1 |
The salts of which element are present in detergent that causes the rapid growth of algae in water bodies is. |
- A. Phosphate
- B. Calcium
- C. Sodium
- D. All of them
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2 |
Which one of the diseases causes severe diarrhea and can be fatal? |
- A. Jaundice
- B. Dysentery
- C. Cholera
- D. Typhoid
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3 |
The density of water is ................. at 4<sup> o</sup>C |
- A. 1 gcm<sup>-1</sup>
- B. 2 gcm<sup>-1</sup>
- C. 3 gcm<sup>-1</sup>
- D. 4 gcm<sup>-1</sup>
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4 |
Which one of the following properties of water is responsible for rising of water in plants? |
- A. Specific heat capacity
- B. Viscosity
- C. Excellent solvent action
- D. Capillary action
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5 |
Which one of the following salts makes the water permanently hard? |
- A. NaCO<sub>3</sub>
- B. NaHCO<sub>3</sub>
- C. CA(HCO<sub>3</sub>)<sub>2</sub>
- D. CaSO<sub>4</sub>
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6 |
Which gas is used to destroy harmful bacteria in water? |
- A. Iodine
- B. Chlorine
- C. Flourine
- D. Bromine
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7 |
Water dissolves Non-ionic compounds by: |
- A. Ion-Ion forces
- B. Dipole forces
- C. Dipole - Dipole forces
- D. Hydrogen Bonding
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8 |
Temporary hardness is because of. |
- A. Ca(HCO<sub>3</sub>)<sub>2</sub>
- B. CaCO<sub>3</sub>
- C. MgCO<sub>3</sub>
- D. MgSO<sub>4</sub>
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9 |
Mg<sup>2+</sup> and Ca<sup>2+</sup> ions react with soap to form calcium and magnesium salts of fatty acids called. |
- A. Gelatin
- B. Scum
- C. Paste
- D. None of them
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10 |
Sodium zeolite is resin of: |
- A. NaAl(SiO<sub>3</sub>)<sub>2</sub>
- B. KAl(SiO<sub>3</sub>)<sub>2</sub>
- C. LiAl(SiO<sub>3</sub>)<sub>2</sub>
- D. RbAl(SiO<sub>3</sub>)<sub>2</sub>
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