Please select a subject first
Draw the welllabelled 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
A three digit number is equal to 17 times the sum of its digits. If 198 is added to the number, the digits are interchanged. The addition of first and third digit is 1 less than middle digit. Find the number.
Concept: Algebraic Methods of Solving a Pair of Linear Equations > Substitution Method
Solve the following quadratic equation for x: `4x^2 + 4bx – (a^2 – b^2) = 0`
Concept: Solutions of Quadratic Equations by Completing the Square
Read the following extract and complete the table given below about 'Types of Diseases':
Health is defined as not simply the absence of disease. It involves a state of feeling well, both in body and in mind.
The diseases may be classified into the following types, Some diseases are present at birth. They are called congenital diseases. They may develop during pregnancy or are inherited, Some of them may be caused by environmental factors. Examples of congenital diseases are Down's syndrome, sickle cell anaemia, cystic fibrosis, haemophilia, etc.
Some diseases are acquired by humans themselves and hence are called SelfInflicted or Acquired diseases. Examples of acquired diseases are coronary heart diseases, hypertension.
Some diseases are transmitted from one person to another. They are called as Communicable or Infectious diseases. They are caused by biological agents, Examples of communicable diseases are Cholera, Typhoid, Measles, Malaria, etc.
Non communicable diseases are caused by exogenous factors like physical, chemical, nutritional deficiencies. The examples are Kwashiorkor, Pellagra, Scurvy, and Rickets, etc.
Title
Sr.No.  Types  Causes 
Examples 
1.  Congenital 
o develop during pregnancy o environmental factors 

2.  SelfInflicted Acquired  Coronary heart disease. hypertension  
3.  By biological agents  Cholera, typhoid, measles, malaria  
4.  Noncommunicable diseases  Kwashiorkor, Pellagra, Scurvy, and Rickets 
Concept: Writing Skill
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
Write the first two terms of the sequence whose nth term is t_{n} = 3n ‒ 4.
Concept: Arithmetic Progression
The 11^{th} term and the 21^{st} term of an A.P. are 16 and 29 respectively, then find:
(a) The first term and common difference
(b) The 34^{th} term
(c) ‘n’ such that t_{n} = 55
Concept: Arithmetic Progression
How many three digit natural numbers are divisible by 5?
Concept: Introduction to Sequence
Write the quadratic equation whose roots are ‒2 and ‒3.
Concept: Quadratic Equations
The divisor and quotient of the number 6123 are same and the remainder is half the divisor. Find the divisor.
Concept: Quadratic Equations Examples and Solutions
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
Write the sample space for selecting a day randomly of the week.
Concept: Sample Space
In a certain race, there are three boys A, B, C. The winning probability of A is twice than B and the winning probability of B is twice than C. If P(A) + P(B) + P(C) = 1, then find the probability of win for each boy.
Concept: Probability Examples and Solutions