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Case study project on Apple  production from himachal pradesh

 

Posted by Mansi Sharma (Jan 19, 2017) (Question ID: 1477)

What does a chart sheet contain ? When is such a document prepared and what is done with it

 

Posted by Anu Jain (Jan 19, 2017) (Question ID: 1476)

My doubt is to the institution/dignitaries of myCBSEguide. I am a student studying in class 9. I am too much worried about the consumption of time I take for attending 1,2,3,4, and 5 marks questions . Usually I takes 1/2 sheets for attending 3,4 and 5 marks questions. My teachers advices me I am writing too much than the limit. But,unfortunately I could't control my writing. By doing so I miss so many questions which I know. The board exams are nearer to me. So, respected dignitaries please send me how to manage time and how much  to write in my exams.

Posted by Vaishak Kurup (Jan 19, 2017) (Question ID: 1475)

  • Answers:
  • Thankyou for asking this question as this is one of the main problems faced by students during examinations. As the time progresses towards exams, we get caught by the fear as how we will solve the question paper in prescribed time limit.

    For this, firstly solve sample papers and stick to the word limit. You will only get marks for writing the right answer not a long answer. Do not repeat the points in your answer or write the extra stuff which is not even asked. It won't fetch you any extra marks but would definitely waste your time. Practice sample papers and after that look up the solutions and compare that have you written the desired pointsonly. Eliminate the unwanted part.

    By this, you will feel confident and will be able to score well in your examinations. All the best!

    Answered by Shweta Gulati (Jan 19, 2017)
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Reducing agent undergoes 

What And why

Posted by Keerthi s (Jan 19, 2017) (Question ID: 1474)

  • Answers:
  • A substance which undergoes oxidation but reduces others is known as reducing agent or reductant. In other words a reducing agent is an electron loser.

    so by this we can say that reducing agent undergoes oxidation.

    it happens when an atom or compound loses one or more electrons. Some elements lose electrons more easily than others. These elements are said to be easily oxidized. Generally speaking, metals including sodium, magnesium, and iron are easily oxidized.

    Answered by Naveen Sharma (Jan 19, 2017)
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Why tertiary and secondary amine do not react to carbylamine test 

Posted by Keerthi s (Jan 19, 2017) (Question ID: 1473)

  • Answers:
  • Carbylamine test leads to formation of alkyl cyanide and this is characteristic reaction for primary amines.
    Secondary and tertiary amines do not allow the formation of cyanide due to insufficient bonds for formation of triple bonds between carbon and nitrogen.
    So this reaction is not given by secondary and tertiary amines.

    Answered by Naveen Sharma (Jan 19, 2017)
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What is peptisation

 

Posted by Kartik Diwale (Jan 19, 2017) (Question ID: 1472)

  • Answers:
  • Peptisation is the process which is the primary cause for the formation of colloidal particles in dispersion medium. It requires an electrolyte known as peptizing agent for the completion of the process. It plays a vital role for understanding precipitation reactions that occur in aqueous solution. It has a number of uses:

    1. It can be used in nano particle synthesis.
    2. It can be used to split large grouping into smaller particles.
    3. It is used for synthesizing Titania.
    4. It helps in filtrating colloidal solution.
    Answered by Naveen Sharma (Jan 19, 2017)
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  • Ans. Peptization is the process responsible for the formation of stable dispersion of colloidal particles in dispersion medium. In other words it may be defined as a process of converting a precipitate into colloidal sol by shaking it with dispersion medium in the presence of small amount of electrolyte.

    Answered by Payal Singh (Jan 19, 2017)
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Who were conservatives?

Posted by Saif Sam (Jan 19, 2017) (Question ID: 1471)

2,3,4,4,2x+1,5,5,6,7 find x and mean by imperical formula

Posted by Daksh Bhagat (Jan 19, 2017) (Question ID: 1470)

  • Incomplete question

    Posted by Rashmi Bajpayee (Jan 19, 2017)
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The curved surface area of cone is 550cm²and the height of cone is 24cm. Find volume.

