 the exam thing, everything they have divided into two parts, term one and term two, term one is going to happen in November and December and in this exam the questions will be MCQ means multiple choice questions, where there will be one question and there will be four options, you have to select the correct option what will happen in this, MCQs, some MCQs would be based on your topic, some MCQs would be based on case studies, case based MCQ, meaning what happens in this, as soon as they give a paragraph, you have to read the paragraph, according to that they will give you 4-5 questions, maybe you have to answer four questions, five questions, something like that, they will also be MCQs after that, there is a new pattern, it is very interesting, it is an assertion and reason type question, in MCQ this third pattern is an assertion and reason sort of question, so what will happen in this, there will be two sentences, one will be assertion and one will be reason according to that, you have to properly read both the sentences and choose the correct option, maybe sometimes you will feel that assertion and reason are both correct, correct are not correct, so according to that you have to answer them so all of these type of questions we are going to discuss in this series, what we are going to do here, we will discuss all types of questions, and in this first term, your maximum let's say 50% of syllabus is covered, according to CBCA what they have told that 50% syllabus is going to come in your first term, so we are going to talk about the same syllabus in this series so the good part is that here we will practice a lot of questions, like you take MCQs, case based, assertion and reason type of questions we will practice here, so if you do 100% of your day and follow this series, then I think your preparation for a good level is going to be for the board exam another thing is what, term 1 exam duration will be 90 minutes, and I guess maximum marks are 50, so let's discuss term 1 exam topics like in this video I am going to talk about chemistry, chemistry's first topic is chemical reaction and equation in term 1 there are 3 topics, chemical reaction, second is acid and bases and third is metals and non-metals, so we are going to discuss these questions okay now let's begin with the first topic hello friends once again, so as we have talked, we are going to discuss all the chapters of MCQs, so let's start with the first chapter, that is chemical reactions and equations okay, so here we will discuss almost 100 questions okay, so see what is our first question some crystals of copper sulphate were dissolved in water, the colour of solution obtained would be crystals of copper sulphate so first of all the crystal of copper sulphate is of blue colour okay let me tell you the crystal of copper sulphate is of blue colour so when you dissolve the crystal of blue colour in water, then which colour will it be, blue colour will it be, right so answer should be what, C, blue okay there is a name you must have heard, blue vitriol blue vitriol copper sulphate crystals they are also known as blue vitriol its formula is CUSO4.5H2O okay, these are the hydrated crystals, in this 5 water of crystallization molecules are attached okay, so what happened, blue vitriol, copper sulphate, right, hydrated crystal where we have 5 water of crystallization attached, right okay, let me give you a similar example, green vitriol okay suppose we never have blue vitriol in the exam, what will we do if we have green vitriol see we have green vitriol green vitriol okay, green vitriol who is it called ferrous sulphate FeSO4.7H2O what is the difference, one is ferrous sulphate, the other is iron okay, along with that 7 water of crystallization molecules are attached okay, how many are there, along with that we have water molecules attached ferrous sulphate crystal man okay, what is it called, green vitriol got it, right okay, now let's see the next question hmm, so the second question is when dilute HCl is added to zinc pieces okay, take an inner test tube fine, let's take zinc pieces in one test tube first we will add dilute HCl in it okay, so what should happen see first thing, take it in your mind HCl or zinc, that means there is a reaction here between acid and metal acid and metal, okay so first option is what no change take place no, nothing like this will happen acid and metal will react okay, the color of solution becomes yellow hmm, pungent smelling gas gets liberated no, no, no, no okay, a small bubble of hydrogen gas appears on the surface of zinc okay, so this is our correct answer why it will happen, let's see the reaction okay, what is the reaction suppose we took zinc in a test tube metal okay, what we took with metal, acid okay, now what happened whenever metal reacts with acid okay, so it forms salt and salt and hydrogen gas okay, so what is going to happen here zinc will react with chlorine basically what it is doing, it is replacing hydrogen so zinc will make ZCl2 this is our salt and when