General
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Chemistry-

In the reaction R – OH + HX → R – X + H2O, The reactivity of different alcohols is

Chemistry-General

  1. Tertiary > Secondary > Primary    
  2. Tertiary > Secondary < Primary    
  3. Tertiary < Secondary > Primary    
  4. Secondary < Primacy < Tertiary    

    Answer:The correct answer is: Tertiary > Secondary > PrimaryThis is because the order the relative stabilities of the carbocation formed in this reactions is : tertiary > secondary > primary.

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    If A is a square matrix of order 3 then ∣ Adj open parentheses bold Adj space A squared close parentheses ∣ equals

    If A is a square matrix of order 3 then ∣ Adj open parentheses bold Adj space A squared close parentheses ∣ equals

    maths-General
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    The reagents for the following conversions is / are

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    The reagents for the following conversions is / are

    chemistry-General
    Simple alkyl halides are dehydrohalogenated by using a strong base such as alc. KOH. But vinyl halides require much stronger base such as NaNH2 for dehydrohalogenation .
    General
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    In the following reaction : The major product obtained is

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    In the following reaction : The major product obtained is

    chemistry-General
    Ease of abstraction of H is: 3° > 2° > 1°. Therefore, option (a) is correct
    General
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    The major product in the reaction is

    CH3O is a strong nucleophile as well as a strong base. Therefore, it can either bring about substitution or elimination. Since the CH3 group at b-carbon causes stearic hindrance to nucleophilic substitution (SN2), therefore, elimination occurs preferably to form 2- mehtylpropene

    The major product in the reaction is

    chemistry-General
    CH3O is a strong nucleophile as well as a strong base. Therefore, it can either bring about substitution or elimination. Since the CH3 group at b-carbon causes stearic hindrance to nucleophilic substitution (SN2), therefore, elimination occurs preferably to form 2- mehtylpropene
    General
    chemistry-

    Which one is a nucleophilic substitution reaction among the following?

    Conceptual

    Which one is a nucleophilic substitution reaction among the following?

    chemistry-General
    Conceptual
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    chemistry-

    Which of the following compounds will undergo racemization when solution of KOH hydrolyses?
    i)
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    iii)
    iv) </span

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    i)
    ii) CH3CH2CH2Cl
    iii)
    iv) </span

    chemistry-General
    Due to chirality of open parentheses H minus stack stack stack stack C with vertical line below with C subscript 2 end subscript H subscript 5 end subscript below with vertical line on top with C H subscript 3 end subscript on top minus C l close parentheses only compound (d) will undergo reacemisation
    General
    physics-

    Consider the given velocity-time graph It represents the motion of

    Consider the given velocity-time graph It represents the motion of

    physics-General
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    An aero plane moving horizontally at a speed of 200 blank m divided by s and at a height of 8.0 cross times 10 to the power of 3 end exponent blank m is to drop a bomb on a target. At what horizontal distance from the target should the bomb be released

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    An aero plane moving horizontally at a speed of 200 blank m divided by s and at a height of 8.0 cross times 10 to the power of 3 end exponent blank m is to drop a bomb on a target. At what horizontal distance from the target should the bomb be released

    physics-General
    Horizontal distance travelled by the bomb S equals u cross times t
    equals 200 cross times square root of fraction numerator 2 h over denominator g end fraction end root equals 200 cross times square root of fraction numerator 2 cross times 8 cross times 10 to the power of 3 end exponent over denominator 9.8 end fraction end root equals 8.081 blank k m
    General
    chemistry-

    Which of the carbon atoms present in the molecule given below are asymmetric?

    (ii) and (iii) carbon atoms are asymmetric

    Which of the carbon atoms present in the molecule given below are asymmetric?

    chemistry-General
    (ii) and (iii) carbon atoms are asymmetric
    General
    chemistry-

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    Out of phenoxide and ethnocide ion, only ethoxide ion will react with iodoethane to give diethyl ether C subscript 2 end subscript H subscript 5 end subscript I plus to the power of minus end exponent O C subscript 2 end subscript H subscript 5 end subscript rightwards arrow C subscript 2 end subscript H subscript 5 end subscript minus O minus C subscript 2 end subscript H subscript 5 end subscript plus I to the power of minus end exponent
    General
    chemistry-

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    Since OCH3 group is bulkier than CH3 i.e., sterically less hindered ; product (I) is formed Therefore option (B) is correct

    The major product obtained on monobromination (with Br2/ FeBr3) of the following compound A is

    chemistry-General
    Since both OCH3 and CH3 are o. p directing, the following products are possible

    Since OCH3 group is bulkier than CH3 i.e., sterically less hindered ; product (I) is formed Therefore option (B) is correct
    General
    chemistry-

    Which of the following pairs are correctly matched?

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    chemistry-General
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    General
    chemistry-

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    The name of monomers present in the following polymer

    chemistry-General
    General
    chemistry-

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    (CH3)2CHCl + NaI →(CH3)2CHI + NaCl The above reaction is known as

    chemistry-General
    General
    physics-

    Two particles 1 and 2 are projected with same speed v as shown in figure. Particle 2 is on the ground and particle 1 is at a height h from the ground and at a horizontal distance s from particle 2. If a graph is plotted between v and s for the condition of collision of the two then (v on y-axis and s on x-axis)

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    or v equals square root of fraction numerator g over denominator 8 h end fraction end root
    Which is a straight line passing through origin with slopesquare root of fraction numerator g over denominator 8 h end fraction end root

    Two particles 1 and 2 are projected with same speed v as shown in figure. Particle 2 is on the ground and particle 1 is at a height h from the ground and at a horizontal distance s from particle 2. If a graph is plotted between v and s for the condition of collision of the two then (v on y-axis and s on x-axis)

    physics-General
    Assuming particle 2 to be at rest, substituting in
    y equals x tan invisible function application theta minus fraction numerator g x to the power of 2 end exponent over denominator 2 u to the power of 2 end exponent cos to the power of 2 end exponent invisible function application theta end fraction blank left parenthesis theta equals 0 degree right parenthesis

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    or v equals square root of fraction numerator g over denominator 8 h end fraction end root
    Which is a straight line passing through origin with slopesquare root of fraction numerator g over denominator 8 h end fraction end root