Doubtly
@Doubtly · Joined Feb 2021
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- Prepare a news report Sweepers daughter/son scores 96% in class XII Pune, 27 June: It was indeed a heart-warming sight to see Meena being felicitated and cheered during a function at her school, by students a... 1
- write your counterview on the topic Internet will soon repace books Today, there is a lot of talk about the internet replacing books. I beg to differ. This is not possible. The internet is certainly easily ac... 1
- "Reading Inspiration Day" in your school assembly: the subject given to you is "Importance of Reading". Use the following points: Respected Principal, teachers and my dear friends, Good morning. Today, October 15, is observed as Reading Inspiration Day to commemorate th... 1
- Write a letter to the Editor, The City Times, complaining about the frequent failure of electricity in your city. 207, malhar rajaji path , Dombivali 16^th oct, 2021 To The Editor Lokmat Thane Subject : complaining about the frequent failure of electrici... 2
- Write a letter to your friend minu/mohit making him/ her aware of the importance of sports in ones life 225, Veerchakra Colony. Kolhapur-416 002. 9 March, 2021. Dear Minu, Hil How are you? Now that the all-important Std. X exams are over, what... 1
- How to memorize CBSE Class 10 Maths formulas? Memorizing mathematical formulas can be challenging, but there are some strategies you can use to make the process easier. Here are some tip... 1
- What is a catalyst ? Write any one reaction which is brought about by use of catalyst ? A catalyst is a substance that changes (usually increases) the rate of a chemical reaction without itself undergoing any permanent chemical... 1
- What is meant by vinegar and gasohol? What are their uses ? Vinegar is a dilute (about 5–8%) solution of acetic acid (ethanoic acid) in water; gasohol is a mixture of petrol (gasoline) and ethanol use... 1
- Give names of three natural polymers. Write the place of their occurrance and names of monomers from which they are formed. Three natural polymers are starch, cellulose and proteins. Natural polymerWhere it occursMonomer StarchStored food in plants: grains (rice,... 1
- Give names of three functional groups containing three different hetero atoms. Write name and structural formula of one example each. Three functional groups with three different heteroatoms: halo (halogen), alcohol (oxygen) and amine (nitrogen). HeteroatomFunctional groupE... 1
- Give any four functional groups containing oxygen as the heteroatom in it. Write name and structural formula of one example each. Four functional groups with oxygen as the heteroatom: alcohol, aldehyde, ketone and carboxylic acid. Functional groupExampleStructural formu... 1
- Saturated hydrocarbons are classified into three types. Write these names giving one example each Saturated hydrocarbons are of three types: straight chain, branched chain and cyclic. Straight chain hydrocarbons: carbon atoms are joined o... 1
- What causes the existance of very large number of carbon compound ? Organic compounds mean carbon compounds. Carbon is unique element in the periodic table. It has 4 valence electrons. That means each individ... 1
- Write structural formulae for the following IUPAC names. Condensed structural formulae: IUPAC nameStructural formula a. pentan-2-one mathrmCH₃-CO-CH₂-CH₂-CH₃ b. 2-chlorobutane mathrmCH₃-CHCl-CH₂-CH... 1
- Identify the type of the following reaction of carbon compounds. a. CH₃-CH₂-CH₂-OH → CH₃ -CH₂ -COOH = Oxidation reaction(acidic KMnO₄) b. CH₃ -CH₂ -CH₃ → 3CO₂ + 4H₂O = Combusion reaction c. CH₃ -CH = CH -C... 1
- Write the IUPAC names of the following structural formulae a. CH₃-CH₂-CH₂-CH₃ Answer The number of items in the longest chain :4 Parent Alkane :Butane IUPAC Name :nButane b. CH₃-CHOH-CH₃ Answer The n... 1
- Oxidant Explain the following terms with example Oxidant: The substance which gives oxygen for oxidation is called an oxidising agent or oxidant. The substance which removes hydrogen is cal... 1
- Reduction Explain the following terms with example Reduction: The addition of hydrogen to a substance is called reduction. The removal of oxygen from a substance is called reduction. For exam... 1