Posted by nimisha singhal (Jan 19, 2017) (Question ID: 1469)

  • Answers:
  • Let Radius of Cone is r and slant height is l.

    height of Cone (h) = 24 cm

    CSA of cone = 550 cm2

    We know, 

    l = r2+ h2

    => l = r2+ 576           ............(1)

    Also,

    CSA = π×r×l

    => 550 = 227×r × r2 +576

    Squaring both side,

    => 302500 = 484 r2 (r2 + 576)49

    => 30625 = r4 + 576r2

    =>  r4 + 576r2 - 30625 = 0

    Put r2 = t

    =>  t2 + 576t - 30625 = 0

    =>  t2 + 625t - 49t - 30625 = 0

    =>  t(t + 625) -49(t+ 625) = 0

    =>  (t + 625) (t-49) = 0

    => t + 625  = 0 or t-49 = 0

    => t = - 625 0r t = 49 

    => r = -625 is not possible so r2 = 49 

    => r = 7 

    put in (1), we get 

    l = 49+576

    => l = 625

    => l = 25

    =>Volume of Cone = 13πr2h

    => Volume of Cone = 1×22×49×243×7

    => Volume = 1232cm3

     

    Answered by Naveen Sharma (Jan 19, 2017)
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Effect of demonetization one economy and ppc? (6 marks)

 

Posted by mansi mittal (Jan 19, 2017) (Question ID: 1468)

  • Answers:
  • Ans. Demonetization as a cleaning exercise may produce several good things in the economy. At the same time, it creates unavoidable income and welfare losses to the poor sections of the society who gets income based on their daily work and those who doesn’t have the digital transaction culture.Following are the main impacts.

    1. Demonetization is not a big disaster like global banking sector crisis of 2007; but at the same time, it will act as a liquidity shock that disturbs economic activities
    2. Liquidity crunch (short term effect): liquidity shock means people are not able to get sufficient volume of popular denomination especially Rs 500.  This currency unit is the favourable denomination in daily life. It constituted to nearly 49% of the previous currency supply in terms of value. Higher the time required to resupply Rs 500 notes, higher will be the duration of the liquidity crunch. 
    3. Welfare loss for the currency using population: Most active segments of the population who constitute the ‘base of the pyramid’ uses currency to meet their transactions. The daily wage earners, other labourers, small traders etc. who reside out of the formal economy uses cash frequently. These sections will lose income in the absence of liquid cash. Cash stringency will compel firms to reduce labour cost and thus reduces income to the poor working class.
    4. Consumption will be hit: When liquidity shortage strikes, it is consumption that is going to be adversely affected first.
    5. Loss of Growth momentum- India risks its position of being the fastest growing largest economy: reduced consumption, income, investment etc. may reduce India’s GDP growth as the liquidity impact itself may last three -four months.
    6. Impact on bank deposits and interest rate: Deposit in the short term may rise, but in the long term, its effect will come down. The savings with the banks are actually liquid cash people stored. It is difficult to assume that such ready cash once stored in their hands will be put into savings for a long term. They saved this money into banks just to convert the old notes into new notes. 
    7. Impact on black money: Only a small portion of black money is actually stored in the form of cash. Usually, black income is kept in the form of physical assets like gold, land, buildings etc. Hence the amount of black money countered by demonetization depend upon the amount of black money held in the form of cash and it will be smaller than expected. 
    8. Impact on counterfeit currency: the real impact will be on counterfeit/fake currency as its circulation will be checked after this exercise.
    Answered by Naveen Sharma (Jan 19, 2017)
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What is HVZ reaction?

Posted by jyotika Singh (Jan 19, 2017) (Question ID: 1467)

  • Answers:
  • Ans.Treatment with bromine and a catalytic amount of phosphorus leads to the selective α-bromination of carboxylic acids.

    <h2>Mechanism of the Hell-Volhard-Zelinsky Reaction</h2>

    Phosphorus reacts with bromine to give phosphorus tribromide, and in the first step this converts the carboxylic acid into an acyl bromide.

    An acyl bromide can readily exist in the enol form, and this tautomer is rapidly brominated at the α-carbon. The monobrominated compound is much less nucleophilic, so the reaction stops at this stage. This acyl intermediate compound can undergo bromide exchange with unreacted carboxylic acid via the anhydride, which allows the catalytic cycle to continue until the conversion is complete.

     

    Answered by Payal Singh (Jan 19, 2017)
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  • The HVS (Hell-Volhard-Zelinsky) reaction is an organic reaction used to convert a carboxylic acid with an α-hydrogen and a halogen, to an α-halo carboxylic acid, using a phosphorous catalyst and water.

    The mechanism begins with the reaction of the carbonyl oxygen with phosphorous trihalide to form a P–O bond and release a halide anion. The halide then attacks the carbonyl to form an intermediate which rearranges to release an acyl chloride, an acid molecule, and a phosphine oxide.

    The acyl chloride then tautomerizes to the enol form which subsequently attacks the halogen molecule to form an α-halo acyl halide. Water hydrolysis yields the final α-halo carboxylic acid product.

     

     

    Answered by Naveen Sharma (Jan 19, 2017)
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What is linkage and recombination?

