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Posted by Niharika Singh 5 years ago (9868896)
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ಹರ್ಷನಂದ ಹರ್ಷನಂದ 4 years, 11 months ago (9197242)
ಹರ್ಷನಂದ ಹರ್ಷನಂದ 5 years ago (9197242)
Yogita Ingle 5 years ago (2577571)
The variations ensure that the survival of the species as they allow the members of population to adapt to the changing environment and conditions. The species are more suitable to the changed environment . Thus continuity of the species is maintained.
For example, Bacteria variants which can withstand tolerate heat will survive better in a heat wave than variant which cannot heat wave. It proves that creation of variations in a species promote survival.
Posted by Sidharth ($Id) 5 years ago (7664183)
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Yogita Ingle 5 years ago (2577571)
Atomic or molecular chemical species having a highly localized HOMO (The Highest Occupied Molecular Orbital) act as Lewis bases. These chemical species have the ability to donate an electron pair to a given Lewis acid in order to form an adduct, as discussed earlier.
Examples of Lewis bases which have an ability to donate an electron pair are listed below.
- Pyridine and the derivatives of pyridine have the ability to act as electron pair donors. Thus, these compounds can be classified as Lewis bases.
- The compounds in which Oxygen, Sulphur, Selenium, and Tellurium (which belong to group 16 of the Periodic Table) exhibit an oxidation state of -2 are generally Lewis bases. Examples of such compounds include water and ketones.
- The simple anions which have an electron pair can also act as Lewis bases by donating these electrons. Examples of such anions include H– and F–. Even some complex anions, such as the sulfate anion (SO42-) can donate pairs of electrons.
Posted by Sidharth ($Id) 5 years ago (7664183)
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Royal Thakur ? 5 years ago (10117822)
Yogita Ingle 5 years ago (2577571)
Lewis Acids are the chemical species which have empty orbitals and are able to accept electron pairs from Lewis bases. This term was classically used to describe chemical species with a trigonal planar structure and an empty p-orbital. An example of such a Lewis acid would be BR3 (where R can be a halide or an organic substituent).
Some common examples of Lewis acids which can accept electron pairs include:
- H+ ions (or protons) can be considered as Lewis acids along with onium ions like H3O+.
- The cations of d block elements which display high oxidation states can act as electron pair acceptors. An example of such a cation is Fe3+.
- Cations of metals such as Mg2+ and Li+ can form coordination compounds with water acting as the ligand. These aquo complexes can accept electron pairs and behave as Lewis acids.
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Siddhee Singh 5 years ago (9188579)
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Meghna Thapar 5 years ago (6237)
Deterrence theory is the idea that an inferior force, by virtue of the destructive power of the force's weapons, could deter a more powerful adversary, provided that this force could be protected against destruction by a surprise attack. Specific deterrence refers to the use of punishment for criminal activity, intended to discourage a specific individual from committing the crime again. ... For example, if the person is wealthy a monetary fine may not deter him from repeating the crime.
Posted by Yashas Laukik 5 years ago (9961129)
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Meghna Thapar 4 years, 11 months ago (6237)
Women with disabilities face significantly more difficulties – in both public and private spheres – in attaining access to adequate housing, health, education, vocational training and employment, and are more likely to be institutionalized. They also experience inequality in hiring, promotion rates and pay for equal work, access to training and retraining, credit and other productive resources, and rarely participate in economic decisionmaking.
Promoting gender equality and empowerment of women is essential to the achievement of the internationally agreed development goals, including the Millennium Development Goals. Women and girls with disabilities experience double discrimination, which places them at higher risk of gender-based violence, sexual abuse, neglect, maltreatment and exploitation.
Posted by राजु नेता राजु नेता 5 years ago (9892265)
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Posted by ❄❄Harshita Bohet❄❄ 5 years ago (10118471)
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Yogita Ingle 5 years ago (2577571)
Our strongest muscle is the masseter, which closes the jaw to chew. When chewing, the force can be upwards of 170 pounds on each molar (“The Power of the Human Jaw,” Scientific American).
Posted by Sri Lekhya Jaladi 5 years ago (10112592)
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Posted by Jitendra Sahu 5 years ago (10122163)
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Yogita Ingle 5 years ago (2577571)
Advantages of road ways over railways are:
- Construction cost of roads is much lower than railway lines.
- Roads can be constructed easily in hilly terrains and undulating topography.
- Roadways act as a feeder to other modes of transport, as they provide a link between railway stations, air and sea ports.
- Road transport is economical in transportation of few persons and relatively smaller amount of goods over short distances.
Yashi Singh 5 years ago (10122202)
Posted by Sonakshi Bhardwaj 5 years ago (9525969)
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Bobby Dubey 5 years ago (9910838)
Posted by Muskan Chaturvedi 5 years ago (9056200)
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Yogita Ingle 5 years ago (2577571)
The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged). Atoms have different properties based on the arrangement and number of their basic particles.
Posted by Mandeep Singh 5 years ago (7224056)
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Yogita Ingle 5 years ago (2577571)
Socialist ideology thus has both critical and constructive aspects. Critically, it provides an account of what’s wrong with capitalism; constructively, it provides a theory of how to transcend capitalism’s flaws, namely, by transcending capitalism itself, replacing capitalism’s central features (private property, markets, profits) with socialist alternatives (at a minimum social property, but typically planning and production for use as well).
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Yogita Ingle 5 years ago (2577571)
Greenhouse effect is the process by which radiations from the sun are absorbed by the greenhouse gases and not reflected back into space. This insulates the surface of the earth and prevents it from freezing.
Greenhouse gases are the gases that absorb the infrared radiations and create a greenhouse effect. For eg., carbondioxide and chlorofluorocarbons
Posted by Bena Sailo 5 years ago (9491212)
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Yogita Ingle 5 years ago (2577571)
The Islamic prophet Muhammad came to Medina following the migration of his followers in what is known as the Hijra (migration to Medina) in 622. He had been invited to Medina by city leaders to adjudicate disputes between clans from which the city suffered. He left Medina to return to and conquer Mecca in December 629.
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Harsh Janghu 5 years ago (5276189)
Yogita Ingle 5 years ago (2577571)
Joule’s law of heating states that, when a current ‘i ' passes through a conductor of resistance ‘r’ for time ‘t’ then the heat developed in the conductor is equal to the product of the square of the current, the resistance and time.
Chirag Anand 5 years ago (9412776)
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Yogita Ingle 5 years ago (2577571)
Ammonia is a base but doesn’t contain any hydroxyl group because it forms OH- ions when it is added to water.
In water, ammonia forms ammonium hydroxide. While adding water, ammonia ionises for forming the ions of ammonium and hydroxide ions.
In water, ammonia accepts the protons which are provided by dissociation of water. Water in this case which acts as an ‘acid’ and since ammonia accepts these protons, which it acts as a ‘base’.
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