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## FREE Online GS Subject wise Quiz

10 random questions for 10 mins
(Unlimited Attempts)

## Moving charges and magnetism (part-1)

Feb 1, 2013

To describes how an electric field affects and is affected by a medium , we can use Electric permittivity. It is determined by the ability of a material to polarise in response to an applied field, and thereby to cancel, partially, the field inside the material.

## Probability (part-2)

Feb 1, 2013

We can express probability as: the number of occurrences of a targeted event divided by the number of occurrences plus the number of failures of occurrences.

## Linear Programming (part-2)

Feb 1, 2013

Linear optimization is the alternate name given to the term linear programming. Sometimes it also known as, is the problem of maximizing or minimizing a linear function over a convex polyhedron. Simplistically, linear programming is the optimization of an outcome based on some set of constraints using a linear mathematical model.

## Linear Programming (part-1)

Feb 1, 2013

Linear optimization is the alternate name given to the term linear programming. Sometimes it also known as, is the problem of maximizing or minimizing a linear function over a convex polyhedron. Simplistically, linear programming is the optimization of an outcome based on some set of constraints using a linear mathematical model.

## Three-dimensional Geometry (part-2)

Jan 31, 2013

Angle between skew lines is the angle between two intersecting lines drawn from any point (preferably through the origin) parallel to each of the skew lines.

## Three-dimensional Geometry (part-1)

Jan 31, 2013

In this video we will talk about the direction cosines and direction ratios of a line joining two points and also discuss about the equations of lines and planes in space under different conditions, angle between two lines, two planes, a line and a plane, shortest distance between two skew lines and distance of a point from a plane

## Vectors Algebra (part-2)

Jan 31, 2013

The vector sum of two coinitial vectors is given by the diagonal of the parallelogram whose adjacent sides are the given vectors.

## Vectors Algebra (part-1)

Jan 31, 2013

The quantity which involves only one value (magnitude) which is a real number is called as scalars. However, an answer to the second query is a quantity (called force) which involves muscular strength (magnitude) and direction (in which another player is positioned). Such quantities are called vectors.

## Differential Equations (part-2)

Jan 31, 2013

To solve no homogeneous ordinary differential equations we must know the general solution to the homogenous version, in which case the undetermined coefficients method or variation of parameters can be used to find the particular solution.

## Differential Equations (part-1)

Jan 31, 2013

In this video we will discuss about the general and particular solution of a differential equation. By the degree of a differential equation, when it is a polynomial equation in derivatives, we mean the highest power (positive integral index) of the highest order derivative involved in the given differential equation.

## Integrals (part-1)

Jan 31, 2013

The functions that could possibly have given function as a derivative are called anti derivatives (or primitive) of the function

## Applications of the Integrals (part-2)

Jan 31, 2013

In this video we have given a focused on the applications of integrals in all the examples that you are capable of doing the integrals.

## Applications of the Integrals (part-1)

Jan 31, 2013

In the topic geometry, we have learnt formulae to find areas of different geometrical figures including triangles, rectangles, trapezias and circles.

## Applications of Derivatives (part-2)

Jan 30, 2013

Approximate is an estimation of a number or rounding a number to its nearest place value.

## Applications of Derivatives (part-1)

Jan 30, 2013

In the topic tangents and normals, we will use differentiation to find the equation of the tangent line and the normal line to a curve at a given point.

## Continuity and Differentiability (part-2)

Jan 30, 2013

Sometimes the relation between two variables is neither explicit nor implicit, but some link of a third variable with each of the two variables, separately, establishes a relation between the first two variables.

## Continuity and Differentiability (part-1)

Jan 30, 2013

Continuity of a function at a point is entirely dictated by the limit of the function at that point, it is reasonable to expect results analogous to the case of limits.

## Chemistry in Everyday Life

Jan 29, 2013

Molecules having molecular masses (~100 – 500u) comes under the category of drugs. These interact with macromolecular targets and produce a biological response.

## Polymer (part-2)

Jan 29, 2013

Step-growth polymerization follows only one type of reaction mechanism for the formation of polymer. The distinct initiation, propagation, and termination steps of chain-growth polymerization are meaningless in step-growth polymerization.

## Polymer (part-1)

Jan 29, 2013

Molecules of a polymer has high molar masses and are composed of a large number of repeating units. There are both naturally occurring and synthetic polymers

## Biomolecules (part-2)

Jan 29, 2013

Enzymes are also a form of proteins that facilitate biochemical reactions. They are also work as catalysts because they speed up chemical reactions. Examples include the enzymes lactase and pepsin.

## Biomolecules (part-1)

Jan 29, 2013

Carbohydrates are defined as optically active polyhydroxy aldehydes or polyhydroxy ketones or compounds which give such compounds on hydrolysis

## Amines (Part-1)

Jan 28, 2013

Amines are organic compounds which are basic in nature and contain nitrogen atom as central one. The general form of an amine is shown in Lewis form. R represents an alkyl group, but either or both of the hydrogens may be replaced by other groups and still retain its class as an amine.

## Amines (Part-2)

Jan 28, 2013

Lower aliphatic amines have the property to form hydrogen bond with water molecule and because of this they are soluble in water. However, solubility decreases with increase in molar mass of amines due to increase in size of the hydrophobic alkyl part

## Haloalkanes and Haloarenes (Part-1)

Jan 28, 2013

Alkyl halides form a homologous series represented by CnH2n+1X. The alkyl halides are further classified as primary, secondary or tertiary according to the nature of carbon to which halogen is attached.

## Haloalkanes and Haloarenes (Part-2)

Jan 28, 2013

The solubility of Haloalkanes in the water is very less as compare to organic solvent. In order for a haloalkane to dissolve in water, energy is required to overcome the attractions between the haloalkane molecules and break the hydrogen bonds between water molecules.

## Coordination Compounds (Part-1)

Jan 28, 2013

Concept of a primary valence and a secondary valence for a metal ion was also proposed by Werner. Binary compounds such as CrCl3, CoCl2 or PdCl2 have primary valence of 3, 2 and 2 respectively.

## Coordination Compounds (Part-2)

Jan 28, 2013

Coordination compounds are of great importance. You can find the presence of coordination compounds in the mineral, plant and animal worlds. They play many important functional roles in the area of analytical chemistry, metallurgy, biological systems, industry and medicine.

## Environmental Issues (Part-1)

Jan 25, 2013

When two or more agents, entities, factors, or substances interact between each other, they produce more effect rather than the sum of their individual effect. This is termed as synergetic effect or synergistic effect. It is opposite of antagonism.

## Environmental Issues (Part-2)

Jan 25, 2013

The term acid rain can be defined as the mixture of wet and dry deposition (deposited material) from the atmosphere containing higher than normal amounts of nitric and sulfuric acids.

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