CBSE ASKED ONE MARKS QUESTIONS | CHAPTER -1 CHEMICAL REACTIONS AND EQUATIONS | 2020-2021LECT 1.15

#CBSEASKEDONEMARKSQUESTIONS#ONEMARKSQUESTIONS#MOSTIMPORTANTONEMARKSQUESTIONS#CHAPTER1CHEMICALREACTIONSANDEQUATIONSONEMARKSQUESTIONS#PREVIOUSYEARQUESTIONSOFCHPATER1CHEMICALREACTIONSANDEQUATION 6th APRIL 2020 In this tutorial we are going to solve one marks questions asked by CBSE till 2020 of CHAPTER-1 CHEMICAL RACTIONS AND EQAUTIONS SCIENCE.We will deal with the following questions in the video:- Q1.Potato chips manufacturers fill the packet of chips with nitrogen gas .Why ?[CBSE 2011] Flushing bags of chips with nitogen cuts off oxygen and protects the food from rancidity. Q2.N2 + 3H2 → 2NH3 ,name the type of reaction . [CBSE 2011] Q3.If copper metal is heated over a flame it develops a coating .What is the colur and composition of coating ? [CBSE 2011] Q4.Write a balanced chemical equation to represent the following reaction: [CBSE 2011] Carbon monoxide reacts with hydrogen gas at 340 atm to from methyl alchol . Q5.Which one is a chemical change –fermentation of fruit juice or diluting fruit juice ? [CBSE 2011] Q6.Is burning of a candle wax a physical change or a chemical change ? [CBSE 2011] Q7.State one basic difference between a physical change and a chemcial change . [CBSE 2011] No new substance is formed in a physical change while a new substance is formed in a chemical change . Q8.Name and state the law which is kept in mind when we balance a chemical equation . [CBSE 2011] Q9.AgNO3 (aq) +NaCl (aq) → AgCl (s) ↓ + NaNO3 (aq) FeS +H2SO4 → FeSO4 + H2S ↑ Consider the above mentioned two chemical equations with two different kinds of arrows and along with products .What do these two different arrows indicate ? [CBSE 2011] Q10.Complete and balance the following quation: [CBSE 2010] Fe2O3 +Al → Q11.Define oxidation and reduction . [CBSE 2010], [CBSE 2011] Q12.Give an example of double displacement reaction (only reactionwith complete balanced equation ). [CBSE 2010], [CBSE 2011] Q13.Balance the following chemical equation : [CBSE 2015] NaOH + H2SO4 → Na2SO4 + H2O WATCH CLASS X SCIENCE LECTURE SERIES HERE 👇 /playlist/PLTxawOuYFHIoTfpY1F4JkcnxCspZccYPU JOIN CLASS X GROUP ON WHATS APP HERE 👇 https://chat.whatsapp.com/HgYJKeg83M5IhzbKbnKP3g JOIN CLASS X GROUP ON TELEGRAM BY HERE 👇 https://t.me/joinchat/JTdBtBP1bIChMm8MsXQSwQ FOLLOW US ON OUR INSTAGRAM PAGE 👇 https://www.instagram.com/gyaanikeeda915/?hl=en FOLLOW US ON OUR FACEBOOK PAGE👇 https://www.facebook.com/GYAANIKEEDA915 #ABKIBAARCBSE2020PAAR #FEELLIKEACBSETOPPER @GYAANIKEEDA (2020-2021)

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