MnO₂ + x HCl → MnCl₂ + y H₂O + z Cl₂
In order to balance the above chemical equation, the values of x, y and z respectively are : a) 6, 2, 2 b) 4, 1, 2 c) 4, 2, 1 […]
In domestic electric circuits the wiring with 15 A current rating is for the electric devices which have
https://youtu.be/InsmjBcIrY0 This question is about which type of electrical devices are typically connected to wiring with a 15 amp current rating in domestic electric circuits. The answer is (a), higher […]
If four identical resistors, of resistance 8 ohm, are first connected in series so as to give an effective resistance Rs, and then connected in parallel so as to give an effective resistance Rp, then the ratio Rp/Rs is
https://www.youtube.com/watch?v=Z0XB7oLo8ww The question is about resistors connected in series and parallel. It asks for the ratio of the effective resistance when the resistors are connected in series (Rs) to the […]
The emission of brown fumes in the given experimental set-up is due to
https://youtu.be/YwyP-bDU6Tk Here is the Explanation: The correct option is (a) thermal decomposition of lead nitrate which produces brown fumes of nitrogen dioxide. When lead nitrate (Pb(NO₃)₂) is heated, it decomposes […]
In the experimental setup given below, it is observed that on passing the gas produced in the reaction in the solution X, the solution X first turns milky and then colourless.
https://youtu.be/V6Hg_xyNO_k The option that justifies the above stated observation is that ‘X’ is aqueous calcium hydroxide and (a) it turns milky due to carbon dioxide gas liberated in the reaction […]
