p-Block Elements — practice questions
114 curated practice questions from p-Block Elements (Chemistry JEE Advanced, NTA Exams) — 106 hard, 8 medium. Every question includes the final answer free; step-by-step worked solutions with a free account.
- Borax is used as a cleansing agent because on dissolving in water, it gives:
- (Me) 2 SiCl 2 on hydrolysis will produce (2003)
- In the reaction, 2 X + B _ 2 H _ 6 [ BH _ 2 ( X )_ 2 ]^ + [ BH _ 4 ]^ - the amine(s) X is (are) (2009)
- When an inorganic compound (X) having 3C—2e as well as 2C-2e bonds reacts with ammonia gas at a certain temperature…
- The oxidation state of xenon atom in XeF 4 , HXeO 4 and Na 4 XeO 6 are respectively:
- Na 2 B 4 O 7 .10H 2 O is correctly represented as:
- Under hydrolytic conditions, the compounds used for preparation of linear polymer and for chain termination…
- The compound(s) having peroxide linkage is(are) : (2024)
- Which of the following statements are true for H 3 BO 3 ?
- Orthoboric acid behaves as a weak monobasic acid giving H 3 O + and
- The species formed on fluorination of phosphorus pentachloride in a polar organic solvent are : (2024)
- B(OH) 3 + NaOH NaBO 2 + Na[B(OH) 4 ] + H 2 O How can this reaction is made to proceed in forward direction?
- There are some deposits of nitrates and phosphates in earth’s crust. Nitrates are more soluble in water. Nitrates are…
- Based on the compounds of group 15 elements, the correct statement(s) is (are) (2018)
- Statement-1 : Pb 4+ compounds are stronger oxidizing agents than Sn 4+ compounds. Statement-2 : The higher oxidation…
- (i) P + C ( carbon )+ Cl _ 2 Q + CO (ii) Q + H _ 2 O R + HCl (iii) BN + H _ 2 O R + NH _ 3 (iv) Q + LiAlH _ 4 ~S + LiCl…
- Assertion (A) : In water, orthoboric acid behaves as a weak monobasic acid. Reason (R) : In water, orthoboric acid acts…
- Ca _ 2 ~B _ 6 O _ 11 + Na _ 2 CO _ 3 Fused ( A )+( B )+ CaCO _ 3 ( A )+ CO _ 2 ( ~B )+ Na _ 2 CO _ 3 ( B )+ Conc. HCl…
- The reaction of white phosphorus with aqueous NaOH gives phosphine along with another phosphorus containing compound…
- The order of the oxidation state of the phosphorus atom in H 3 PO 2 , H 3 PO 4 , H 3 PO 3 and H 4 P 2 O 6 is (2018)
- In which of the following reactions O 2 is not formed as one of the product?
- In the reaction 2 X + B _ 2 H _ 6 [ BH _ 2 X _ 2 ]^ + [ BH _ 4 ]^ - the amine(s) X is (are) :
- The reaction of P 4 with X leads selectively to P 4 O 6 . The X, is (2009)
- Ca _ 2 ~B _ 6 O _ 11 + Na _ 2 CO _ 3 Fused ( A )+( B )+ CaCO _ 3 ( A )+ CO _ 2 ( ~B )+ Na _ 2 CO _ 3 ( B )+ Conc. HCl…
- Match the reactions (in the given stoichiometry of the reactants) in List-I with one of their productsgiven in List-II…
- Statement-1 : Pb 4+ compounds are stronger oxidising agents than Sn 2+ compounds. Statement-2 : The higher oxidation…
- Boron does not form B 3+ cation easily. It is due to:
- Boric acid is used in carrom boards for smooth gliding of pawns because:
- The formation of which of the substance is known as tailing of mercury?
- Which of the following statements about anhydrous aluminium chloride is correct?
- Assertion (A) : Borax bead test is not suitable for Al (III) Reason (R) : Al 2 O 3 is insoluble in water.
- (i) P + C ( carbon )+ Cl _ 2 Q + CO (ii) Q + H _ 2 O R + HCl (iii) BN + H _ 2 O R + NH _ 3 (iv) Q + LiAlH _ 4 ~S + LiCl…
- The correct statement(s) for orthoboric acid is/are (2017)
- Which of the following oxides of nitrogen is a coloured gas ?
