The value of n in the molecular formula Be n Al 2 Si 6 O 18 is . . . . . .
The stability of +1 oxidation state increases in the sequence:
Boron has an extremely high melting point because of
Select the incorrect statement
Whose aqueous solution is not acidic?
Which of the following is non- reducing?
Which of the halides does not exist?
Na 2 B 4 O 7 ⋅ 10 H 2 O is correctly represented as
Carbon forms a large number of compounds due to:
Boron nitride is isoelectronic with
Total cyclic isomers of B 3 N 3 H 4 X 2
In the reaction B 2 H 6 + 2 KOH + 2 X ⟶ 2 Y + 6 H 2 , X and Y are respectively
In Diborane correct statement is/are
Concentrated HNO 3 can be stored in container of
The process used for purification of bauxile ore containing high silica content as impurity is
Boric acid when burnt with ethylalcohol gives a green edged flame due to the combustion of
Which of the following is unreactive in air on heating
Reactivity of borazole is greater than that of benzene because
The H-B-H bridged angle in diborane
The oxidation state of Boron atom in borax is
Which is not true about borax ?
Which of the following element does not form cation in aqueous solution
The Hybridization of carbon in carbon sub oxide is
CCl 4 is used as fire extinguisher because
The BCl 3 is a planar molecule, whereas NCl 3 is pyramidal because
The structure and hybridization of Si(CH 3 ) 4 are
The hybrid states of C in diamond and graphite are respectively:
Boron does not form B 3+ ion, due to
Which of the following has least tendency to undergo catenation?
Which of the following is chemically inactive allotropic form of carbon?
Thalium (Tl) exhibits monovalency whereas Al exhibits trivalency. This is due to:
In the thermite process, iron oxide is reduced to molten iron by Al powder because
The process used for purification of bauxite ore containing high silica content as impurity is ?
Regarding Al wrong statement is ?
Electrolytic reduction of Alumina to Aluminium by Hall-Heroult process is carried out ?
Aluminum chloride exist as dimer in solid state A l 2 C l 6 . When dissolved in water it gives ?
Which of the following is unreactive in air on heating?
Borax when dissolved in water exhibits ?
N a 2 B 4 O 7 . 10 H 2 O Borax can also represented as ?
Boric acid when burnt with ethyl-alcohol gives a green edged flame due to the combustion of ?
Orthoboric acid on heating to 373K gives ?
Boric acid is prepared from the borax by the action of ?
The Hybridisation of boron and oxygen atoms in boric acid are respectively ?
Diborane reacts with carbon monoxide to form ?
In the reaction 2 X + B 2 H 6 B H 2 X 2 + B H 4 − Which of the following is not X?
When Boron is reacted with Conc. H 2 S O 4 , the gaseous product is ?
The H t – B – H t bond angle in diborane where Hydrogens are at terminal is ?
Methylation of Diborane give ?
Tau bonds formed by overlapping of ?
The non planar molecule among the following is ?
Which one of the following is not a Protonic acid ?
White fumes appear around the bottle of anhydrous aluminum chloride due to the formation of ?
How many moles of H C l react with one mole of borax to boric acid?
General electronic configuration of 13 group elements ?
Number of moles of O H – ions produced by dissolving 1 mole of H 3 B O 3 in water ?
Which of the following statement is not correct?
The valency of C in CO 3 2 – is
Among KO 2 , AlO 2 − , BaO 2 , and NO 2 + one unpaired electron is present in
Products of hydrolysis of B C l 3 are
The correct order of catenation among IVA group element is
The electronegativity of Aluminium is similar to
The correct order of Ionization potential among the Boron group elements
Thirteenth group element has highest density.
Al + X Y Water Z + NH 3 Here X, Y and Z are
Which of the following has no reaction with HCl
Among the following most electropositive element is
Dimeric Aluminium chloride and respective bond lengths are given below.
Thermite mixture used for welding is
Electrolytic reduction of Alumina to Aluminium by Hall-Heroult process is carried out
Aluminium chloride exist as dimer in solid state Al 2 Cl 6 when dissolved in water it gives
Diborane B 2 H 6 reacts independently with O 2 and H 2 O to produce, respectively.
The Hybridisation of boron and oxygen atoms in boric acid H 3 BO 3 are respectively
In the reaction 2 X + B 2 H 6 BH 2 X 2 + BH 4 − Which of the following is not X
Which of the following pair contains with same structure.
when Boron is reacted with Conc H 2 SO 4 , the gaseous product is
B 2 H 6 + N H 3 120 0 X . Where X is
Borazole on strong heating gives
The number of atoms involved in bridged bonds in one diborane molecule is
Correct order of Lewis acid order for Boron halides is
General electronic configuration of 13 group elements
Which of the following compound does not contain 3-centred-2-electron bond
B-H-B bridge in B 2 H 6 is formed by the sharing of
Products formed when Pb(NO 3 ) 2 is heated are :
Which of the following is only acidic in nature ?
