Ncert Solutions Chemistry Class 11th
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PCl5 is well known, but NCl5 is not. Because
(a) Nitrogen is less reactive than phosphorous
(b) Nitrogen doesn’t have d-orbitals in its valence shell.
(c) catenation tendency is weaker in nitrogen than phosphorous
(d) size of phosphorous is larger than nitrogen
PCl5 is well known, but NCl5 is not. Because
(a) Nitrogen is less reactive than phosphorous
(b) Nitrogen doesn’t have d-orbitals in its valence shell.
(c) catenation tendency is weaker in nitrogen than phosphorous
(d) size of phosphorous is larger than nitrogen
Phosphorous can expand its covalency beyond 4, as it has vacant 3d orbitals. Nitrogen can't expand its covelency beyond 4, as it does not posses vacant 3d- orbitals.
Upvote 
Which one of the following compounds is used as a chemical in certain type of fire extinguishers?
Which one of the following compounds is used as a chemical in certain type of fire extinguishers?
Fire extinguisher contains sodium Bicarbonate (NaHCO3), also known as baking soda.
Upvote In the industrial production of which of the following, molecular hydrogen is obtained as a by product?
In the industrial production of which of the following, molecular hydrogen is obtained as a by product?
NaOH is obtained by electrolysis of NaCl. Solution of NaCl using Hg cathode
Upvote Metals generally melt at very high temperature. Amongst the following, the metal with the highest melting point will be
Metals generally melt at very high temperature. Amongst the following, the metal with the highest melting point will be
Which one of the following elemental forms is not present in the enamel of the teeth?
Which one of the following elemental forms is not present in the enamel of the teeth?
Enamel has calcium hydroxyl apatite [Ca10 (PO4)6 (OH)2], CaCO3, CaF2 and Mg3 (PO4)2
Ca2+, P5+ and F- are present
Upvote NF3 is stable due to high N-F bond energy.
Other halides of nitrogen (NCl3 NBr3, Nl3) are explosive
Upvote Identify the correct statement from B2H6 from those given below :
(A) In B2H6, all B-H bonds are equivalent
(B) In B2H6, there are four 3-centre 2- electron bonds
(C) B2H6 is a Lewis acid
(D) B2H6 can be synthesized from both BF3 and NaBH4.
(E) B2H6 is planar molecule.
Choose the most appropriate answer from the options given below :
Identify the correct statement from B2H6 from those given below :
(A) In B2H6, all B-H bonds are equivalent
(B) In B2H6, there are four 3-centre 2- electron bonds
(C) B2H6 is a Lewis acid
(D) B2H6 can be synthesized from both BF3 and NaBH4.
(E) B2H6 is planar molecule.
Choose the most appropriate answer from the options given below :
B2H6 has 4 2 c -2e bonds and 2 3c-2e bonds.
Bridging (B-H) bonds have more value of bond- length then terminal (B – H) bonds
Bridging bonds are in one plane, but terminal bonds are in perpendicular plane.
Due to presence of (3c-2e) bonds, it behaves as electrons deficient and prone to get attached by l
Upvote Which of the following statements are correct?
(A) Both LiCl and MgCl2 are soluble in ethanol
(B) The oxides Li2O and MgO combine with excess of oxygen to give superoxide.
(C) LiF is less soluble in water than other alkali metal fluorides.
(D) Li2O is more soluble in water than other alkali metal oxides.
Choose the most appropriate answer from the options given below :
Which of the following statements are correct?
(A) Both LiCl and MgCl2 are soluble in ethanol
(B) The oxides Li2O and MgO combine with excess of oxygen to give superoxide.
(C) LiF is less soluble in water than other alkali metal fluorides.
(D) Li2O is more soluble in water than other alkali metal oxides.
Choose the most appropriate answer from the options given below :
Due to higher extent of polarization by Li+ and Mg2+, LiCl and Mgcl2 have covalent character. Therefore they are soluble in ethanol.
Due to very high value of lattice energy, LiF is having very less solubility in water.
Upvote The highest industrial consumption of molecular hydrogen is to produce compounds of element :
The highest industrial consumption of molecular hydrogen is to produce compounds of element :
The highest industrial consumption of hydrogen gas is in the synthesis of ammonia gas (Having use in manufacturing of N-based fertizers)
Upvote Given below are the oxides :
Na2O, As2O3, N2O, NO and Cl2O7
Number of amphoteric oxides is :
Given below are the oxides :
Na2O, As2O3, N2O, NO and Cl2O7
Number of amphoteric oxides is :
Acidic oxide => Cl2O7
Neutral oxide => N2O, NO
Basic oxide => Na2O
Amphoteric oxide => As2O3
Upvote