EASY
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What are the uses of orthoboric acid?

Important Questions on Some p-Block Elements

HARD
Among the following, the correct statement(s) is(are)
MEDIUM
The number of 2-centre-2-electron and 3-centre-2-electron bonds in B2H6, respectively, are:
HARD
The correct statement(s) for orthoboric acid is/are
EASY

Which of the following solution is used as washing solution for eyes to free them from microorganisms?

MEDIUM
The green colour produced in the borax bead test of a chromium(III) salt is due to -
EASY
AlF3 is soluble in HF only in presence of KF. It is due to the formation of
MEDIUM
The order of acidic strength of boron trihalides
MEDIUM

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : Boric acid is a weak acid

Reason R : Boric acid is not able to release H+ ion on its own. It receives OH- ion from water and releases H+ ion.

In the light of the above statements, choose the most appropriate answer from the options given below.

MEDIUM
Boric acid in solid, whereas BF3 is gas at room temperature because of
HARD
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
The set in which compounds have different nature is:
EASY
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
MEDIUM
Diborane B2H6 reacts independently with O2 and H2O to produce, respectively:
MEDIUM
When aqueous solutions of borax is acidified with HCl, we get
EASY
Which of the following represents the structure of inorganic benzene?
EASY

The correct statements from below are:

(I) H3BO3 is a liquid
(II) H3BO3 forms a layer structure
(III) In H3BO3, each BO3 unit is joined by hydrogen bonds
(IV) H3BO3 is tribasic.

MEDIUM

Identify the correct statements from the following:

(a) In Orthoboric acid, boron is in planar geometry. 

(b) In BCl3·NH3, boron has tetrahedral geometry. 

(c) Aqueous solution of borax is acidic.