Which of the following is not hydrolyzed?
Three centered bond is present in:
In the reaction LiH + AlH 3 ⟶ LiAlH 4 , AlH 3 and LiH act as
Boron compounds behave as Lewis acids because of their:
Which of the following oxides is amphoteric in character?
The stability of dihalides of Si, Ge, Sn, and Pb increases steadily in the sequence
In borax, the number of —- OH group attached to boron atoms is
For which one of the following minerals, the composition given is incorrect?
The stability of dihalides of Si, Ge, Sn and Pb increases steadily in the sequence
Which of the following is not a mineral of boron?
Which of the following compounds is formed in borax bead test?
Which is used in high temperature thermometry?
Which halides of the element of group 13 do not exist as dimer in the vapour state, the element is
Carbon shows tetravalency due to
The use of diamond as a gem depends on its
Which of the following is the correct chemical formula for cryolite ?
The relative stability of +1 oxidation state of group 13 elements follows the order.
The increasing order of atomic radii of the following group 13 elements is ?
The electronegativity of Aluminium is similar to ?
Which of the following is used in high temperature thermometry?
Which thirteenth group element has highest density?
Which of the following is least electronegative element?
The correct order of Ionization potential among the Boron group elements is ?
Which of the following statement is incorrect for the Boron family?
Which of the element of Boron family has highest melting point?
Which of the following element is not likely to act as central atom in M F 6 3 − ?
A l + X Δ Y + H 2 O Z + N H 3 identify X, Y and Z.
Among the following most electropositive element is ?
In metallurgy, the substance which can acts as deoxidizer is ?
Which of the following has no reaction with HCl?
Which one of the following has the lowest melting point?
In gold Schmidt reaction, certain metallic oxides are reduced to the molten metal by heating with ?
Which of the following element exhibit passivity with conc. H N O 3
Concentrated H N O 3 can be stored in container of ?
Thermite mixture used for welding is ?
Aluminium vessel should not be washed with materials containing caustic soda because ?
The process used for the purification of bauxite ore containing Iron oxide as impurity is known as ?
Dimeric Aluminium chloride and respective bond lengths are given below. Identify the correct option.
Diborane B 2 H 6 reacts independently with O 2 and H 2 O to produce, respectively.
The number of 2-centre-2-electron and 3-centre-2-electron bonds in diborane are respectively are
Borax bead test is not given by ?
Reactivity of borazole is greater than that of benzene because ?
In Borax, the number of B – O – B links and B – O – H bonds present are respectively.
The gas liberated when Aluminum reacts with conc. H 2 S O 4 .is ?
Boric acid is polymer due to ?
Which of the following pair contains same structure?
The number of σ and π bonds present in inorganic benzene are ?
The H-B-H bridged angle in diborane is ?
B 2 H 6 + N H 3 120 0 X What is X ?
Borazole on strong heating gives ?
Which of the following does not react with diborane?
Diborane reacts with NaH to give ?
Number of 3-centred-2-electron bonds in A l B H 4 3
Which of the following method can be used for the preparation of purest Boron ?
Which of the following compound does not contain 3-centred-2-electron bond?
Boron Carbide B 4 C is widely used for ?
The number of 3-centred-2-electron bond in B e B H 4 2 is ?
How many moles of N O 2 are produced when one mole of B reacts with H N O 3 ?
The number of atoms involved in bridged bonds in one diborane molecule is ?
The oxidation of N a B H 4 (Sodium Boro Hydride) with Iodine gives ?
Number of moles of O H – ions produced by dissolving 1 mole of H 3 B O 3 in water ?
Correct order of Lewis acid order for Boron halides is ?
Which element is used in measurement of high temperatures?
The number of 3-centre-2-electron and 2-centre-2-electron bonds in Diborane respectively are ?
The Hydride that is electron deficient is ?
Which of the following is the most stable oxidation state of Thallium?
The correct order of stability of +1 oxidation state of Group-13- elements follows :
Which of the following is not hydrolysed easily?
The element that shows greater ability to form Pπ – Pπ multiple Bonds is ?
Among the following Group 14-elements which one does not show catenation?
Identify the reaction which does not liberate Hydrogen
Example of most abundant three-dimensional silicate is ?
Heating an aqueous solution of aluminium chloride to dryness will give ?
Which of the following are Lewis acids?
Identify the incorrect statement.
What is the maximum covalency if silicon
How many of the following are inert to hydrolysis B F 3 , S i C l 4 , P C l 5 , S F 6
Which of the following is a pyrosilicate.
In the given diagram, the formula of the salt X is
When BCl 3 is strongly heated with ammonia the product formed is
The hydride that is not electron deficient is
Which of these statements is not true?
Which of the following statements regarding aluminium is not correct?
