Give uses of boron and its compounds.
(N/A) Boron,being an extremely hard refractory solid with a high melting point,low density,and very low electrical conductivity,finds many applications.
$1$. Boron fibers are used in making bullet-proof vests and light composite materials for aircraft.
$2$. The boron-$10$ $({}^{10}B)$ isotope has a high ability to absorb neutrons; therefore,metal borides are used in the nuclear industry as protective shields and control rods.
$3$. The main industrial application of borax and boric acid is in the manufacture of heat-resistant glasses (e.g.,Pyrex),glass-wool,and fiberglass.
$4$. Borax is also used as a flux for soldering metals,for heat,scratch,and stain-resistant glazed coatings on earthenwares,and as a constituent of medicinal soaps.
$5$. An aqueous solution of orthoboric acid is generally used as a mild antiseptic.
$1$. Boron fibers are used in making bullet-proof vests and light composite materials for aircraft.
$2$. The boron-$10$ $({}^{10}B)$ isotope has a high ability to absorb neutrons; therefore,metal borides are used in the nuclear industry as protective shields and control rods.
$3$. The main industrial application of borax and boric acid is in the manufacture of heat-resistant glasses (e.g.,Pyrex),glass-wool,and fiberglass.
$4$. Borax is also used as a flux for soldering metals,for heat,scratch,and stain-resistant glazed coatings on earthenwares,and as a constituent of medicinal soaps.
$5$. An aqueous solution of orthoboric acid is generally used as a mild antiseptic.
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Which of the following statements are not correct?
$i$. Atomic radius of $Ga$ is less than that of $Al$
$ii$. The order of ionization enthalpy of group $13$ elements is $B > Al > Ga > In > Tl$
$iii$. Boron trioxide is amphoteric in nature
$i$. Atomic radius of $Ga$ is less than that of $Al$
$ii$. The order of ionization enthalpy of group $13$ elements is $B > Al > Ga > In > Tl$
$iii$. Boron trioxide is amphoteric in nature
Two elements $X$ and $Y$ react with highly electropositive metals to form binary compounds,which upon hydrolysis yield borane and silane,respectively. What are $X$ and $Y$?
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View SolutionThe correct statements from the following are:
$(A)$ Ionic radii of trivalent cations of group $13$ elements decrease down the group.
$(B)$ Electronegativity of group $13$ elements decreases down the group.
$(C)$ Among the group $13$ elements, Boron has the highest first ionisation enthalpy.
$(D)$ The trichlorides and triiodides of group $13$ elements are covalent in nature.
Choose the correct answer from the options given below:
$(A)$ Ionic radii of trivalent cations of group $13$ elements decrease down the group.
$(B)$ Electronegativity of group $13$ elements decreases down the group.
$(C)$ Among the group $13$ elements, Boron has the highest first ionisation enthalpy.
$(D)$ The trichlorides and triiodides of group $13$ elements are covalent in nature.
Choose the correct answer from the options given below:
DifficultJEE MAIN 2026
View SolutionAluminium $(III)$ chloride forms a dimer because
In the following reaction,assign the nature of the product formed by the complete hydrolysis of the underlined atom at $R.T.$:
$\underline{B}_2O_3 + 3H_2O \longrightarrow 2H_3BO_3$
$\underline{B}_2O_3 + 3H_2O \longrightarrow 2H_3BO_3$
Difficult
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