- Quartz glass —>100% silica
- Pyrex glass—-> 60-80% silica, 10 to 25% B2O and Al2O3,
- Soda lime glass 80% silica, 20% CaO
- Soda lime glass—–> 75 silica, 15% Na2,O, 10% CaO
Category: Past Papers MCQs
| No. | Topics. | No. | Topics. |
|---|---|---|---|
| 1. | Biology mcqs | 2. | Chemistry mcqs |
| 3. | General Knowledge mcqs | 4. | Pak Studies |
| 5. | Physics mcqs |
- The concept of hybridization is not applied to isolated atoms.
- Hybridization is the mixing of at least two non-equivalent atomic orbitals.
- The number of hybrid orbitals generated is more than the number of pure atomic orbitals that participate in the hybridization process.
- Hybridization requires an input of energy.
- density in kg m
- forge in Newtons
- pressure in pascals
- amount of the substance in mol L
- Reversible
- Increases with increase in temperature
- Low heat of adsorption
- Increases with increase in surface area
- On reaction with nitrous acid alkylamines produce alcohol
- On reaction with nitrous acid arylamines produce phenol
- Alkylamines are more basic than ammonia
- Alkylamines are more basic than arylamines
- Alkyl nitrite
- Secondary amine
- Nitroalkane
- Alcohol
- waste material left after concentration
- waste material left after purification of metal
- waste material after electrolysis
- waste material present in ore to be removed during concentration
- Sodium chlorate
- Organo carbonates
- Potassium dihydrogen phosphate
- Ammonium nitrate
- tin stone is magnetic in nature
- wolframite is non magnetic m nature
- wolframite is Fe WO4
- cassiterite and rutile are sulphides of the metals
- Paints, milk
- Ink, paints
- Fog, mist
- Smoke, colloidion
- gangue + FluX= slag
- froth + slag =gangue
- gangue + slag= flux
- flux + slag=gangue
- mechanical
- Mass
- Volume
- All are correct
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