Which of these statements is not true
The number of 3-centre-2-electron and 2-centre-2-electron bonds in Di Borane respectively are
The correct order of stability of +1 oxidation state of Group-13- elements follows
How many of the following are Lewis acids CCl 4 , SiCl 4 , NH 3 , BCl 3 , AlCl 3 , CH 4
The strongest lewis acid among Boron Halides is ,
Which of the following minerals does not contain aluminium?
The relative stability of +1 oxidation state of group 13 elements follows the order.
Which of the following is used in high temperature thermometry
Which of the following is least electronegative element
Which of the following statement is incorrect for the Boron family
Which of the following element exhibit passivity with conc HNO 3
Which one of the following has the lowest melting point
The process used for the purification of bauxite ore containing Iron oxide impurity is known as
The number of 2-centre-2-electron and 3-centre-2-electron bonds in B 2 H 6 , respectively are
Boric acid is prepared from the borax by the action of
Borax when dissolved in water exhibits
Na 2 B 4 O 7 , 10 H 2 O (Borax) can also represented as
Orthoboric acid on heating to 373K gives
Diborane reacts with carbon monoxide to form
The gas liberated when Aluminium reacts with conc. H 2 SO 4 is
The number σ and π bonds present in inorganic benzene.
The H t − B − H t bond angle in diborane where Hydrogens are at terminal
Methylation of Diborane give Me = methyl group
The non planar molecule among the following is
Which of the following does not react with diborane
Diborane reacts with NaH gives
Which of the following method can be used for the preparation of purest Boron
Number of 3-centred-2-electron bonds in Al BH 4 3
B 4 C Boron Carbide is widely used for
The number of 3-centred-2-electron bond (Hydrogen bridges) in Be BH 4 2 is
How many moles of NO 2 are produced when one mole of B reacts with HNO 3
Tau bonds formed by overlapping of
The oxidation of NaBH 4 (Sodium Boro Hydride) with Iodine gives
White fumes appear around the bottle of anhydrous aluminium chloride due to the formation of
Which one of the following is not a Protonic acid
Number of moles of OH – ions produced by dissolving 1 mole of B OH 3 in water
How many moles of HCl react with one mole of borax to boric acid.
Which of the following statement is in correct.
About the crystalline form of Borax in correct statement is
An aqueous solution of alum is
The blue coloured mineral ‘Lapis Lazil’ used as semi precious stone.
BCl 3 does not exist as a dimer but BH 3 exist as, B 2 H 6 because
Which of the following is Incorrectly matched.
Which of the following is Incorrectly matched.
The values of X and Y in the below diagram is repectively
Stability of ions of Ge, Sn and Pb will be in the order
On the addition of mineral acid to an aqueous solution of borax, the following compound is formed
Thallium shows different oxidation states because
Which of the following compound is known as inorganic benzene?
Which of the following halides is least stable and has doubtful existence?
Which of the following is correct composition of water gas?
Which of the following is most stable?
Percentage of lead in lead pencil is:
The material used in solar cells contains:
Which is likely to show inert pair effect?
Nitrogen molecule is chemically less active because of its
Correct order of bond angles for the following is
BCl 3 does not exist as dimer but BH 3 exists as dimer (B 2 H 6 ) because
The bonds present in borazole are
Correct chemical formula of Red lead is
An aqueous solution of BCl 3 is:
The stability of +1 oxidation state increases in the sequence
Alumina on heating with carbon in nitrogen atmosphere give
Which of the following structure is non-planar ?
Anhydrous AICl 3 is obtained from
Al 2 O 3 can be converted into anhydrous AlCl 3 by heating
The solution of borax in water is
BF 3 is used as catalyst in several industrial processes due to its
The chemical formula of feldspar is:
The straight chain polymer is formed by :
Which of the following is pseudo alum?
Which of the following statement about boron carbide is wrong?
Which one of the following methyl diboranes does not exist?
Al dissolves in molten NaOH with the formation of
In borax bead test the colour is due to formation of
Which is correct for the structure of diborane?
The structure and hybridisation of Si(CH 3 ) 4 is:
Boron cannot form which one of the following anions
Which of the following minerals does not contain aluminium?
Which one of the following is hardest compound of boron?
When aluminium is heated in atomoshere of nitrogen it forms:
The colour of ferric metaborate is
Which of the following exhibits inert pair effect?
Which one of the following is more abundant in the earth’s crust?
The liquified metal expanding on solidification is
Aluminium vessels should not be washed with materials containing washing soda because:
B 2 H 6 and B 4 H 10 respectively are examples of
Which of the following atom would likely form a cation.
Which of the following is a good conductor of electricity?
Which of the following statement is false about carbon?
The element which forms only one hydride is:
In the ground state, carbon atom has how many unpaired electron(s)?
Interlayer distance in graphite is:
Aluminium is more reactive than iron. But aluminium is less easily corroded than iron because
In CH 4 , valency of carbon is four. Valency of carbon in acetylene is
Thallium shows different oxidation states due to: