Wind is a very reliable energy resource
Geothermal energy causes a lot of air pollution.
Geothermal energy is available everywhere.
Explanation:
Renewable energy source is an energy source that can easily be replenished as it is being used up.
The continuous usage does not affect its availability.
There are various sources of renewable energy like wind, water, solar, biomass, geothermal.
- Geothermal energy is not available everywhere. It is limited to places where heat from within the earth can be harnessed on the surface.
- This energy source is a clean source of energy. It does not cause environmental pollution of any sort.
- Wind energy is not very reliable. On windy days, the output is very large. On days that are not windy, little amount of energy will be produced.
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Answer:chromosome is made of DNA. DNA is double helix structure made of sugar, phosphorus and nitrogen bases.
Explanation:
Answer:
B) an anion
Explanation:
During bonding atoms may share electron or give out electron . In the case of electrovalent or ionic bonding, electron(s) is/are transferred from one atom to another . The atom that donate the electron are known as donor atom and the atom that receives the electron are known as receivers.
The atom that donate the electron becomes a cation(positively charged) as it lose it electron(s) while the receiver gains electron to become an anion which is a negatively charge ion.
An example of such interaction is between a sodium atom and a chlorine atom. The Na atom lose it electron to become positively charged(cation) while the chlorine atom gains electron to become negatively charged(anion). Both atom bond together losing and gaining electron to fulfill the octet rule.
Na+ + Cl- → NaCl
Na2C2O4(aq) + CaCl2(aq) -----> 2NaCl(aq) + CaC2O4(s)
Here, CaC2O4(s) is a precipitate in the reaction as a result of precipitation reaction or double displacement reaction.
As we know that double displacement reaction two metal ions displaces each other from their salt solutions.
As we know that precipitation reaction is a reaction in which precipitate is formed.
Bases produce hydroxide ions, while acids produce hydrogen ions.
Bases have a pH of above 7, and are bitter and slippery.
Answer: <span>c. hydroxide ions</span>