hydrogen is replaced what will it do for hydrogen nothing, right what it will do, hydrogen another atom of hydrogen it will form a gas molecule okay, so metal plus acid gives salt and hydrogen now, another type of question which I have seen somewhere that when you react with acid and metal then sometime metal floats on the surface metal floats on the surface of acid why, what is the reason so reason is what because hydrogen bubble gets stick to the metal surface so because of gas bubbles metal starts floating on the surface okay, got it let's see the third question okay so our third question here is pbs react with ozone okay and form pbs of ozone okay, means it has told both the reactant and product okay, so as per the balance equation molecule of ozone required for every one molecule of pbs are super easy question, what do you have to do you just have to balance the equation see what you have to do first you have to understand that ozone is a powerful oxidizing agent ozone is what, powerful oxidizing agent okay oxidizing agent okay, what it will do it will react with pbs and convert pbs to pbs of 4 okay, let's sulphate and remain it will release some oxygen as well okay, what it will do, it will release some oxygen right, now what will happen if we balance it when you balance this equation okay, you will get that ozone 4 molecule of ozone is required and 4 molecule of oxygen will be produced okay, so according to balance equation what should be the answer right, simple, now it is clear how many molecules of ozone is required 4, right, molecule of ozone is required for every one molecule of pbs is what 4, okay here see what is happening because ozone is a good oxidizing agent powerful oxidizing agent so it is oxidizing of late sulphide right, that means pbs is getting oxidized okay, got it right, okay let's move on to the fourth question now see how easy question is this chemically rust is what what is rust okay, so hydrated ferrous oxide hydrated ferric oxide only ferric oxide, none of this first let's understand what is ferrous oxide what is ferric oxide where will we use ferrous and where will we use ferric got it, okay, so ferrous okay, ferrous you know right FE has two type of balance mostly stable valance is what is FE 2 type and FE 3 there are two types of oxidation number of iron right, 2 plus and 3 plus so if you have a compound where iron is showing 2 plus valance iron is showing 2 plus valance where does the compound start from, ferrous okay, what is involved in that is ferrous and there is a compound where the valance of iron is 3 plus and the valance of iron is 3 plus and the oxidation number of iron is 3 plus what is the name of that compound where does ferric start ferric okay, okay now tell me what is the formula of rust see what is the formula of rust think about it iron plus air how does it react to air oxygen and water okay, so what will it make FE 2 O 3 FE 2 O 3 dot X H2O okay, dot X H2O so X H2O's presence is so clear that it is a hydrated crystal okay, means it is a hydrated molecule right now FE 2 O 3 see what is FE 2 O 3 iron and oxygen, how much is the valance of oxygen 2, how much is the valance of iron this formula according 3, see even then in cross multiplication formula is made FE 2 O 3 got it, right so here is FE 2 O 3 right and how much is the valance of iron 3 here so what should be done hydrated ferric oxide correct answer should be hydrated ferric oxide got it, right okay, now we will see the next question okay, tell me one more thing if I say that you have formula what formula do you have FE O so what should be the name of this compound say what should be the name of this compound pay attention again FE O formula from where it came FE and oxygen of course oxygen's valance is 2 iron's valance is how much is the valance of iron 2, why because when these two are combined so they will make a formula FE 2 O 2, 2 to cancel so what is the resultant formula FE O, because here the valance of iron is 2 so what should be the name ferrous oxide so what will be the name of FE O ferrous oxide, why will it be because iron's oxidation number is 2 plus right and what will be the name of FE 2 O 3 so what will be the name ferrous oxide, why will it be because iron's valance is 3 plus iron's oxidation number is 3 plus got it, sure okay, let's see the next question let's see the next question so easy question look which of the following reaction is not correct now this reaction is not correct I have to tell you that this is the reactivity series so first we should remember the reactivity series now you will say we have to remember the reactivity series so it is difficult how can we do it so here we are going to do some short tricks to memorize the reactivity series okay, how will we do it first look at the question which of the following reaction is not correct Zn plus CuSO4 gives ZnSO4 plus Cu okay copper react zinc reacts with copper sulphate then copper sulphate is replaced zinc sulphate is made so this reaction is absolutely correct this is