Students and Teachers Forum
The atomic number of chlorine is 17 and it's electronic configuration is 2,8,7. Since, it has 7 valence electrons in it's outermost shell and it needs one electron to complete it's octet. It's valency is .....
A very warm good morning to all. Respected teacher, and all my dear friends, Today I am going to present a speech on "International .....
Generally speaking, the term ‘capital’ refers to any financial resources or assets owned by a business that are useful in furthering development and generating income. Capital is a term for financial assets, as well as for tangible .....
Nepal is rich in natural resources such as soil, forest, water and scenery. But these resources no matter how much potential they possess can do nothing by themselves for development. They have to be mobilized by skilled human .....
Given, mass of iron ball stone in air = 400 g mass of water displaced = 53 g mass of iron ball stone in water = ? Now, mass of ball in water = total mass of ball in air - mass of water displaced Now, can you calculate yourself .....
Carbon dioxide is one of the most abundant gasses in the atmosphere. Carbon dioxide plays an important part in vital plant and animal process, such as photosynthesis and respiration. Green plants convert carbon dioxide and water into food .....
Answer: Carbon dioxide gas is an acidic gas, so it turns blue colour of litmus paper into red. So, carbon dioxide gas can be tested with the help of moist blue litmus paper. Explanation: The main use of litmus is to test whether a solution is .....
Ammonia is lighter than air. So, it is collected by the downward displacement of air in an inverted gas .....
Carbon dioxide Ammonia It is colourless, odourless and tasteless gas. It is colourless gas with a pungent smell. It is a heavier gas. It is lighter than air. It is acidic in nature. It is basic .....
Here, Here, A(2, 3) & B(6, 8) We know, Vector AB = x2 - x1y2 -y1 = 6 - 28 -3 = 45, whch is in column .....
1. Testes are located in scrotum. They secret male sex hormones. They helps in the development of male accessory glands and controls the development of secondary sex characteristics such as the development of moustache, beards, change of voice, .....
Here, Here, A(2, 3) & B(6, 8) We know, Vector AB = x2 - x1y2 -y1 = 6 - 28 -3 = 45, whch is in column .....
Here, Here, horizental displacement = 5 = x-component Vertical displacement = 6 = y-component Thus, Vector a = 56, whch is in column .....
a. Thyroid gland is located in the neck Thyroxin is produced by thyroid gland. It increase the rate of metabolism for the release of energy. b. Parathyroid gland is attached to the dorsal side of thyroid. The hormone produced by parathyroid is .....
Thyroid gland lies in the neck. Thyroxin is secreted by thyroid gland. It increases the rate of metabolism for the release of energy. Over secretion of this hormone leads to the exopthalmic .....
The function of nervous system are: To collect sensory input from the body and external environment. To process and interpret the sensory input. To respond to .....
The hormone glucagon increases the level of sugar in the blood and insulin decreases the glucose level in the blood. They plays a vital part in maintaining the correct blood sugar level. They are .....
Nepal agreed Kyoto Protocal on 12 December 2005. Kyoto Protocal was decleared in December 1997, which was brought in action in 2005 AD only. It targeted to reduce the emission of CO2 at the rate of 5.2% between 2008 to 2012 AD. This period .....
The brain is made up of nervous tissue which is covered with three membranes together, called meninges. The outer one is known as duramater, middle is called arachnoid mater and inner one is the pia .....
The slogan for Agend 21 is 'Think globally and act locally'. Agenda 21 is the program related to the achievment of sustainable development and climate change minimization and mitigation for environmantal conservation. The 21 stands .....
Answer: Afferent nerves carry impulses from various parts of the body to the brain or to the spinal cord where as efferent nerves carry impulses from the brain or the spinal cord to various parts of the body. Explanation: The nerve are the bundles .....
Answer: Endocrine glands are very important even they are small in size because they are responsible for regulating our metabolism, sexual growth, adrenaline when we need to escape dangerous situations, maintaining normal blood sugar level, body .....
Answer: The valency of an element depends upon the number of electrons in the outer most orbit of the atom. The valency is equal to eight minus the number of electrons in the outer shell. The total number of electrons which are gained or .....
The local adaptational programs for climate change are running for local and rular communities of Nepal. Four guideline principles are adopted in local adaption program for climate change. The four guideline principles are bottom-up, .....
Here, Volume of wall = L ⨯ B ⨯ H =20m ⨯ 0.5m ⨯ 1.5m = 15m3. .....
Electronic configuration of sodium Na = 2, 8, 1. It donates 1 electrons and acquire its stable gas configuration. It is easy to donate 1 electron rather than to accept 7 electrons. Hence, sodium has a valency of 1. The atomic number .....
Here, cosx =3/5 ⟹ sinx = √(1 - cos2x) = 4/5. siny =12/15 ⟹cosy = .....
Here, Area of slab = length x breadth = 50cm x 50cm = 0.25m2 No. .....
The total number of people living in a certain place at a certain time may be defined as the population of the given place. Population management is the concept of maintaining a healthy balance between the number of people and resources available .....
A storybook is being read by .....
A very high percent of people of Nepal still lives below the poverty line. Due to difficult and rugged mountainous terrain, many regions of Nepal still basic infrastructures of development like school, hospitals, roads and others. Nuclear energy .....
Here, Angle between the line = θ = 45o Slope of line 4x - 6y = 1 is m1 .....
Here, We have given, 3y = 3 - 2x or, 2x + 3y= 3. Slope of this line = m1 = - coefficient of x / .....
Here, We have given, x + 2y = 3............(i) and y = 3x - 2...............(ii) Solving (i) & (ii), x + 2(3x - 2) = 3 or, 7x = 7 or, x = 1. Put x = 1 in .....
Answer: The following conditions are required to form mineral oil: a. Mineral oils are formed by the remains of phytoplankton and zooplankton that are buried under the ocean bed by natural disasters such as earthquakes and .....
Contemporary happenings or the events may be defined as the events happened just recently. One should remain updated to the recent events because: it helps to remain the individual updated to the current happenings both in local and global .....
Here, $ 176 = ₤ 100 ₤1 = Rs.119 Rs.8925 =$ x (say) Using chain rule , we get 176 ⨯ 8925 = 100 ⨯ 119 ⨯ x or, x = 1870800 / 11900 = 132. Thus, $132 can be exchanged in .....
अग्लो केटो नयाँ कोट लगाउँछ । यस वाक्यमा अग्लो उद्देश्य विशेषण हो । नयाँ चाहिँ विधेय .....
We know, 1 m3 = 1000 liters. So, 15 m3 = 15 x 1000 liters. = 15000 liters. Thus, .....
The work of protecting the constitution is done by the judiciary. Judiciary is one of the most essential organs of government. It interprets the law, guards the rights of the people, punishes the wrongdoer and award the law follower. The .....
Here, P, Q, R and S are respectively the mid-point of AB, BC, CD and AD of quad.ABCD so quadrilateral PQRS is a parallelogram. Also since, triangle(PQB)~triangle (ABC) .....
Since the prism is formed by joining two cubes each of length 6 cm. Volume of a cube = l3 = 63 [ Given, length = 6cm ] = 216 cm3 Since there are 2 such cubes, Total volume of prism = 2 ∗ 216 = 432 .....
All 193 members of the United Nations are required to make payments to certain parts of the organization as a condition of membership. The amount each member must pay is known as its assessed contribution. This varies widely and is determined by a .....
Gargi and Maitreyi were the two women power of ancient India. Maitreyi was a Hindu philosopher who lived during the later Vedic period in ancient India. Maitreyi was estimated to have lived around the 8th century BCE. Gargi Vachaknavi (born about .....