Posted by jyotika Singh (Jan 19, 2017) (Question ID: 1466)

  • Answers:
  • Genetic linkage is the coupling of two genes' patterns of inheritance because they are located on the same chromosome.

    Recombination is any of several processes by which genetic material ofdifferent origins becomes combined. It most commonly occursbetween two sets of parental chromosomes during production of germcells

    Answered by Naveen Sharma (Jan 19, 2017)
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  • Ans.

    Linkage is the tendency of alleles that are close together on a Chromosome to be inherited together during the meiosis phase of Sexual reproduction. Genes whose loci are nearer to each other are less likely to be separated onto different chromatids during Chromosomal crossover, and are therefore said to be genetically linked. In other words, the nearer two genes are on a chromosome, the lower is the chance of a swap occurring between them, and the more likely they are to be inherited together.

    Recombination is the formation of new combinations of genes, either naturally, by crossing over or independent assortment, or in the laboratory by direct manipulation of genetic material.

     

    Answered by Payal Singh (Jan 19, 2017)
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wha will be the effect of gst bill on PPC?

Posted by Muskaan Jain (Jan 19, 2017) (Question ID: 1465)

  • Answers:
  • The Goods And Services Tax (GST) will Effect the Ppc In both Long Run & Short Run . It is good for the long run as it will increase the production potential , gdp of country will also rise and ppc will shift rightward . In short run It will effect the ppc and it will shift leftward as the indirect tax’s will be removed and the supplier will decrease production

    Answered by Naveen Sharma (Jan 19, 2017)
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what is menarch ?

Posted by Anmol Bhatia (Jan 19, 2017) (Question ID: 1464)

  • Answers:
  • Ans. Menarch is the time in a girl's life when menstruation first begins. During the menarche period, menstruation may be irregular and unpredictable. Also known as female puberty.

    Answered by Naveen Sharma (Jan 19, 2017)
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Why LiAlH4 is not reduce keton and NaBH4 is used

Posted by jyotika Singh (Jan 19, 2017) (Question ID: 1463)

  • Answers:
  • Because it is stable compared to LiAlH4, it can be used in aqueous solutions and measured in open air where as LiAlH4 will react violently to moisture and water.

    Sodium  borohydride  is  a  much  less hazardous  reagent  than  lithium aluminum  hydride. The  greater selectivity and  safety  of NaBH4 make  it  the preferred  reagent  in applications with Ketones.

     

    Answered by Naveen Sharma (Jan 19, 2017)
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What is disease and define it's types 

Posted by Simranvir Sondhi (Jan 19, 2017) (Question ID: 1462)

  • Answers:
  • In Simple words disease is as name word itself suggests without ease.

    Disease is an abnormal condition of a part, organ, or system of an organism resulting from various causes, such as infection, inflammation, environmental factors, or genetic defect, and characterized by an identifiable group of signs, symptoms, or both.

    <font face="Arial">Types of Diseases</font>

    <font face="Arial">•</font>  <font face="Arial">Acute diseases</font>

    <font face="Arial">-</font>  <font face="Arial">The symptoms appear suddenly.</font>

    <font face="Arial">-</font>  <font face="Arial">These diseases are short term ie the symptoms last for short period of time.</font>

    <font face="Arial">-</font>  <font face="Arial">Eg. Influenza (Flu) , Common cold.</font>

    <font face="Arial">• Chronic diseases</font>

    <font face="Arial">-</font>  <font face="Arial">These diseases long term diseases.</font>

    <font face="Arial">-</font>  <font face="Arial">Their symptoms develop gradually and are long lasting.</font>

    <font face="Arial">-</font>  <font face="Arial">Eg. TB, Cancer etc</font>

    <font face="Arial">• Congenital diseases</font>

    <font face="Arial">-</font>  <font face="Arial">These are inborn diseases i.e. present from birth.</font>

    <font face="Arial">-</font>  <font face="Arial">Most of the diseases are permanent and generally not easily curable.</font>

    <font face="Arial">-</font>  <font face="Arial">They could be due to genetic abnormality or metabolic disorder.</font>

    <font face="Arial">-</font>  <font face="Arial">Eg. Down syndrome, Hemophilia, colour blindness, Sickle cell anaemia etc</font>

    <font face="Arial">• Acquired diseases</font>

    <font face="Arial">-</font>  <font face="Arial">The diseases which a person gets in his or her life time (i.e. after birth) are called acquired diseases.</font>

    <font face="Arial">-</font>  <font face="Arial">Acquired diseases are classified in to two categories</font>

    <font face="Arial">1)</font>  <font face="Arial">Communicable diseases (Infectious diseases)</font>