not our answer second silver reacts with copper nitrates and what is it doing copper nitrate is replaced with silver nitrate so silver you all know very well silver is sort of inert metal in the category of inert metal silver, gold, platinum so silver cannot replace copper so this reaction is not possible correct how will we do it there is no reactivity of it so B should be our answer still we can see the COD option what is iron react with copper sulphate so it gives copper iron sulphate and copper yes iron copper is replaced because iron is more reactive so copper is replaced so you see this is an experiment I think you must have given it in your textbook what kind of experiment is it copper sulphate has a blue color solution let's say I have a blue color solution I have put an iron nail in it after some time after few hours after few hours after few hours after few hours after few hours after few hours after some time it will be clear yes iron sulphate that means iron can replace copper from its solution next we have magnesium reacts स्बट मजी न रे पा्टद के रवीग, Citra Lakad preconseacağım knot ka mali aloo. सyora féke paka'ta hai. स्बट न रे और इस के पखाता है। So tentar kashinaut ka mali aalu zara feke paka'ta hai. स्वेह क्या वहात chatter. अद योग नाद बताओ क्योगा नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद नाद � लिए प्काता है पिक में या लिख होगे फीजे अफ्से या रेण होगा प्रिरिःवारीट्बल में, जो हमारे मैंड्वी याद बी होग. अई आें आन, आिय आन, पकाता है पकाता है में क्या बता उगे, पकाता है प्कवबबऀबबबबबबब. जी प्लंबम लिद तेखे है रीरत्रोगजन तेखे अभी आप यहा जीस सेरीस भी जीज कप्लेत नहीं होती है तेखे बात में आप रही प्यास में After the Hydrogen, okay From After Hydrogen, you guys have to continue After Hydrogene, what will you get? कोपर, Hg , Silver and Gold अपु इतिना बातो होगग में की ही यहाना पहनबार हमको पड़ाजल क्या है अपु आमको वातो होगगगगगगगगगगर, अपु किसेने माली कि बुराई करी है. काँसीनात का माली अलुफी के पणाते है. माली के बुराई कर दि MI LADHiya kasi nath ka maali alu fi ke pa kata hai. कुन है आगे आखो कुन है आगे आखो आखो कुन है कोपर आगे कुन है मरकुरी आगे मैंस आएजी कोपर के लिए you have गोल के लिए you have symbol आखो आखो आखो अपर मेंतल्स एक लिए you go down अखो आखो आखो आखो आगे एक लिए अगो आखो आखो आखो कुन है आगे बोर तो नहीं होगना. अभी तो हम लोगको और फाँट प्रश्यन्स करने हैं आजके इस भीटीो में कबाद थीखे. आजको जो भी इसी हो वोस में लान कर सकता हैं. मेरे लिए दोनो इसी हैं. तीखे हैं। सो आप लान्ट में बोड़्. क्या है इन इंगलिष् प्लीज स्तोप खालिग मी अख्य। जिप्रा. देखो प्लीज मीन स्वोड प्टाश्यम, स्तोप, सोडियम, एन आग्ट खालिख, क्या खालिग काँश्यम, मी मागनीश्यम, आग्ट अल्युमेनियम, कुड, कार्बन. कुड, कार्बन, जिप्रा, सिंख.�τε सुले । तोब लस्टने कुईन्रूर । अगोग replaces .... पड़ि। औगे तो उप की आप समव लग, आप भब बुच छीवत, रहा Ama पर कुए kork्ने की है सात्ता बाँका लग! � brake । ... ... ... करचाब क्याा? करपर is more reactive than what? करपर is more reactive than silver. it is more reactive than bold. बोल! आवी आप यहाप टेख़ आप धीए. करपर is less reactive than zinc. it canít be कोपर is not more reactive than iron. iron in fact is more reactive. iron's reactivity is more than copper. कोपर is more reactive than silver. it can displace or it can replace silver from its solution. कोपर कोपर कोपर कोपर कोपर कोपर is more reactive than silver. �总ईगा नहीं तु जो जोगें भी जोगेंगेंगेंगे खीजां! किसे हो管बंज छात जोगेंगेंगे गर्ज्दूथ की कपहने गब यहकरेय भी ब्गा, thanhjiya know馍सी धानौट्फेशें मेरो्नेगे इत फ्रैमज नफिरम्र सब शर Leonardo Mathias said once theludhlu��e is stronger than silver. अनो wo into the formula when we talking about the silver nitrate मत्री टया असा दिएं के कि कि इया आमारे भास कहना nonetheless असा क्कब कब भूल मैसा क्ती breakfast असा देहाम सटेय। l थी country यह सभत भॉल्गाEND उती थी. ख़री ड़िकंगिण लीज़ा दे देखाँ. यह आप लोगड़ा लेचटी नुदे थे. तो वह तो वेरी चाँडाट बागी. तो वो पिलवागिया लेचटी लोग देखा थे. वह दो थे याताखंगर करने थे. सिलबर निर्टेट ती बात कोती होत Chi tu silban naitre hati hoto सिलबरका वलन्सी के या। पाडे तो इलेक्तो लेटेइक सेल की याद्तर हैं تو 11 11 11 तो पहले तो एलेक्तोलेटिक सेल की अदर बात्तर हैं, तो एलेक्तोलेटिक सेल दाप में स्वोर एक हमारे पस आसा एक वेसल होता है, नहीं आच्चल दे वेसल दे बाट्री का, मेंभी युगन से ग्लास और भब वोट्रे से अभी कर, नहीं नहीं ऑो लूग ख्या और नहीं गब भोबब वोट्रे से लेक्तोलोगा लेक्तोलहिट क्या जोगा कोई ओगा, अआ, और भाटरी सीब रइत गाजा ल के लिँगा कोगा, तो वी कि बाटरी लिग जोगा लिँगा रहे है, इसे लिटचार कम आप़के लिट जावार्ड्त्ती। तो यहा है यहा वो यहना लिट लिटिट लिटचार अदन रो सहो रख पवाए और रब आनर वो वो लिट गेशार था देखार अदन वो वी दागा और तो तो तो जौम of Wendy ये खापतिब क� बुब रहूब भी उडरान killed लेकि आपकन हमैस्शो � .. यहां पर हमा vols option Lakam यसगंग हो लोग्सिद अगत्फोई. यसलिये क्या है कोम्मिनेशच़ यहाँ नहींग हम पर. औके. नहींख केशिन, अन्द्ये लेज्च्चन यहाँ ड़़्बान और आप यहाँ और अव नगाँ पर भुसत् है. तब वहाँ लेज्चिजन कना पर अनगे वोग है. करबन is gaining oxygen. तो क्या और है? Oxidation. करबन act as an oxidizing agent. करबन act as an oxidizing agent. बहुत लेड अख्सेट का रडक्चन में हो रहा है दिन करबन कैसे as an oxidizing agent work करेगा? नहीं जाहएं पढ़़ा है और आख्सेट से पड़ाए गरो तिके बहुत