- 50
- 60
- 45
- 35
- a
-
20 Liters = 240 km
1 Liter=240/20
12 Km
600/12=50
Rusting of Iron involves …….
- Decomposition
- Reduction
- Oxidation
- Displacement
- c
-
Rusting is caused by oxidation in the presence of air, moisture or water.
Atomic Number of Oxygen is …..
- 7
- 8
- 9
- 10
- b
-
Oxygen is represented by “O”.
Oxygen was discovered by Joseph Priestly in 1774.
Microphone converts sound energy into …….
- Heat Energy
- Electrical Signals
- Microwaves
- Optical Signals
- b
Atomic Number of Nitrogen is …….
- 7
- 8
- 9
- 10
- a
-
The symbol of Nitrogen is “N”.
Nitrogen was discovered by Daniel Rutherford.
Glass is made of the mixture of ….?
- Sand & Salt
- Quartz & Mica
- Sand & Silicate
- None of these
- c
Who invented Jet Engine?
- Lewis
- Waterman
- Sir Frank Whittle
- Gottle Dalmer
- c
-
Originally, Jet Engine was invention of Sir Frank Whittle, Hans Von Ohain and Albert Fono.
First Jet Engine was invented in 1930.
Which one of the following companies will launch Project Sky-bender to boost 5G internet speech?
- IBM
- Apple
- a
-
Project Skybender is a solar powered drones project.
The Empire State Building is located in:
- New York
- Birmingham
- Paris
- None of these
- a
-
The Empire State Building is a steel framed building.
It consist of 102 stories.
It was completed in 1931 in New York.
Which is the thinnest layer of earth?
- Mantle
- Core
- Crust
- None of these
- c
-
The crust layer of the land is 3-35km thick beneath the land and 1-8 km thick beneath the ocean.