    <font face="Arial">2)</font>  <font face="Arial">Non-communicable diseases (Non-infectious diseases)</font>

    <font face="Arial">1) Communicable Diseases</font>

    <font face="Arial">•</font>  <font face="Arial">Communicable diseases are caused by pathogens such as virus, bacteria, protozoan, worms or fungi.</font>

    <font face="Arial">•</font>  <font face="Arial">The organism causing the disease may be transmitted from an infected person to another by means of air, water, food, physical contact or insects (vectors).</font>

    <font face="Arial">•</font>  <font face="Arial">Communicable diseases can be further classified on the basis of the causative agents like Bacterial diseases, Viral diseases, Helminth diseases, Fungal diseases etc.</font>

    <font face="Arial">2) Non-Communicable Diseases</font>

    <font face="Arial">•</font>  <font face="Arial">These are non infectious diseases ie do not spread from an infected person to other healthy person</font>

    <font face="Arial">•</font>  <font face="Arial">These diseases include deficiency diseases, degenerative diseases, cancer etc.</font>

    Answered by Naveen Sharma (Jan 19, 2017)
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If you multiply (x-a) (x-b)....... (x-y) (x-z) what is the answer?

Posted by Kartikeya Sisodia (Jan 18, 2017) (Question ID: 1460)

  • Answers:
  • Solution : It ll be equal to  Zero (0).

    because x-x = 0

    Answered by Naveen Sharma (Jan 19, 2017)
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Explain penalty of plagiarism 

Posted by isha barak (Jan 18, 2017) (Question ID: 1459)

  • Answers:
  •  

    Plagiarism allegations can cause a student to be suspended or expelled. Their academic record can reflect the ethics offense, possibly causing the student to be barred from entering college from high school or another college. Schools, colleges, and universities take plagiarism very seriously. Most educational institutions have academic integrity committees who police students. Many schools suspend students for their first violation. Students are usually expelled for further offences.

    Answered by Naveen Sharma (Jan 19, 2017)
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What is globalisation? 

Posted by Anirudh S Kumar (Jan 18, 2017) (Question ID: 1458)

  • Answers:
  • Globalization is the free movement of goods, services and people across the world in a seamless and integrated manner.

    Globalization can be thought of to be the result of the opening up of the global economy and the concomitant increase in trade between nations

    . In other words, when countries that were hitherto closed to trade and foreign investment open up their economies and go global, the result is an increasing interconnectedness and integration of the economies of the world.

    Answered by Naveen Sharma (Jan 19, 2017)
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  • Globalisation is a process of interaction and integration among the people,companies and government of different nations across the globe.

    Answered by shruti dadhwal (Jan 18, 2017)
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What is the differential equation of all non horizontal lines in a plane?

Posted by shashank singhal (Jan 18, 2017) (Question ID: 1457)

  • Answers:
  • Solution.

    The general equation of all non-horizontal lines in a plane is ax + by = c, where a ≠0

    Differentiate w.r.t. y, We Get

    adx/dy + b =0

    again differentiate w.r.t. y

    ad2x/dy2 =0

    => d2x/dy2= 0

    this is Required differential equation.

    Answered by Naveen Sharma (Jan 19, 2017)
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What is the full form of NLF

Posted by Shagun Vishwakarma (Jan 18, 2017) (Question ID: 1455)

  • Answers:
  • NLF stands for National Liberation Front

     

    Answered by shruti dadhwal (Jan 18, 2017)
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  • NLF stands for rNational Liberation Front.

    Answered by Naveen Sharma (Jan 18, 2017)
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Design a training programme for improvement of components of motor fitness.

Posted by Mansi Mishra (Jan 18, 2017) (Question ID: 1454)

 the sum of intiger and their reciprocal is 145/12. Find the intiger ?

Posted by Pankaj Asery (Jan 18, 2017) (Question ID: 1452)

  • Answers:
  • Solution:

    Let the integer = x

    Then reciprocal = 1/x

    According to Question

    x + 1/x = 145/12

    => (x2+1)/x = 145/12

    => 12x2 + 12 = 145x

    => 12x- 145x + 12 = 0

    => 12x2- 144x - x + 12 = 0

    => 12x(x - 12) - 1(x - 12) = 0

    => (x - 12)(12x - 1) = 0

    => x = 12 and x = 1/12

    as X is integer x can't be 1/12

    Therefore the required integer is 12

    Answered by Naveen Sharma (Jan 19, 2017)
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  • Let the integer be x.

    x + 1/x = 145/12

    12x2 - 145x + 12 = 0

    12x2 - 144x - x + 12 = 0

    12x(x - 12) - 1(x - 12) = 0

    (x - 12)(12x - 1) = 0

    x = 12 and x = 1/12

    Therefore the required integer is 12.

