Experiment A Aim To study the properties of acids (dilute HCl) by their reaction withi) Litmus solution (Blue/Red)ii) Zinc metaliii) Solid Sodium Cabonate Materials Required Test tubes Test tube stand Delivery tube with cork Litmus solutions (blue and red) Zinc metal (granulated) Solid sodium carbonate Sodium hydroxide solution Distilled water Lime water Principle An acid […]
Aim To find the pH of the following samples by using pH paper/universal indicator:(i) Dilute Hydrochloric Acid(ii) Dilute NaOH solution(iii) Dilute Ethanoic Acid solution(iv) Lemon juice(v) Water(vi) Dilute Hydrogen Carbonate solution Materials Required Six test tubes Test tube stand Glass rod Measuring cylinder (10 mL) Standard pH colour chart pH paper Glass rod Dropper Universal […]
Human Eye and Colourful World Quiz – 1 Test yourself what you have studied in this chapter with the help of this quiz created by the BrainIgniter experts and improve your study accordingly. Get the result instantly by clicking on submit button. Best wishes! [WATU 38]
Light Reflection and Refraction Quiz – 2 Test yourself what you have studied in this chapter with the help of this quiz created by the BrainIgniter experts and improve your study accordingly. Get the result instantly by clicking on submit button. Best wishes! [WATU 5]
Light Reflection and Refraction Quiz – 1 Test yourself what you have studied in this chapter with the help of this quiz created by the BrainIgniter experts and improve your study accordingly. Get the result instantly by clicking on submit button. Best wishes! [WATU 3]
Electric Motor Electric Motor:- An electric motor is a rotating device that converts electrical energy to mechanical energy. Principle:- It is based on the principle that when a current carrying conductor is placed in a magnetic field perpendicular to it, it experiences a force. Construction:- Consider a rectangular coil ABCD placed in a magnetic field […]
Electricity Important Questions : Solutions The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. What current will the heater draw if the potential difference is increased to 120 V.Sol: Here, V = 60 V and I = 4 A Using, […]
Aim To determine the equivalent resistance of two resistors when connected in parallel. Materials Required Theory When two or more resistors are connected together between two points then they are said to be connected in parallel. In parallel combination, The formula to calculate equivalent resistance in series is: 1/Rp = 1/R1 + 1/R2 + 1/R3 Circuit Diagrams Procedure […]
Aim To determine the equivalent resistance of two resistors when connected in series. Materials Required Two resistors A battery eliminator Ammeter Plug key Connecting wires A piece of sandpaper Voltmeter Rheostat Theory When two or more resistors are connected end to end to each other, then they are said to be connected in series. In […]
Our Environment Notes Environment Everything that surrounds us is known as environment. Biodegradable Substance Substances that are broken down by biological processes are said to be biodegradable.e.g.: cotton, jute etc. Non-biodegradable Substance Substances that are not broken down by biological processes are said to be non-biodegradable.e.g.: plastic, metals etc. ➢ Micro organisms releases enzymes which […]