- Aluminium is stable in air and water in spite of the fact that it is reactive metal. The reason is that a thin film of…
- Aluminium is stable in air and water in spite of the fact that it is reactive metal. The reason is that a thin film of…
- N 2 H 4 reacts with conc. H 2 SO 4 to produce a salt [NH 3 – NH 3 ] 2+ SO _ 4 ^ 2- in which
- Aluminium is stable in air and water in spite of the fact that it is reactive metal. The reason is that a thin film of…
- The compound(s) which generates N 2 gas upon thermal decomposition below 300ºC is (are) (2018)
- Hydride of boron occurs as B 2 H 6 but B 2 Cl 6 does not exist. This is because :
- Statement-1 : In water, orthoboric acid behaves as a weak monobasic acid because. Statement-2 : In water, orthoboric…
- In the following statements which combination of true (T) and false (F)options is correct? (I) Ionic mobility is the…
- Liquid ammonia bottles are opened after cooling them in ice for sometime. It is because liquid NH 3
- Al 2 O 3 can be converted to anhydrous AlCl 3 by heating:
- (i) Boron + O _ 2 700^ C ( X ) (ii) ( X )+ C ( carbon )+ Cl _ 2 ( Y )+ CO (iii) ( Y )+ LiAlH _ 4 ( Z )+ LiCl + AlCl _ 3…
- At room temperature, disproportionation of an aqueous solution of in situ generated nitrous acid (HNO 2 ) gives the…
- B (OH) 3 + NaOH ⇌ NaBO 2 + Na [B (OH) 4 ] + H 2 O How can this reaction is made to proceed in forward direction ? (2006)
- Assertion (A) : Boron always forms covalent bond. Reason (R) : The small size of B 3+ favours formation of covalent…
- The noble gases have closed-shell electronic configuration and are monoatomic gases under normal conditions. The low…
- (i) Boron + O _ 2 700^ C ( X ) (ii) ( X )+ C ( carbon )+ Cl _ 2 ( Y )+ CO (iii) ( Y )+ LiAlH _ 4 ( Z )+ LiCl + AlCl _ 3…
- The nitrogen oxide (s) that contain (s) N—N bonds (s) is (are) (2009)
- The number of S—S bonds in sulphur trioxide trimer, (S 3 O 9 ) is (2001)
- The product formed in the reaction of SOCl 2 with phosphorous is (2014)
- The noble gases have closed-shell electronic configuration and are monoatomic gases under normal conditions. The low…
- What products are expected from disproportionation reaction of hypochlorus acid?
- There are some deposits of nitrates and phosphates in earth’s crust. Nitrates are more soluble in water. Nitrates are…
- The correct statement(s) related to oxoacids of phosphorous is(are) (2021)
- White phosphorus on reaction with limewater gives calcium salt of an acid (A) along with a gas (X). Which of the…
- Sulphur on reaction with concentrated HNO 3 gives (A) which reacts with NaOH gives (B). (A) and (B) are:
- The increasing order of atomic radii of the following Group 13 elements is (2016)
- In the cationic parts of solid N 2 O 5 and solid N 2 O 4 , the bond order of N–O are, respectively,
- The nitrogen containing compound produced in the reaction of HNO 3 with P 4 O 10 (2016)
- The correct statement(s) regarding. (i) HClO, (ii) HClO 2 , (iii) HClO 3 and (iv) HClO 4 , is (are) (2015)
- The colour of the X 2 molecules of group 17 elements changes gradually from yellow to violet down the group. This is…
- Name the structure of silicates in which three oxygen atoms of [SiO 4 ] 4– are shared is (2005)
- Aluminium is stable in air and water in spite of the fact that it is reactive metal. The reason is that a thin film of…
- (i) Boron + O _ 2 700^ C ( X ) (ii) ( X )+ C ( carbon )+ Cl _ 2 ( Y )+ CO (iii) ( Y )+ LiAlH _ 4 ( Z )+ LiCl + AlCl _ 3…
- Ca _ 2 ~B _ 6 O _ 11 + Na _ 2 CO _ 3 Fused ( A )+( B )+ CaCO _ 3 ( A )+ CO _ 2 ( ~B )+ Na _ 2 CO _ 3 ( B )+ Conc. HCl…
- Statement-1 : In water, orthoboric acid behaves as a weak monobasic acid. Statement-2 : In water, orthoboric acid acts…
- When sulphur is boiled with Na 2 SO 3 , a compound (A) is produced. (A) with excess of AgNO 3 solution gives a compound…
- Aqueous solution of Na 2 S 2 O 3 on reaction with Cl 2 gives (2008)
- (i) P + C ( carbon )+ Cl _ 2 Q + CO (ii) Q + H _ 2 O R + HCl (iii) BN + H _ 2 O R + NH _ 3 (iv) Q + LiAlH _ 4 ~S + LiCl…
- Statement-1 : Al(OH) 3 is amphoteric in nature Statement-2 : Al–O and O–H bonds can be broken with equal ease in Al(OH)…
- The correct statement(s) about the oxoacids, HClO 4 and HClO, is (are) (2017)
- When an inorganic compound reacts with SO 2 in aqueous medium produces (A). (A) on reaction with Na 2 CO 3 gives the…
- The reddish-brown coloured gas formed when nitric oxide is oxidised by air is
- Aluminium is stable in air and water in spite of the fact that it is reactive metal. The reason is that a thin film of…
- The structure of diborane (B 2 H 6 ) contains :
- The number of S—S bonds in sulphur trioxide trimer S 3 O 9 is:
- Which of the following halides is least stable and has doubtful existence?
