- convex lens
- concave lens
- condenser lens
- none of these
- 25 miles per sec
- 60 miles per sec
- 7 miles per sec
- 10 miles per sec
- 10-3 meter
- 10-6 meter
- 10-9 meter
- 10-12 meter
- 9.5×106 km
- 9.5×109 km
- 9.5×1012 km
- 9.5×1018 km
- Nothing is impossible
- Quinoline is an inhibitor
- Quinoline is a catalyst
- Quinoline is an activator
- Aufbau principle
- Pauli exclusion principle
- Hund’s rule
- Periodic law
- 1616. Holes occurring in heavenly bodies
- Bright spots on the sun
- Collapsing object of high density
- Collapsing object of low density
- Diatonic scale
- Fahrenheit Scale
- Richter scale
- Celsius Scale
- Jabar bin Hayyan
- Zakariya Al – Razi
- Abu Ali Sina
- Abdul Qasim Majreeti
- copper,nickel
- copper, tin
- copper, silver
- copper, zinc
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