Quiz -1 EVS questions

The most abundant Nobel gas in the earth atmosphere?

Argon

Number of layers in the earth atmosphere?

Troposphere

Stratosphere

Mesosphere

Ionosphere

Ozone Layer is present in which layer of the atmosphere?

Stratosphere

What is the full form of ICAR?

Indian Council of agricultural research

What is the full form of CPCB?

Central pollution control board

What is the full form of IUCN?

International Union for conservation of nature

Comments

Renewable sources of energy

Renewable sources of energy are the sustainable energy sources because the se are not depleted with usage as they can be replenished either naturally or manually within the short time scale and hence can be used again and again. Advantages/Benefits of Renewable sources of energy ü Ensure energy Security ü R educ tion in greenhouse gas emissions, ü Help to combat the change s in climat ic conditions T ypes of Renewable sources of energy 1. Solar Energy Solar energy is one of the most abundant and widely used renewable source s of energy which can be used as follows: i. Either directly as heat for solar heater for boiling water/preparing food etc. ii. Or converted to electricity using Photovoltaic (PV) Solar Panels which is then used as energy source for diverse purposes. Photovoltaic (PV) Solar Panels : These are the panels prepared using semiconductor materials (e.g., silicon) ...

Bathochromic and Hypsochromic Shift

B athochromic shift - It is the shift of the absorption maxima (λ max ) of a substance towards longer wavelengths . It is also known as red shift . Since, Energy (E) is inversely proportional to Wavelength. So, in Bathochromic shift----energy decreases and wavelength increases. In Bathochromic shift, energy decreases and wavelength increases. Factors causing Bathochromic shift: The bathochromic shift is caused by following: A. Extending Conjugation i. either by increasing double bonds ii. or by adding electron donating groups ( like -OH, -NH 2 ) in conjugation to double bonds. B. Solvent Effects i. The less polar (non-polar) solvents cause bathochromic shift for n-π* transitions. ii. The more polar (polar) solvents cause bathochromic shift for π-π* transitions. Example: Benzene shows π-π* electronic transitions at 255 nm. Adding auxochrome NH 2 to the benzene ring makes it aniline an...

Isotopes (समस्थानिक), Isobars (समभारिक) and Isotones (समन्यूट्रानिक) with examples

Isotopes: Isotopes are the atoms of an element having same atomic number but different mass number. They also have the same number of protons . Example 1 : · Hydrogen has three isotopes : o Protium ( 1 H 1 ) : Atomic Number = Number of protons = 1, Mass number = 1 o Deuterium ( 1 H 2 ) : Atomic Number = Number of protons = 1, Mass number = 2 o Tritium ( ( 1 H 3 ) : Atomic Number = Number of protons = 1, Mass number = 3 Ex ample 2 : · Carbon has two isotopes : o Carbon-12 ( 6 C 12 ) : Atomic Number = Number of protons = 6, Mass number = 12 o Carbon-14 ( 6 C 14 ) : Atomic Number = Number of protons = 6, Mass number = 14 समस्थानिक : समस्थानिक एक तत्व के परमाणु होते हैं जिनकी परमाणु संख्या समान होती है लेकिन द्रव्यमान संख्या भिन्न होती है। उनके ...

Chemistry Notes for B.Sc. and M.Sc.

Search This Blog