04:03

Let A= {x ∈R : |x +1| greater than 2} and B= {x∈ R : |x -1|equal to or greater than 2}. Then which

06:33

Relations, Representation of Relation, Types of Relations; Domain, Range and Codomain of Relation.

02:47

Out of all the patients in a hospital  89% are found to be suffering from heart ailment and  98% are

07:37

Cartesion Product, Cartesion Product of Two Sets, Cartesion Product of Three Sets

02:16

100 mL of Na3PO4 solution contains 3.45 g of sodium. The molarity of the solution                   

01:45

The minimum number of moles of O2 required for complete combustion of 1 mole of propane and 2 moles

01:45

"Why is the calculation of product yield based on the limiting reactant rather than the excess react

02:48

Production of iron in blast furnance follows the following equation.Fe3O4(s)+4CO(g)→3Fe(l)+4CO2(g)

02:34

Consider the reaction 4HNO3(l) + 3KCl(s) → Cl2(g) + NOCl(g) + 2H2O(g) + 3KNO3(s)  The amount of HNO3

05:21

Chemical Reaction, Chemical Equation, Stoichiometry, Stoichiometric Calculations

01:23

On complete combustion, 0.492 g of an organic compound gave 0.792 g of CO2​. The % of carbon

01:28

Haemoglobin contains 0.34 % of iron by mass. The number of Fe atoms in 3.3 g of haemoglobin is .....

04:59

Atomic Mass, Molecular Mass, Formula Mass, Mole Concept and Molar Mass

01:26

56.0 L of nitrogen gas is mixed with excess of hydrogen gas and it is found that 20 L of ammonia gas

04:35

Law of conservation of mass, Law of definite proportions, Law of multiple proportions, Gay Lussac's

01:38

Using the rules for significant figures, the correct answer for the expression 0.02858×0.112/0.5702

13:56

Uncertainty in Measurement, Scientific Notation, Accuracy and Precision, Significant Figures

08:52

Properties of Matter and their measurement, The International System of Units (SI Units)

05:59

Matter and Material, Physical Classification of Matter, Chemical Classification of Matter.

02:29

Match List-I with List-II:List-I: A. Angular Momentum; B. Torque; C. Stress;  D. Pressure Gradient

01:36

( P + a/V^2 )( V − b ) = R T  represents the equation of state of some gases. Where P is the press

02:37

The equation of a circle is given by x^2 + y^2 = a^2 , where a is the radius. If the equation is mod

02:25

If the velocity of light c, the universal gravitational constant G, and Planck's constant h are

02:07

Velocity (v) and acceleration (a) in two systems of units 1 and 2 are related as v_2=(n/m^2)v_1 and

01:55

In the equation [X+(a/Y^2)][Y-b]=RT; X is pressure,Y is volume,R is universal gas constant and T is

05:04

Dimensional Formula of Physical Quantities

06:36

Dimensions of a Physical Quantity, Dimensional Formula & Equation, Dimensional Analysis and its app.

08:49

Fundamental Quatities and SI Units, Derived Quantities and SI Units

06:28

Units and Measurements, Physical Quantities, Measurement of Physical Quantities, System of Units.

03:30

In a class of 140 students numbered 1 to 140, all even numbered students opted mathematics course,

04:36

Principle of Inclusion-Exclusion (PIE)

01:55

Let A={1,2,3,4,5,6,7} and B={3,6,7,9}. Then the number of elements in the set {C⊆A:C∩A≠∅}  is   ____

04:28

An organization awarded 48 medals in event ' A ', 25 in event ' B ' and 18 in event ' C. If these me

07:14

Venn Diagrams, Operations on Sets, De-Morgan's Law

04:51

Sets and Their Representations, Types of Sets

01:11

What is the concentration, in ppb, if 0.05 mg of salt is dissolved in 1 kg of solution?

01:16

What would be the mass by volume percentage of a solution which is 20% mass by mass?(Density of the

01:15

What would be the volume/volume percent solution if we combine 30 mL of ethanol with enough water to

01:30

Calculate the formality of NaCl solution, 5.85 g of which have been dissolved to form 250 ml of the

01:39

The mole fraction of glucose (C6 H12 O6 ) in an aqueous binary solution is 0.1. The mass percentage

02:05

A 100 mL solution was made by adding 1.43 g of Na2CO3 ·xH2O. The normality of the solution is 0.1 N.

01:30

Ferrous sulphate heptahydrate is used to fortify foods with iron. The amount (in grams) of the salt

02:31

The density of NaOH solution is 250 mL of 0.5 M NaOH was added to 500 mL of 1 M HCl. The number of

02:15

Limiting Reactant, Excess Reactant

01:49

The density of NaOH solution is 1.2 g cm–3 . The molality of this solution is ...... m.  (Round off

04:20

Concentration of Solution, Normality, Molarity, Molality, Formality, Mol Fraction, PPM, PPB

03:19

A body is released from a height equal to the radius (R) of the earth. The velocity of the body when

02:31

Conservation of Mechanical Energy

05:55

Newton's Law of Universal Gravitation, Acceleration due to Gravity(g), Variation of g with Height

01:21

A particle starts with an initial velocity of 10.0ms-1 along x-direction and accelerates uniformly

02:05

A ball is thrown vertically upward with an initial velocity of 150 m/s. The ratio of velocity after

01:32

The velocity time graph of a body moving in a straight line is shown in figure.The ratio of displace

03:31

Quadratic Equation, Roots of Quadratic Equation

05:34

Section Formula: Internal Division and External Division

03:13

Simultaneous Equations, Elimination Method for solving Simultaneous Equations

02:15

Centroid of a Triangle, Derivation of Formula

02:27

Let (α, β) be the centroid of the triangle formed by the lines 15x – y = 82, 6x – 5y = – 4 and 9x +

07:06

Congruence of Triangles, Similarity of Triangles, Criteria for Congruence and Similarity of Triangle

01:39

Two elements A and B which form 0.15 moles of A2B and AB3 type compounds. If both A2BandAB3 weigh eq

02:26

120 g of an organic compound that contains only carbon and hydrogen gives 330 g of CO2 and 270 g of