Forum

Determinants

Define the determinant of a 2×2 matrix and explain its significance. Find the determinant of a matrix with elements 2, 3 in the first row and 4, 5 in the second row.

05/11/2024

Mathematics

12th (Science)

Ruling the countryside

Fill in the blanks:
(a) Growers of woad in Europe saw __________
as a crop which would provide competition
to their earnings.
(b) The demand for indigo increased in late
eighteenth-century Britain because of
__________.
(c) The international demand for indigo was
affected by the discovery of __________.
(d) The Champaran movement was against
__________.

05/11/2024

SST

8th

Matrices

Define a square matrix and explain the concept of the transpose of a matrix. Show that the transpose of a symmetric matrix is itself.

05/11/2024

Mathematics

12th (Science)

Ruling the countryside

Match the following:
ryot village
mahal peasant
nij cultivation on ryot’s lands
ryoti cultivation on planter’s own land

05/11/2024

SST

8th

Inverse Trigonometric Functions

Explain the concept of inverse trigonometric functions. Solve for x if sine inverse of x plus cosine inverse of x equals pi over 2.

05/11/2024

Mathematics

12th (Science)

Relations and Functions

Define a one-one function and an onto function. Give an example of a function that is both one-one and onto.

05/11/2024

Mathematics

12th (Science)

Thermodynamics

Define enthalpy of formation. Using Hess’s law, explain how it is used to determine the enthalpy of reaction.

05/11/2024

Chemistry

12th (Science)

States of Matter

Explain Charles’s law and its significance. Describe an experiment to demonstrate Charles’s law.

05/11/2024

Chemistry

12th (Science)

Chemical Bonding and Molecular Structure

Explain the concept of hybridization. Describe the hybridization of carbon in methane, ethene, and ethyne.

05/11/2024

Chemistry

12th (Science)

Atomic Structure

State Hund’s rule and explain its significance in determining the electronic configuration of elements.

05/11/2024

Chemistry

12th (Science)