Chemistry-
General
Easy

Question

The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is

  1. Benzoic acid
  2. Salicyladehyde
  3. Salicylic acid
  4. Phthalic acid

The correct answer is: Salicylic acid

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Which will not form a yellow precipitate on heating with an alkaline solution of iodine?

Which will not form a yellow precipitate on heating with an alkaline solution of iodine?

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A bi-convex lens is formed with two thin planoconvex lenses as shown in the figure Refractive index n of the first lens is 1.5 and that of the second lens s 1.2 Both the curved surfaces are of the same radius of curvature R = 14 cm For this bi-convex lens, for an object distance of 40 cm, the image distance will be

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physics-General
The cord is most likely to break at the orientation, when mass is at B as tension in the string at this point is maximum
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Two forces, each equal to F, act as shown in figure. Their resultant is

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R to the power of 2 end exponent equals F to the power of 2 end exponent plus F to the power of 2 end exponent plus 2 F to the power of 2 end exponent c o s 120 degree
or R to the power of 2 end exponent equals 2 F to the power of 2 end exponent plus 2 F to the power of 2 end exponent open parentheses negative fraction numerator 1 over denominator 2 end fraction close parentheses equals F to the power of 2 end exponent
or R equals F

Two forces, each equal to F, act as shown in figure. Their resultant is

physics-General
Note that the angle between two forces is 120degree and not 60degree.
R to the power of 2 end exponent equals F to the power of 2 end exponent plus F to the power of 2 end exponent plus 2 F to the power of 2 end exponent c o s 120 degree
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It is name reaction.

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It is name reaction.
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I s o- butyl alcohol  A True statement about  is

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I s o - butyl alcohol is secondary alcohol 
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If A equals d i g left parenthesis 2 comma negative 1 , 3 right parenthesis comma B equals d i g left parenthesis negative 1 , 3 comma 2 right parenthesis, then A to the power of 2 end exponent B equals

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equals open square brackets table row 4 0 0 row 0 1 0 row 0 0 9 end table close square brackets open square brackets table row cell negative 1 end cell 0 0 row 0 3 0 row 0 0 2 end table close square brackets equals open square brackets table row cell negative 4 end cell 0 0 row 0 3 0 row 0 0 18 end table close square brackets.

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Glycerol is dehydrated on heating with K H S O subscript 4
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Power alcohol is used to generate power.

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Power alcohol is used to generate power.
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The compound that will react most readily with N a O H to form methanol is:

chemistry-General
open parentheses C H subscript 3 close parentheses subscript 4 N to the power of plus I to the power of minus not stretchy ⟶ with N a O H on top open parentheses C H subscript 3 close parentheses subscript 4 N to the power of plus O H to the power of minus not stretchy rightwards arrow with straight capital delta on top open parentheses C H subscript 3 close parentheses subscript 3 N plus C H subscript 3 O H The reaction is more spontaneous for a better leaving group, I to the power of minus Also, methyl group with plus N will disperse plus v e spacecharge on N-atom to release I to the power of minus easily.
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The system of equations alpha x plus y plus z equals alpha minus 1 x plus alpha y plus z equals alpha minus 1 x plus y plus alpha z equals alpha minus 1has no solution, if alpha is

maths-General
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