- Photochemical smog is formed through photochemical reaction involving solar energy
- Photochemical smog does not cause irritation in eyes and throat.
- Carbon monoxide does not play any role in photochemical smog formation
- Photochemical smog is an oxidising agent in character
Category: Past Papers MCQs
| No. | Topics. | No. | Topics. |
|---|---|---|---|
| 1. | Biology mcqs | 2. | Chemistry mcqs |
| 3. | General Knowledge mcqs | 4. | Pak Studies |
| 5. | Physics mcqs |
- one gram atom of carbon contains Avogadro s number of molecuha,
- one mole of oxygen gas coneains Avogadro 's number of molecules
- one mole of hydrogen contains Avogadro's mumber of atoms
- d ane mole of electrons stands for 6.0.2 x 10-23
- Slaked lime
- Plaster of paris
- CaCO3
- Hydrolith
- pH of drinking water should be between 5.5–9.5
- Concentration of DO below 6 ppm is good for the growth of fish
- Clean water would have BOD value of less then 5 ppm
- Oxides of sulphur, nitrogen and carbon are the most widepread air pollutant
- Some of the SiO4– units are replaced by AlO5–and AlO9– ions in zeolites
- They are used as cation exchangers
- They have open structure which enables them to take up small molecules
- Zeolites are aluminosilicates having three dimensional network
- Enzymes are denaturated by ultraviolet rays and at high temperature
- Enzymes are least reactive at optimum temperature
- Enzymes are mostly proteinous in nature
- Enzyme action is specific
- Quartz
- Rock salt
- Dry ice
- Diamond
- CHCl2
- C6H5,Cl
- C6H6
- NaCl
- Ozone
- Acrolein
- Peroxyacetyl nitrate
- Chlorofluorocarbons
- Physical adsorption is reversible in nature
- Physical adsorption involves vander waals forces
- Rate of physical adsorption increases with increase of pressure on the adsorbate
- High activation energy is involved for physical adsorption
- RCOOR
- RCONH2
- R-COCl
- R-NH2
- MgO
- CaO
- Al2O3
- Na2O
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