NCERT Books Class 9

Download NCERT Science, Maths, Social Science (Geography, History, Political Science, Economics) books chapterwise of class 9 in pdf form for free. Free download NCERT books of class 10 Free download NCERT books of class 8

Class 9 Tissues Important Questions

Tissues Important Questions Which tissue in plants provides them flexibility? Name any two parts of the plants where this tissue is present. What is responsible for increase in girth of the stem or root? What is cutin? What is its function? Which tissue forms a barrier to keep different body systems separate? Write the differences […]

Class 9 Triangles Important Questions

Triangles Important Questions Line l is the bisector of an angle ∠A and B is any point on l. BP and BQ are perpendiculars from B to the arms of ∠ A. Show that: ΔAPB ≅ ΔAQB BP = BQ or B is equidistant from the armsof ∠A. In ΔABC, ∠A – ∠B = 33° […]

Class 9 Lines and Angles Important Questions

Lines and Angles Important Questions The diagonals of the rectangle ABCD intersect at O. If ∠COD = 78°, then ∠OAB is: 35o 51o 70o 110o If AB = x + 3, BC = 2x and AC = 4x – 5, then for what value of ‘x’, B lies on AC? 2 3 5 8 In the given Figure , […]

Class 9 Gravitation Important Questions

Gravitation Important Questions An object is thrown vertically upward and rises to height of 10 m. Calculate the (i) the velocity by which the object was thrown upward and (ii) the time taken by object to reach the highest point. The mass of earth is 6.4 x 1024 kg and that of the moon is […]

Class 9 The Fundamental Unit of Life Important Questions

The Fundamental Unit of Life Important Questions Define nucleoid. . Why mitochondria is called the powerhouse of the cell ? Why is the inner membrane of mitochondria deeply folded ? Where is protein synthesized in a cell ? Explain. Name the three solutions that can be used to stain the cell while observing it under […]

Class 9 Polynomials Important Questions

Class 9 Polynomials Important Questions Using suitable identity determine the value of :- (17)3 + (-12)3 + (-5)3 64m3 – 343n3 Factorise :- 2y3 – 4y2 – 2y + 4 2×2 + 7x + 3 Factorise : (a-b)3 + (b-c)3 + (c-a)3 If (a + b + c) = 15 and a2 + b2 + […]

Class 9 Atoms and Molecules Notes

Atoms and Molecules Notes Laws of chemical combination:- Law of conservation of mass:- It states that mass can neither be created nor be destroyed in a chemical reaction. Or,It states that the total mass of reactants is equal to total mass of products in a chemical reaction. Law of constant proportion:- It states that in […]

Class 9 Tissues Notes

Tissues Notes Tissue:- A group of cells that are similar in structure and perform a particular function is called tissue. Differences between plant tissue and animal tissue:- Plant Tissues Animal Tissues Most of the plant tissues are dead that provide mechanical support. Most of the animal tissues are living . Plant tissues consume less energy. […]