Please select a subject first

Draw the well-labelled diagram of the human excretory system

Concept: Concept of Excretion

Principle of Electric motor

Concept: Electric Motor

Principle of Electric motor

Concept: Electric Motor

Why does the sun appear reddish early in the morning? Will this phenomenon be observed by an observer on the moon? Justify your answer with a reason.

Concept: Some Natural Phenomena Due to Sunlight

State the laws of refraction of light.

Concept: Refraction of Light > Refraction Through a Rectangular Glass Slab

Solve the following quadratic equation for x: `4x^2 + 4bx – (a^2 – b^2) = 0`

Concept: Solutions of Quadratic Equations by Completing the Square

**Explain whether the statements is true of false with reasons**

The nature of the Constitution is seen as a living document

Concept: Role of Judiciary > The Basic Framework of the Constitution

Explain sex determination in human beings.

Concept: Sex Determination > Sex Determination in Humans

How many three digit natural numbers are divisible by 5?

Concept: Introduction to Sequence

If α + β = 5 and α^{3} +β^{3} = 35, find the quadratic equation whose roots are α and β.

Concept: Quadratic Equations

If the quadratic equation px^{2} − 2√5px + 15 = 0 has two equal roots then find the value of p.

Concept: Nature of Roots

If 12x +13y =29 and 13x +12y=21, find x + y.

Concept: Linear Equations in Two Variables Applications

**Identify the correct correlation and make a chain.**

A |
B |
C |

1) Ganga river |
i) Pau Brasil |
a) trees shed their leaves |

2) Amazon river |
ii) sediments deposit |
b) there are islands at its mouth |

3) Brazil |
iii) Teak trees |
c) country named after it |

4) Deciduous forests |
iv) no sediments |
d) distributaries at the at the mouth |

Concept: Name of the Country : Federative Republic of Brazil

In the following figure, in ΔPQR, seg RS is the bisector of ∠PRQ. If PS = 6, SQ = 8, PR = 15, find QR.

Concept: Similarity of Triangles

If two circles with radii 8 cm and 3 cm, respectively, touch internally, then find the distance between their centers.

Concept: Touching Circles

In Fig. 3, AP and BP are tangents to a circle with centre O, such that AP = 5 cm and ∠APB = 60°. Find the length of chord AB.

Concept: Areas of Sector and Segment of a Circle

A farmer connects a pipe of internal diameter 20 cm from a canal into a cylindrical tank which is 10 m in diameter and 2 m deep. If the water flows through the pipe at the rate of 4 km per hour, in how much time will the tank be filled completely?

Concept: Surface Area of a Combination of Solids

Complete the table.

James Mill |
The History of British India |

James Grant Duff | __________________ |

__________________ | The History of India |

Shripad Amrut Dange | ___________________ |

___________________ | Who Were the Shudras |

Concept: Development of Scientific Perspective in Europe and Historiography

**Explain the statement with reason.**

Writing of the regional history received a momentum.

Concept: Indian Historiography : Various Ideological Frameworks > Nationalistic Historiography

**Choose the correct alternative and write the complete statement .**

The essence of democracy is ....................

Concept: Decentralisation of Democracy