| 1 |
The nitrogen present in some fertilizers helps plants |
- A. to fight against diseases
- B. to produce fat
- C. to undergo photosynthesis
- D. to produce protien
|
| 2 |
Ammonia is prepared industrially by |
- A. Contact process
- B. Ostwald process
- C. Birkland Eyed process
- D. Heber process
|
| 3 |
Which woody raw material is used for the manufacture of paper pulp |
- A. Cotton
- B. Biogases
- C. Rice straw
- D. Poplar
|
| 4 |
Which elements are needed for healthy growth of plants |
- A. N,S,P
- B. N,Ca,P
- C. N,P,K
- D. N,K,C
|
| 5 |
Which three elements are needed for the healthy growth of plants |
- A. N,S,P
- B. N,Ca,P
- C. N,P,K
- D. N,K,C
|
| 6 |
Which one of the following is inorganic fertilizer. |
- A. Manure
- B. Urea
- C. Ammonium nitrate
- D. All of these
|
| 7 |
Setting process of cement is based upon |
- A. Hydrolysis
- B. Hydration
- C. Dehydration
- D. Botha a and b
|
| 8 |
The percentage of clay and liem stone in cement is in the ratio of. |
- A. 1 : 1
- B. 1 :2
- C. 1:3
- D. 3:1
|
| 9 |
Which is not a calcarious material |
- A. Clay
- B. Limestone
- C. Marble
- D. Chalk
|
| 10 |
In Pakistan pulp is usually bleached with Cl2. The residual chlorine is removed from pulp by an antichlor which is |
- A. dil HCl
- B. dil NaOH
- C. Water
- D. NaCl
|
