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H 3 BO 3 → 1 0 0 ℃ X → 1 6 0 ℃ Y → Red hot B 2 O 3 , then X and Y are respectively

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Important Questions on The p-Block Elements

MEDIUM
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
The number of 2-centre-2-electron and 3-centre-2-electron bonds in B2H6, respectively, are:
EASY
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
The Lewis acid strength of BBr3, BCl3 and BF3 is in the order
MEDIUM
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
The green colour produced in the borax bead test of a chromium(III) salt is due to -
EASY
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
A mixture of Boron trichloride and hydrogen is subjected to silent electric discharge to form x and HCl. x is mixed with NH3 and heated to 2000C to form y. The formula of y is
EASY
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
Al2SO43 is used for a variety of purposes but not
HARD
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
Choose the correct statements about diborane;
I. It is prepared by the oxidation of sodium borohydride with iodine.
II. It undergoes cleavage reactions with Lewis bases to give borane adducts.
III. It is produced on an industrial scale by the reaction of BF3 with LiAlH4.
IV. It is readily hydrolysed by water to give borazine.
V. It burns in oxygen and gives boron trioxide.
MEDIUM
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
Diborane B2H6 reacts independently with O2 and H2O to produce, respectively:
EASY
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
Which of the following represents the structure of inorganic benzene?
EASY
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
Al2O3 reacts with
EASY
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
In the structure of borax, the numbers of boron atoms and B - O - B units, respectively, are
MEDIUM
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
When aqueous solutions of borax is acidified with HCl, we get
EASY
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
AlF3 is soluble in HF only in presence of KF. It is due to the formation of
MEDIUM
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
The order of acidic strength of boron trihalides
HARD
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
The reaction of H3N3B3Cl3A with LiBH4 in tetrahydrofuran gives inorganic benzene B . Further, the reaction of A with C leads to H3N3B3Me3 . Compounds B and C respectively, are:
EASY
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
In diborane ____ are present.
EASY
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
A Lewis acid 'X' reacts with LiAlH4 in ether medium to give a highly toxic gas. This gas when heated with NH3 gives a compound commonly known as inorganic benzene. The gas is
EASY
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
H3BO3 is
MEDIUM
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
Hydrolysis of BCl3 gives X which on treatment with sodium carbonate produces Y, X and Y respectively, are
EASY
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
Boric acid is an acid because its molecule
EASY
Chemistry>Inorganic Chemistry>The p-Block Elements>Important Compounds of Group 13 Elements
When a mixture of diborane and ammonia is heated, the final product is