SUBHAM TUTORIAL

Acids, Bases and Salts CBSE Class 7 Important Question and Answers Acids, Bases and Salts Q 1. Name the following: (i) Substances which gives hydronium ion ( H+) in solution. Ans: Acids (ii) Substances which turn blue litmus solution red.   Ans: Acids (iii) Substances which gives hydroxyl ion (OH-) in solution.     Ans:   Bases (iv) Substances which turn turmeric paper red.   Ans:     Bases (v) Chemical name for salt which we consume everyday.   Ans:      Sodium Chloride (vi) Base used as foaming agent in fire extinguisher.   Ans:   Sodium Hydrogen Carbonate (vii) A commonly used antacid.     Ans:  Baking Soda (viii) The substances on which litmus solution has no effect.  Ans:   Neutrals (ix) The colour of turmeric solution in soap solution.   Ans:     Red (x) Examples of any two mineral acids and organic acids.   Ans:   Mineral Acids: a)...

                    subham tutorial                       science chapter  4                                     HEAT Questions:- 1. An example of the conductors of heat is A) Aluminium B) Wood C) Plastic 2. An example of the conductors of heat is A) Plastic B) Iron C) Wood 3. An example of insulators of heat is A) Wood B) Aluminium C) Iron 4. An example of insulators of heat is A) Aluminium B) Plastic C) Iron 5. The hotness of an object is determined by its __ __. A) Pressure B) Temperature C) Neither a or b D) Both a and b 6. Temperature of boiling water cannot be measured by a __ __ thermometer. A) Celcius B) Clinical 7. Temperature is measured in degree ___ _. A) Celcius B) Clinical 8. No medium is required for transfer of heat by the process...

                           SUBHAM TUTORIAL                                    Class vii                           Science chapter 4                         HEAT                 BRIEFLY CHAPTER NOTES           Hot and Cold → The measure of degree of hotness or coldness of a substance is called its temperature. → The device that is used to measure the temperature of a substance is called thermometer. Measuring Temperature → Thermometers are of two types: (i) Clinical thermometer: Used for measuring temperature of human body. (ii) Laboratory thermometer: Used for measuring temperature of common objects. ...

               SUBHAM TUTORIAL                  CBSE Class 6th  CH 1  Food: Where Does It Come From?                                     (MCQs)                  food : where does it come from      MCQs Q1: What are the ingredients of  preparing  Chapati ? (a) Atta (Wheat Flour) only (b) Water only (c) Both Atta and water (d) None of these Q2: Which of the following is NOT an ingredient for preparing  Dal ? (a) Pulses (b) Kerosene (c) Oil or Ghee (d) Salt Q3: Which one of the following is a carnivore animal? (a) Sparrow (b) Owl (c) Parrot (d) Cow Q4: Materials required to prepare a food item are called (a) Nutrients (b) Ingredients (c) Nourishments (d) Minerals Q5: W...

                              SUBHAM TUTORIAL                                                         Fiber to fabric                          Question no.1          Explain the process involved in obtaining wool. Answer: The processing of fibres into wool involves the following steps: Step I: Shearing: - At first hair are removed using shearing machine Step II: scouring : - Hair is washed in tanks to remove grease, dust and dirt. This process is called scouring. Step III: After scouring, sorting of hair is done on the basic of different textures Step IV: The small fluffy fibres, called burrs,...

                    SUBHAM TUTORIAL                     Physical features of India                      Geography  Chapter 2                                        MCQ Question 1:  Which of the following is responsible for the variation in the colour of soil in different parts of India? (a) Difference in rock formations                                (b) Weathering (c) Erosion and deposition                                            (d) Land use Question 2: Which of the following has not been a factor in the creation and ...