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B(2)H(6) on reaction with methanol does ...

`B_(2)H_(6)` on reaction with methanol does not form

A

`H_(3)BO_(3)`

B

`B(CH_(3))_(3)`

C

`B(OMe)_(3)`

D

`BH_(2)(CH_(3))_(2)`

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Statement-1: B_(2)H_(6) on heating with excess of ammonia forms boron nitride. Statement-2: B_(2)H_(6) contain three centre two electron pair bonds.

B_(2)H_(6) reacts with NH_(3) to form

B_(2)H_(6) reacts with NH_(3) to form

Three moles of B_(2)H_(6) are completely reacted with methanol. The number of moles of boron containing product formed is.

Write the structure of B_(2)H_(6) and its reaction with HCl(excess).

Draw the structure of B_(2)H_(6) and give its reaction with HCl .

An organic compound (A) (C_(8)H_(14)O) forms an oxime and gives a positive haloform reaction. On ozonolysis, it gives acetone and a compound (B) (C_(5)H_(8)O_(2)) . (B) forms a dioxime and on subjecting to oxidation reaction gives an acid (C ) (C_(4)H_(6)O_(4)) . On treatment with excess of ammonia and strong heating, (C ) gives a neutral compound (D) (C_(4)H_(5)O_(2)N) . (D) on distillation with zinc dust forms pyrrloe. Suggest the possible structures of (A), (B), (C ), and (D). Explain the chemical reactions involved.

An aromatic compound 'A' having molecular formula C_(7)H_(6)O_(2) on treating with aqueous ammonia and heating forms compound 'B'. The compound 'B' on reaction with molecular bromine and potassium hydroxide provides compound 'C' having molecular formula C_(6)H_(7)N . The structure of 'A' is

A and B are functional isomers of compound C_(3)H_(6)O . On heating with NaOH and I_(2) isomer A froms yellow percipitate of iodoform whereas isomer B does not form any precipitate. Write the formulae of A and B.

(a) Write the chemical reaction involved in Wolf-Kishner reduction. (b) Arrange the following in the increasing order of their reactivity towards nucleophilic addition reaction : C_(6)H_(5)COCH_(3), CH_(3)-CHO, CH_(3)COCH_(3) (c) Why carboxylic acid does not give reactions of carbonyl group ? (d) Write the product in the following reaction. CH_(3)CH_(2)CH=CH-CH_(2)CN overset(1.(i-Bu)_(2)"AlH")underset(2. H_(2)O)(to) (e) A and B are two functional isomers of compound C_(3)H_(6)O . On heating with NaOH and I_(2) , isomer B forms yellow precipitate of iodoform whereas isomer A does not form any precipitate. Write the formulae of A and B.

VMC MODULES ENGLISH-p-BLOCK ELEMENTS-1-LEVEL 2
  1. From B(2)H(6), all the following can be prepared except

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  2. Borax is converted into crystalline boron by the following steps : B...

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  3. B(2)H(6) on reaction with methanol does not form

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  4. Which of the following is a true statement ?

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  5. Which of the following is sparingly soluble in cold water and fairly s...

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  6. Match the column:

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  7. Match the column:

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  8. Borax is actually made of two tetrahedra and two triangular units join...

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  9. Borax is actually made of two tetrahedra and two triangular units join...

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  10. The reason for small radius of Ga compared to Al is ……..

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  11. Which of the following statements are correct. Answer on the basis of ...

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  12. One can obtain a silica garden if :

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  13. Silicon carbide is used as

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  14. A student prepared a sample of silicon chloride by passing chlorine ov...

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  15. Assertion (A) : Silicones are water repelling in nature Reason (R) :...

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  16. The linear shape of CO(2) is due to ……….

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  17. Me(3)SiCl is used during polymerisation or organo silicones because

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  18. Which of the following statements are correct :

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  19. Identify the correct resonance structures of carbon dioxide from the o...

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  20. Silicon dissolves in excess of HF due to formation of

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