CBSE Pathshala

Q.1. Draw the graph of 2y = 4x – 6      2x = y+ 3 And determine whether this system of linear equation has a unique solution of not. Q.2. solve the following system of linear equation: 5x – 6y + 30 = 0                      5x + 4y – 20 =0 Find the vertices of the triangle formed by the above two lines and x-axis. Q.3. solve graphically the system of linear equation: 4x – 3y + 4 = 0                        4x + 3y – 20 = 0 Find the area of the region bounded by these lines and x-axis. Q.4. find value of k for which the systems of equation have a unique solution: X – ky = 2                   3x + 2y = -5 Q.5. find value of k for which the systems of e...

Assignment Chemistry + Physics IX Summative assessment-1 1. You are provided with a mixture of naphthalene and ammonium chloride by your teacher. Suggest an activity to separate them with well labeled diagram.  2. You want to wear your favorite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster? 3. Comment on the following statements: (a) Evaporation produces cooling. (b) Rate of evaporation of an aqueous solution decreases with increase in humidity. (c) Sponge though compressible is a solid. 4. (a) Conversion of solid to vapour is called sublimation. Name the term used to denote the conversion of vapour to solid. (b) Conversion of solid state to liquid state is called fusion; what is meant by latent heat of fusion? 5. Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam ...

Assignment - class-X Chemistry   Summative assessment-1 1. Write the balanced chemical equations for the following reactions and identify the type of reaction in each case. (a) Thermite reaction, iron (III) oxide reacts with aluminum and gives molten iron and aluminum oxide. (b) Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride. (c) Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine. (d) Ethanol is burnt in air to form carbon dioxide, water and releases heat. 2. Which among the following changes are exothermic or endothermic in nature? (a) Decomposition of ferrous sulphate                (b) Dilution of sulphuric acid (c) Dissolution of sodium hydroxide in water     (d) Di...

X Statics mean median mode and Ogive MULTIPLE CHOICE QUESTIONS 1. If 35 is the upper limit of the class-interval of class-size 10, then the lower limit of the class-interval is : (a) 20                                                               (b) 25 (c) 30                                                               (d) none of these ...