| 1 |
SI unit of time is. |
- A. S
- B. min
- C. hr
- D. all above
|
| 2 |
Chemical bond between N2 Molecule is |
- A. Ionic
- B. Single covalent
- C. Double covalent
- D. Triple vocalent
|
| 3 |
Freezing of a liquid is a |
- A. Chemical change
- B. Chemicla property
- C. Physical change
- D. None of these
|
| 4 |
Water and dissolved salts ae conducted from roots to leaves by. |
- A. Root haris
- B. Xylem
- C. Phloem
- D. Stomata
|
| 5 |
The ... prevents food from entering the trachea. |
- A. Glottis
- B. Epiglottis
- C. Bronchi
- D. Alveoli
|
| 6 |
Chemical bond is O2 is. |
- A. Ionic
- B. Covalent
- C. Metalic
- D. None of these
|
| 7 |
Which of the following plays an important role in blood clotting. |
- A. Red blood cells
- B. White blood cell
- C. Platelets
- D. Bone cells
|
| 8 |
Which blood vessesl have valves in it. |
- A. Capillaries
- B. Artery
- C. Vein
- D. Arteriole
|
| 9 |
The opening of air passage in the laryanx is called. |
- A. Trachea
- B. Bronchi
- C. Glottis
- D. Alveoli
|
| 10 |
Speed of sound in water is |
- A. 1000 ms-1
- B. 1500 ms-1
- C. 900 ms-1
- D. 2000 ms-1
|