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    • Posted by Diya Goyal 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Yogita Ingle 5 years, 6 months ago

    Griffith’s Experiment

    Griffith experimented with Streptococcus pneumoniae bacteria. This bacteria causes Pneumonia.Two strains of this bacteria were used R-strain & S-strain.

    • S strain
      • Smooth mucous polysaccharide coat
      • Resistant to immune system
      • Virulent
    • R strain
      • Lacks the coat
      • Destroyed by immune system of the host
      • Non-virulent

    The experiment was performed in multiple steps.

    1. S-strain (virulent) was injected into mouse. It was found that the mouse died of pneumonia
    2. R-strain (non-virulent) was injected into mouse. It was found that the mouse remained alive .
    3. Heat killed S-strain (S-strain bacteria were killed by heating) was injected into mouse. It was found that the mouse remained alive .
    4. Heat killed S-strain & live R-strain were injected into mouse. It was found that the mouse died of pneumonia

    1Thank You

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    • Posted by Usham Amelia 5 years, 6 months ago

    CBSE > Class 12 > Computer Science
    • 0 answers
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    • Posted by Snaya Sehrawat 5 years, 6 months ago

    CBSE > Class 12 > English Core
    • 0 answers
    ANSWER

    • Posted by Mitali Goyal 5 years, 6 months ago

    CBSE > Class 12 > Accountancy
    • 0 answers
    ANSWER

    • Posted by Paras Chauhan 5 years, 6 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Paras Chauhan 5 years, 4 months ago

    Fh

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    • Posted by Paras Chauhan 5 years, 6 months ago

    CBSE > Class 12 > Physics
    • 3 answers

    Paras Chauhan 5 years, 6 months ago

    Thanku

    0Thank You

    Yogita Ingle 5 years, 6 months ago

    Adsorption is a process which involves the accumulation of a substance in molecular species in higher concentration on the surface. If we look at Hydrogen, Nitrogen and Oxygen, these gases adsorb on activated charcoal. Meanwhile, we have to note that adsorption is different from absorption. The two processes involve totally different mechanisms.

    For the adsorption process, two components are required,

    • Adsorbate: Substance which is deposited on the surface of another substance. For example, H2, N2 and O2 gases.
    • Adsorbent: Surface of a substance on which adsorbate adsorbs. For example, Charcoal, Silica gel, Alumina.

    2Thank You

    Rohit Krishna 5 years, 6 months ago

    The accumulation of molecular species at the surface rather than in the bulk of solid or liquid is termed as adsorption.

    1Thank You

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    • Posted by Shrestha Bisht 5 years, 6 months ago

    CBSE > Class 12 > Home Science
    • 1 answers

    ?Royal Thakur? 5 years, 6 months ago

    Go on YouTube

    5Thank You

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    • Posted by Dechen Chuchik 5 years, 6 months ago

    CBSE > Class 12 > Physical Education
    • 2 answers

    Priya Mangla 5 years, 6 months ago

    It is a type of tournament in which one team wins and other team loses the tournament directly

    0Thank You

    Riya Rana 5 years, 6 months ago

    In knock out tournament, a team that loses directly gets eliminated without getting any second chance. time and money is saved via such tournaments.

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    • Posted by Ayush Vatsal 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Riya Rana 5 years, 6 months ago

    Thermosetting polymer is a type of polymer that can not be remoulded into any other shape (whereas thermoplastic polymer can like plastic.) eg :- bakelite

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    • Posted by Mk.P Kumar 5 years, 6 months ago

    CBSE > Class 12 > English Core
    • 2 answers

    Khushi Varshney 5 years, 6 months ago

    In the text, Annes jung clarified this statement with her own example. She had made a promise to open a school to Saheb (jokingly) but another day when saheb asked him whether the school was ready or not, she could not answer that.It shows that promises made to poor children are never kept.Entire world is full of such hollow promises.

    0Thank You

    Riya Rana 5 years, 6 months ago

    Promises that are made to children are indeed not kept can be explained from the text "lost spring" where author is very intrigued by the lifestyle of Saheb and his other friends and family and wanted to know about them, she asks him why doesnt he go to school which later she realised how vague her question must havebeen sounded, but to her question Saheb answers that there is no school nearby and when there will be one he will go to it. Authors furthur asks him that if she will built a school woulf he come? Listening to this Saheb's eyes shined which made the author very guilty because this was a promise of hers that was made to be unkept and then later did she realise that there must be many such promises made by many people like her to poor children. Hence, making promises which are made to be unkept fills these childrens' world with darkness and therefore have to live in a bleak world full of unkept promises.