    Answered by Rashmi Bajpayee (Jan 18, 2017)
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A does 20% less work than B. If A can finish a piece of work in 7 1/2 h then B can finish it in

Posted by Umang Mittal (Jan 18, 2017) (Question ID: 1451)

  • Answers:
  • Ans. Let Time taken by B = x hours

    then work done by B In 1 Hour = 1/x

    as A does 20% less,

    So work done By A in 1 Hour =(1/x) -(20% *1/x)

    => 1/x - 1/5x => 4/5x

    Then time taken by A =  5x/4

    according to Question, 5x/4 = 15/2

    x = 6

    So B can finish in 6 hours.

     

    Answered by Naveen Sharma (Jan 19, 2017)
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  • According to question,

    B can finish in 15/2 × 100 / (100 + 20)

    = 25/4 = 6 1/4 h

     

    Answered by Rashmi Bajpayee (Jan 18, 2017)
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Why the jute industries are located near hugli river basin

Posted by Shagun Vishwakarma (Jan 18, 2017) (Question ID: 1450)

  • Answers:
  • The reasons for this concentration of jute mills in Hugli River basin are as under:

    1. West Bengal is the store house of jute. It produces the highest number of bales of jute fibre.

    2. This industry requires a lot of water which is easily available from the Hugli River.

    3. Iron and coal which are required for the installation and running of jute factories are also available from the nearby mines of Raniganj.

    4. Cheap Labour is easily available because of incoming labour from the adjoining provinces of Bihar and Orissa.

    5. If some more raw material of jute is required it can easily be imported from Bangladesh.

    6. Last but not the least, Calcutta is a good harbour which can easily export the jute manufactures to other countries of the world through its great network of ships.

    Answered by Naveen Sharma (Jan 18, 2017)
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A divergent lens has a focal length of 20cm.at what distance should an object of height 4cm from the optical centre of the lens be placed so that its image is formed 10cm away from the lens.find the size of the image also

Posted by BAIJU JOSEPH (Jan 18, 2017) (Question ID: 1449)

  • Answers:
  • Ans. Distance between the object and the lens (u )= -10cm
    Focal length (f) = 20 cm
    Distance between the image and the lens v = ?

    Using Lens Formula 

    1f = 1v-1u

    => 120 = 1v - 1-10

    => 1v = 120 - 110

    => 1v = 1-220

    => 1v = -120

    => v = -20 cm

    The image is formed on the same side as the object and since v is negative the image is erect and virtual and is formed at a distance 20 cm in front of the lens.

    We know that

    m = h1h0 = vu

    height of the object ho = 4 cm

    => h1 = v×h0u

    => h1 = -20×4-10

    => h1 = 8

    height of image = 8 cm

    Answered by Naveen Sharma (Jan 18, 2017)
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horizontal symmytry

 

Posted by Utpala Venkat Raju (Jan 18, 2017) (Question ID: 1448)

  • Answers:
  • <pre> Ans. If A word, Letter, fiqure is divided by a straight line. Both the parts are equal in all respects. When the pictures or figures are folded along the straight lines, one part will fit or cover the other part exactly. </pre> <pre> if you draw a horizontal line ______________ across the middle of an object with horizontal symmetry, the top will be a mirror image of the bottom. Examples of capital letters that have horizontal symmetry are: B C D E H I K O X</pre>
    Answered by Naveen Sharma (Jan 18, 2017)
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The probability of guessing the correct answer to a certain question is x/2 (x upon 2). If the probability of not guessing the correct answer to the question is 2/3 ( 2 upon 3) , then find x.

Posted by Arish Faraz (Jan 18, 2017) (Question ID: 1447)

  • Answers:
  • Ans. Let A denote the probability of guessing correct answer and B denote the probability of not guessing correct answer.

    Then, pA = x2 and pB = 23

     pA +pB = 1

    => x2+ 23 = 1

    => x2 = 1 - 23

    => x2 = 13

    => x = 23

    Answered by Naveen Sharma (Jan 18, 2017)
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Define homologous and analogues 

Posted by sushanto choudhary (Jan 18, 2017) (Question ID: 1446)

  • Answers:
  • Homologous organs are those organs having same structure,origin and constituting parts but different functions are called homologous organs.

    Analogous organs are the organs having the same functions but different in structure, origin and constituting parts.

    Answered by shruti dadhwal (Jan 18, 2017)
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how to write a report on tobbaco free day?

 

Posted by rohit singh (Jan 18, 2017) (Question ID: 1445)

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