar radiations return back to the space without contributing anything to the earth's surface temperature. This amount of radiation is known as
| A). black body |
| B). tropopause |
| C). earth's albedo |
| D). mesopause |
|
69). The crew and passengers of a flying aircraft suffer generally from chronic obstructive pulmonary disease due to the effect, of
| A). solar radiation |
| B). ozone concentration |
| C). nitrogen oxide |
| D). participate pollutant |
|
70). Match List-I with List-II and select the correct answer using the code given below the Lists :| List -I (Agent) | List-II (Disease) | | A.Arsenic | 1.Fluorosis | | B. Fluoride | 2.Melanosis | | C. Dust | 3.Presbycusis | | D. Noise | 4.Silicosis |
Below options are given in A B C D order
| A). 3 1 4 2 |
| B). 3 4 1 2 |
| C). 2 1 4 3 |
| D). 2 4 1 3 |
|