    4Thank You

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    • Posted by Àĺķá Àñàmìķà 5 years, 6 months ago

    CBSE > Class 12 > Physics
    • 3 answers

    Avinash Shukla 5 years, 6 months ago

    Charging by induction

    0Thank You

    Riya Rana 5 years, 6 months ago

    By bringing a negatively charged rod near the metal sphere, through induction all the positive charge is collected near the rod, then the other side of the metal can be earthed to remove all the negative charge. Hence in the end we get a positively charged metallic sphere.

    1Thank You

    Premraj Verma 5 years, 6 months ago

    By induction; using negatively charged another sphere

    0Thank You

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    • Posted by Sunil Katal 5 years, 6 months ago

    CBSE > Class 12 > Geography
    • 0 answers
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    • Posted by Sunil Katal 5 years, 6 months ago

    CBSE > Class 12 > Geography
    • 0 answers
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    • Posted by Sunil Katal 5 years, 6 months ago

    CBSE > Class 12 > Geography
    • 0 answers
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    • Posted by Gaurav Paul 5 years, 6 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Riya Rana 5 years, 6 months ago

    It is the amount of work done to carry a unit of charge particle from infinity { V=W/q } And potential for a point charge = kq/r.

    0Thank You

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    • Posted by Maninder Kaur 5 years, 6 months ago

    CBSE > Class 12 > हिंदी ऐच्छिक
    • 0 answers
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    • Posted by Tejashwini Devendra 5 years, 6 months ago

    CBSE > Class 12 > Biology
    • 1 answers

    Riya Rana 5 years, 6 months ago

    The zygote divides and form a large mass of cell containing trophoblast and inner cell mass called the blastocyst. Blastocyst is the stage that is implanted in the uterus. The inner cell mass forms the embryo and the trophoblast forms the trophoblast forms the villi.

    1Thank You

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    • Posted by Crazy World 5 years, 6 months ago

    CBSE > Class 12 > Physics
    • 0 answers
    ANSWER

    • Posted by Vikas Mehta 5 years, 6 months ago

    CBSE > Class 12 > हिंदी कोर
    • 0 answers
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    • Posted by Renu Sahu 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Riya Rana 5 years, 6 months ago

    2. Terylene

    1Thank You

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    • Posted by Renu Sahu 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Riya Rana 5 years, 6 months ago

    4. Teraphthalic acid

    1Thank You

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    • Posted by Gunjan Saxena 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 2 answers

    Aditya Singh 5 years, 6 months ago

    By steam distillation

    0Thank You

    Riya Rana 5 years, 6 months ago

    O-nitrophenol is steam volatile. Hence, can be separated from p-nitrophenol.

    0Thank You

    ANSWER

    • Posted by Shanu Kumar 5 years, 6 months ago

    CBSE > Class 12 > History
    • 1 answers

    Prashant Kaushik 5 years, 6 months ago

    feature of harappan culture are; <1> there are evidence of agriculture and postrolism <2> settlement were small and mostly houses of very small and no evidence of big building <3> there are evidence large scale burning and some side indicating the settlement.

    1Thank You

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    • Posted by Renu Sahu 5 years, 6 months ago

    CBSE > Class 12 > Chemistry
    • 3 answers

    Priya Parjapati 5 years, 6 months ago

    Orlon

    1Thank You

    Aditya Singh 5 years, 6 months ago

    Orlon

    1Thank You

    Riya Rana 5 years, 6 months ago

    4. Orlon

    1Thank You

    ANSWER

    • Posted by Sujita Sahu 5 years, 6 months ago

    CBSE > Class 12 > English Core
    • 3 answers

    Khushi Varshney 5 years, 6 months ago

    Because they have a long-lasting impact on our mind and brings smile on our face everytime we remember them.Their beauty only increases. So they can never become useless.

    0Thank You

    Naveen Yadav 5 years, 6 months ago

    Ok thanks

    0Thank You

    Aman Dhiman 5 years, 6 months ago

    Because they keep thier beauty invisible

    3Thank You

    ANSWER

    • Posted by Atul Kumar 5 years, 6 months ago

    CBSE > Class 12 > English Core
    • 1 answers

    Khushi Varshney 5 years, 6 months ago

    Bcoz he was an honest person who realizes that he himself was also responsible for the current situation.

    0Thank You

    ANSWER

    • Posted by Nisha Yadav 5 years, 6 months ago

    CBSE > Class 12 > English Core
    • 0 answers
    ANSWER

    • Posted by Shubham Ray 5 years, 6 months ago

    CBSE > Class 12 > Mathematics
    • 0 answers
    ANSWER

    • Posted by Sakshi Jain 5 years, 6 months ago

    CBSE > Class 12 > Accountancy
    • 0 answers
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    • Posted by Santosh Kumar 5 years, 6 months ago

    CBSE > Class 12 > English Core
    • 0 answers
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