MCQ Class 8 Science Chapter 11 Chemical Effects of Electric Current Advertisement MCQ’s For All Chapters – Science Class 8th 1. Which of the following is a bad conductor of electricity?Distilled waterSilver nitrateSulphuric acidCopper sulphateYour comments:Question 1 of 202. Which of the following does not conduct electricity?Sugar solutionVinegar solutionLemon juice solutionCaustic soda solutionYour comments:Question 2 of 203. An electric current can produceheating effectchemical effectmagnetic effectall of theseYour comments:Question 3 of 204. Pure or distilled water is apoor conductorgood conductorboth (a) and (b)none of theseYour comments:Question 4 of 205. Which of the following is a good conductor?BrickSteelPlasticCottonYour comments:Question 5 of 206. Polythene isa conductoran insulatorboth (a) and (b)none of theseYour comments:Question 6 of 207. Electroplating is based onheating effect of electricitychemical effect of electricityphysical effect of electricitymagnetic effect of electricityYour comments:Question 7 of 208. Copper is a good conductor an insulatorboth (a) and (b)none of theseYour comments:Question 8 of 209. Waste from an electroplating factory must be disposed offin the nearby riverin the nearby pondin the nearby cornfieldaccording to the disposal guidelines of Waste Management BodiesYour comments:Question 9 of 2010. An electrolyte isa metala liquid that conducts currenta non-metalnone of theseYour comments:Question 10 of 2011. Flow of electron is calledelectrolyteelectroplatingelectrodeselectric currentYour comments:Question 11 of 2012. Which is not a non-electrolyte?Ethyl alcoholSodium chlorideUreaSodium solutionYour comments:Question 12 of 2013. An electric lamp glows due toheating effectmagnetic effectchemical effectphysical effectYour comments:Question 13 of 2014. Electroplating preventscorrosionpassing of currentdissociationshiningYour comments:Question 14 of 2015. Which of the following is not used for electroplating metal articles?NickelSilverChromiumSodiumYour comments:Question 15 of 2016. Iron objects can be protected by electroplating them withchromiumnickelzincall of theseYour comments:Question 16 of 2017. In LEDs, the longer lead (wire) is always connected to the _______ terminalnegativeneutralpositiveAny terminalYour comments:Question 17 of 2018. Tap water is a good conductor of electricity while distilled water is not becauseTap water contain saltsDistilled water do not contain saltOnly (a) is correctBoth (a) & (b) is correctYour comments:Question 18 of 2019. When electrodes are immersed in water and electricity passed, the bubbles formed on the positive terminal is actually _______ gas.HydrogenCarbon dioxideOxygenBoth A & CYour comments:Question 19 of 2020. When electrodes are immersed in water and electricity passed, the bubbles formed on the negative terminal is actually _______ gas.HydrogenCarbon dioxideOxygenNitrogenYour comments:Question 20 of 20 Loading...
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