- Introduction
- Rest time! Have fun
- Physics
- Chemistry
- BIOLOGY
- Reaching the age of Adolescence
- CROP PRODUCTION AND MANAGMENT
- Cells : The basic structural unit of life
- Nutrition in human beigns
- RESPIRATION IN HUMAN BEIGNS
- TRANSPORTATION IN HUMAN BEIGNS
- excretory system in human beigns
- NERVOUS SYSTEM
- PHOTOSYNTHESIS
- Respiration in plants
- REPRODUCTION IN PLANTS
- MOVEMENTS IN PLANTS
- Forest our lifeline
- WASTE WATER STORY
- WEATHER,CLIMATE AND ITS ADAPTATION .
- Reaching the age of Adolescence
- Model tests
- Animation time
Acids,Bases And Salts
1. The pH of water is
A. 5
B .6
C .7
D. 8
2. USUALLY ACIDS HAVE pH FROM
A. 0-7
B. 7
C. 8-14
D. 14 ABOVE
3. TAMARIND CONTAINS WHICH ACID
A. TANNIC ACID
B. TARTARIC ACID
C. ACETIC ACID
D. NOT ACID IT IS BASE
4. SODIUM HYDROXIDE IS
A. ALKALI
B. BASE
C. CAUSTIC SODA
D. ALL THE ABOVE
5. WHICH IS STRONGEST ACID
A. HNO3
B. H2SO4
C. HCl
D. CH3COOH
6.THIS ACID IS USED TO MAKE BATTERY CELLS
A. HNO3
B. H2SO4
C. HCl
D. CH3COOH
7. THIS ACID IS PRODUCED IN OUR BODIES TO FIGHT AGAINST PATHOGENS
A. HNO3
B. H2SO4
C. HCl
D. CH3COOH
8. THE FORMULA OF SULPHURIC ACID
A. HNO3
B. H2SO4
C. HClD.
D. CH3COOH
9. THE FORMULA OF NITRIC ACID
A. HNO3
B. H2SO4
C. HClD.
D. CH3COOH
10.
THE CHEMICAL FORMULA OF SODIUM HYDROXIDE A. SOH
B. KOH
C.NaOH
D. Mg(OH)2
A. CONCENTRATED
B. DILUTE
C. BOTH
D. NONE
12.HCl + NaOH = NaCl + H20
THE SALT IN THE REACTION IS
A. SODIUM ACETATE
B. POTTASIUM ACETATE
C. SODIUM CHLORIDE
D. POTTASIUM CHLORIDE
13. THIS ACID IS USED TO MAKE VINEGAR NAME IT
A. CITRIC ACID
B. NITRIC ACID
C. ACETIC ACID
D. TARTARIC ACID
14. THIS ACID IS IN YOUR STOMACH NAME IT
A. SULPHURIC ACID
B. NITRIC ACID
C. ACETIC ACID
D. HYDROCHLORIC ACID
15. NaCl + H2O = ---------------------------------
A. NaOH + HCl
B. HCl + NaOH
C. No reaction
D. Both A and B
16. THIS ACID IS PRESENT IN MILK NAME IT
A. MILKIC ACID
B. CITRIC ACID
C. LACTIC ACID
D. BOTH A AND C
17. THE pH OF HCl HAVING CONCENTRATION 10-2 M/l
A. 2
B.0.2
C. 0.02
D 0.0002
18. THE pOH OF NaOH HAVING CONCENTRATION 10-4 M/l
A. 4
B. 0.4
C. 0.04
D. 0.004
19. NAME THE BASE WHICH IS USED IN SOAPS
A. NaOH
B. KOH
C. NH4OH
D. BOTH A AND B
20. THE FORMULA OF ACETIC ACID IS
A. HCl
B. CH3COOH
C. H2SO4
D. HNO3