Ask questions, doubts, problems and we will help you..
Ask questions which are clear, concise and easy to understand.
Ask Question
CBSE, JEE, NEET, CUET
Question Bank, Mock Tests, Exam Papers
NCERT Solutions, Sample Papers, Notes, Videos
Posted by Zafar Hussain 5 years, 3 months ago (9757230)
- 0 answers
Posted by Puspa Patail 5 years, 3 months ago (9750552)
- 0 answers
Posted by Dinkar Divana 3 years, 3 months ago (9874679)
- 1 answers
Posted by Soumya Rajput 5 years, 3 months ago (8923216)
- 1 answers
Posted by Anahika Rana 5 years, 3 months ago (9125226)
- 2 answers
Posted by Sanj Ana 5 years, 3 months ago (9814342)
- 0 answers
Posted by Dgf Chd 5 years, 3 months ago (4635669)
- 0 answers
Posted by Tanya ?? 5 years, 3 months ago (9516882)
- 1 answers
Yogita Ingle 5 years, 3 months ago (2577571)
Enthalpy is defined as the sum of internal energy of a system and the product of its pressure and volume. It is denoted by the symbol E. It is a state function. Units used to express are calorie, BTU, or joules. Below we have given the equation.
Enthalpy Equation:
E= U + PV where,
E is the enthalpy
U is the internal energy of a system
P is the pressure
V is the volume
Entropy is defined as the measure of the thermal energy of a system per unit temperature which is not available for doing useful work. It is denoted as S. The SI unit for Entropy is Joules per Kelvin. Entropy change at constant temperature is calculated as given below:
ΔSsystem = qrev / T
ΔS represents the change in entropy,
qrev represents the reverse of the heat, and
T is the temperature in the Kelvin scale.
Posted by Tanya ?? 5 years, 3 months ago (9516882)
- 1 answers
Yogita Ingle 5 years, 3 months ago (2577571)
Normality in chemistry is one of the expressions used to measure the concentration of a solution. It is abbreviated as ‘N’ and is sometimes referred to as the equivalent concentration of a solution. It is mainly used as a measure of reactive species in a solution and during titration reactions or particularly in situations involving acid-base chemistry.
Example:
n the following reaction calculate and find the normality when it is 1.0 M H3PO4
H3AsO4 + 2NaOH → Na2HAsO4 + 2H2O
Solution:
If we look at the given reaction we can identify that only two of the H+ ions of H3AsO4 react with NaOH to form the product. Therefore, the two ions are 2 equivalents. In order to find the normality, we will apply the given formula.
N = Molarity (M) × number of equivalents
N = 1.0 × 2 (replacing the values)
Therefore, normality of the solution = 2.0.
Posted by Chaaru Mithra 5 years, 3 months ago (8947339)
- 0 answers
Posted by Priya Tiwari 5 years, 3 months ago (9516808)
- 1 answers
Parthiv Patel 5 years, 3 months ago (7167011)
Posted by Eshanee Das 5 years, 3 months ago (8307130)
- 1 answers
Yogita Ingle 5 years, 3 months ago (2577571)
Religious beliefs of Indus valley people are always hard to determine because of the minimum number of archaeological evidence.
For example, earlier discoveries emphasized that Indus valley civilization worshiped a mother goddess symbolizing fertility. But later discoveries that displayed swastika. Many discoveries from the Indus valley is emphasizing that the Indus people must have worshiped many gods and they have many religions in them.
The contradiction between discoveries made the religious beliefs of Indus valley people so hard to determine and reconstruct the religious practices of Harappa.
Posted by Royal Thakur? 5 years, 3 months ago (9870898)
- 0 answers
Posted by Chaaru Mithra 5 years, 3 months ago (8947339)
- 0 answers
Posted by Chaaru Mithra 5 years, 3 months ago (8947339)
- 2 answers
Posted by Chaaru Mithra 5 years, 3 months ago (8947339)
- 2 answers
Posted by Samrat Gundgal 5 years, 3 months ago (9282688)
- 2 answers
Rudranshu Mishra 5 years, 3 months ago (1938086)
Yogita Ingle 5 years, 3 months ago (2577571)
Ratio of the sides of the triangle = 12 : 17 : 25
Let the common ratio be x then sides are 12x, 17x and 25x
Perimeter of the triangle = 540cm
12x + 17x + 25x = 540 cm
⇒ 54x = 540cm
⇒ x = 10
Sides of triangle are,
12x = 12 × 10 = 120cm
17x = 17 × 10 = 170cm
25x = 25 × 10 = 250cm
Semi perimeter of triangle(s) = 540/2 = 270cm
Using heron's formula,Area of the triangle = √s (s-a) (s-b) (s-c)
= √270(270 - 120) (270 - 170) (270 - 250)cm2
= √270 × 150 × 100 × 20 cm2
= 9000 cm2
Posted by Shweta Singh 5 years, 3 months ago (8889950)
- 2 answers
Somya Ranka 5 years, 3 months ago (7241139)
Harshit Pandey 5 years, 3 months ago (9871440)
Posted by Yogita Gamer 5 years, 3 months ago (9868508)
- 1 answers
Sourav Keshri 5 years, 3 months ago (8992559)
Posted by Tanmay Sejwal 5 years, 3 months ago (7739291)
- 0 answers
Posted by Abhishek Shrivastav 5 years, 3 months ago (9874561)
- 4 answers
Ridhima Sharma 5 years ago (10507343)
Zainab Fatema Charaniya 5 years, 2 months ago (10006779)
Aryan Magar 5 years, 3 months ago (9814824)
Yogita Ingle 5 years, 3 months ago (2577571)
Joints in the human body is where bones are connected.
The hinge joint includes ankle, elbow, knee and interphalangeal joints.
Posted by Priya Subhashini 5 years, 3 months ago (9767547)
- 1 answers
Ajjsjsjjdjka Jsjsjsjsja 5 years, 3 months ago (3469985)
Posted by Sudhanshu Kumar Yadav 5 years, 3 months ago (9869639)
- 1 answers
Yogita Ingle 5 years, 3 months ago (2577571)
Federalism in India is practised by the creation of linguistic states ,language policy and centre state relations.
Linguistic states:- in 1947 ,the boundaries of several old states were changed in order to create new states . This was done to ensure that people who spoke the same language lived in the same state .Some of them were not only created on the basis of language but to recognise differences based on culture, ethnicity or geography. For example:- Nagaland,Uttrakhand and Jharkhand.
Language policy:- Our constitution did not give the status of national language to any one language. Hindi was identified as the official language. But it is the mother tongue of only about 40% of Indians Therefore they were many safeguards to protect other languages. Besides Hindi,there are 21other languages recognisddras scheduled languages by the Indian constitution.
Centre - State relations :- Reconstructing the centre state relations in one more way in which federalism has been strengthened in practice. Since, 1990 coalition government were at the centre . No single party got a clear majority in the lok sabha, the major national parties had to enter into an alliance with many parties including several regional parties to form a government at the centre. This led to a new culture of power sharing at the centre. This led to a new culture of power sharing amd respect for the autonomy of the State Governments.
Posted by Jagadeesh Pentakota 5 years, 3 months ago (9874607)
- 1 answers
Akhya Sahay 5 years, 3 months ago (4613206)
Posted by Tanya Yadav M. 5 years, 3 months ago (9872186)
- 2 answers
Tanya Yadav M. 5 years, 3 months ago (9872186)
Posted by Vishwatej Gaikwad 5 years, 3 months ago (9321069)
- 0 answers
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