- Aluminium is stable in air and water in spite of the fact that it is reactive metal. The reason is that a thin film of…
- The following acids have been arranged in the order of decreasing acid strength. Identify the correct order. ClOH (I)…
- Which gas is evolved when PbO 2 is treated with conc. HNO 3 ? (2005)
- For H 3 PO 3 and H 3 PO 4 the correct choice is (2003)
- In which of the following, a salt of the type KMO 2 is obtained?
- Ca _ 2 ~B _ 6 O _ 11 + Na _ 2 CO _ 3 Fused ( A )+( B )+ CaCO _ 3 ( A )+ CO _ 2 ( ~B )+ Na _ 2 CO _ 3 ( B )+ Conc. HCl…
- Which of the following is the life saving mixture for an asthma patient ?
- Among the oxides given below which are acidic? CrO 3 , Mn 2 O 7 , CuO, CO, SO 2
- Orthoboric acid (H 3 BO 3 ) and metaboric acid (HBO 2 ) differ in respect of:
- The products of the chemical reaction between Na 2 S 2 O 3 , Cl 2 and H 2 O are:
- Assertion (A) : BF 3 is a weaker Lewis acid than BCl 3 . Reason (R) : BF 3 molecule is stabilized to a greater extent…
- HClO 4 + P 2 O 5 → (A) + (B) (A) and (B) are:
- Statement-1 : Boron always forms covalent bond. because Statement-2 : The small size of B 3+ favours formation of…
- Identify the correct order of acidic strength of CO 2 , CuO, CaO, H 2 O. (2002)
- Ca _ 2 ~B _ 6 O _ 11 + Na _ 2 CO _ 3 Fused ( A )+( B )+ CaCO _ 3 ( A )+ CO _ 2 ( ~B )+ Na _ 2 CO _ 3 ( B )+ Conc. HCl…
- The reaction of white phosphorus with aqueous NaOH gives phosphine and another phosphorus containing compound. The…
- B Z X [ heat ] LiH Y + LiF Which of the statement is true for the above sequence of reactions?
- The noble gases have closed-shell electronic configuration and are monoatomic gases under normal conditions. The low…
- Amorphous boron is extracted from borax by following steps: Borax ( A ) H _ 3 BO _ 3 Heat B _ 2 O _ 3 ( ~B ) Boron. (A)…
- In the reaction 3 Br _ 2 +6 CO _ 3 ^ 2- +3 H _ 2 O 5 Br + BrO _ 3 ^ - +6 HCO _ 3 ^ -
- Statement-1: Between SiCl 4 and CCl 4 only SiCl 4 reacts with water. Statement-2: SiCl 4 is ionic and CCl 4 is…
- Which of the following reactions of xenon compounds is not feasible?
- The reaction of Pb(NO 3 ) 2 and NaCl in water produces a precipitate that dissolves upon the addition of HCl of…
- The number of P—O—P bonds in cyclic metaphosphoric acid is (2000)
- Assertion (A) : AlF 3 is soluble in KF but addition of BF 3 brings its precipitation. Reason (R) : BF 3 is more acidic…
- A pale blue liquid which obtained by equimolar mixture of two gases at – 30ºC is (2005)
- Which of the following has the highest boiling point? H _ 2 O , H _ 2 ~S , H _ 2 Se and H _ 2 Te
- The percentage of p-character in the orbitals forming P—P bonds in P 4 is (2007)
- Which of the following isomers of phosphorus is thermodynamically most stable ? (2005)
- With respect to graphite and diamond, which of the statement(s) given below is (are) correct ? (2012)
- Which of the following is not oxidised by O 3 ? (2005)
- H _ 3 BO _ 3 100^ C X 160^ C Y Red hot B _ 2 O _ 3 ; X and Y respectively are:
- Which of the following compounds is formed in borax bead test?
- (i) Boron + O _ 2 700^ C ( X ) (ii) ( X )+ C ( carbon )+ Cl _ 2 ( Y )+ CO (iii) ( Y )+ LiAlH _ 4 ( Z )+ LiCl + AlCl _ 3…