What is the name of the central part of the earth?
What is the name of the central part of the earth?
A. Mantle
B. Core
C. Crust
D. None of the above
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Turpentine is obtained from___________?
Turpentine is obtained from___________?A. Oak tree
B. e tree
C. Birch tree
D. Lemon treeTurpentine (also called spirit of turpentine, oil of turpentine, wood turpentine and colloquially turps) is a fluid obtained by the distillation of resin from live trees, mainly es. It is mainly used as a solvent and as a source of materials for organic synthesis.
Wood is the main raw material for the manufacture of ____________?
Wood is the main raw material for the manufacture of ____________?
A. Paint
B. Gun powder
C. Paper
D. InkCovalent network crystals have_____________?
Covalent network crystals have_____________?
A. higher melting point then molecular crystals
B. lower melting point then molecular crystals
C. discrete molecules linked by Van der waals forces
D. hydrogen bondingWhich of the following noble gases is abundant in air?
Which of the following noble gases is abundant in air?A. Neon
B. Helium
C. Argon
D. MethaneAll of the following are electromagnetic radiations except__________?
All of the following are electromagnetic radiations except__________?
A. Red light
B. Sound waves
C. X-Rays
D. PhotonOne of the following countries produces maximum energy from atomic reactors?
One of the following countries produces maximum energy from atomic reactors?A. France
B. USA
C. UK
D. none
Other countries have significant amounts of nuclear power generation capacity. By far the largest nuclear electricity producers are the United States with 808,028 GWh of nuclear electricity in 2019, followed by France with 395,908 GWh.