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Which of the following statement is/are correct about boron carbide?

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Important Questions on p- Block Elements

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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
In the structure of borax, the numbers of boron atoms and B - O - B units, respectively, are
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
The alloy used in the construction of aircrafts is:
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
The crystalline form of borax has
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
Which alloy is used to make an aircraft?
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
The correct statements among I to III regrading group 13 element oxides are,
(I) Boron trioxide is acidic.
(II) Oxides of aluminum and gallium are amphoteric.
(III) Oxides of indium and thallium are basic.
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
Which components are used in the preparation of scientific balance and light instruments?
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
AlCl3 when dissolved in acidified aqueous solution forms a compound in which hybridisation state of Al is
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
Sodium borate on reaction with conc.H2SO4 andC2H5OH gives a compound (A) which burns with a green edged flame. The compound (A) is :
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
Aluminium becomes passive in which of the following?
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.

A       HotconcentratedNaOH→Baqueous solution  Bubble gas Cto change pH→   Pure D

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A is. 
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
For NH 2 OH · HCl + NaNO 2 → X → Cu Y + A g ; which of the following is correct ?
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
Alum is found to contain hydrated monovalent cation MH2O6+, trivalent cation M'H2O63+ and SO42- in the ratio of:
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
A non-metallic element of Group-13, used in making bullet-proof vest is 
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
Aluminium is used for making alloys because of its
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.

Consider the following sequence of reactions:

B2O3+CaF2+H2SO4⟶(A)+(B)+H2O

(A)+LiAlH4⟶(C)(g)+(D)+LiF

(C)+H2O⟶Δ(D)+H2↑

(D)+Na2CO3⟶(E)+NaBO2+CO2↑

(E)+NH4Cl⟶(F)+B2O3+NaCl+H2O

What is the empirical formula mass of compound (F)?

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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
List some uses of boron and its compounds.
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
The element which exists in liquid state for a wide range of temperature and can be used for measuring high temperature is
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
Which of the following metals is used in aircraft construction?
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
The alloy of an element that is used in high temperature thermometer is 
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Chemistry>Inorganic Chemistry>p- Block Elements>Uses of Boron, Aluminium and their Compounds.
Cotyledons are also called-