| 1 |
How many % age of nitrogen present in air by volume? |
- A. 70%
- B. 75%
- C. 78%
- D. 80%
|
| 2 |
In the preparation of insoluble salts, which one of the facts is incorrect? |
- A. Two soluble salts are mixed
- B. Two in soluble salts are mixed .
- C. One of the salt produced is insoluble
- D. Both of the salts produced are insoluble
|
| 3 |
Who was prepared acetic acid in laboratory? |
- A. Berzelius
- B. Wohler
- C. Kolbe
- D. Dalton
|
| 4 |
For reactions having large Kc value, the reaction proceeds to: |
- A. Completion
- B. Equilibrium state
- C. back ward
- D. None of these
|
| 5 |
The order of reactivity of hydrogen halides with alkenes is. |
- A. HI>HBr
- B. HBr>HI
- C. HCl>HBr
- D. HBr < HCl
|
| 6 |
Arrhenius put forward acid base concept in. |
- A. 1878
- B. 1786
- C. 1787
- D. 1790
|
| 7 |
The functional group- COOH is found in |
- A. Carboxylic acid
- B. aldehydes
- C. alcohals
- D. easter
|
| 8 |
Glucose is: |
- A. Hexabydroxy aldehyde
- B. Hexahydroxy ketone
- C. Polyhydroxy aldehyde
- D. Pentahydroxy ketone.
|
| 9 |
The percentage of ocean in world water is. |
- A. 50%
- B. 67%
- C. 97%
- D. 25%
|
| 10 |
Number of discovered element till today are. |
- A. 140
- B. 118
- C. 90
- D. 16
|
