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Metals and Non - Metals / Chemical Bonding

Description: Chemistry Alkaline Earth MetalsAlkaline Earth MetalsGroup 13 ElementsGroup 13 Elements: The Boron FamilyGroup 14 ElementsGroup 14 Elements: The Carbon FamilyTransition ElementsImportant Compounds of Transition ElementsGroup 17 ElementsGroup 17 Elements
Number of Questions: 15
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Tags: Chemistry Alkaline Earth Metals Group 13 Elements Group 13 Elements: The Boron Family Group 14 Elements Group 14 Elements: The Carbon Family Transition Elements Important Compounds of Transition Elements Group 17 Elements
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Which of the following alkaline earth metals has the lowest relative abundance in the earth’s crust?

  1. Be

  2. Mg

  3. Ca

  4. Sr

  5. Ba

Show answer
Correct Option: C
Explanation:

Ca has 5% relative abundance among the alkaline earth metals. Hence, Ca has the lowest relative abundance among the alkaline earth metals in the earth’s crust.

Which of the following alkaline earth metals gives scarlet colour on flame test?

  1. Be

  2. Mg

  3. Ca

  4. Sr

  5. Ba

Show answer
Correct Option: D
Explanation:

Sr gives scarlet colour on flame test.

Electronic configurations of some elements are given below. Which element has the lowest first IE?

  1. [He] 2s2

  2. [Ne] 3s2

  3. [Ar] 4s2

  4. [Xe] 6s2

  5. [Rn] 7s2

Show answer
Correct Option: D
Explanation:

The electronic configuration [Xe] 6s2 is of Ba (503 KJ Mol-1) and represents the lowest ionisation energy.

Which transition metal ion has the maximum number of unpaired electrons?

  1. Ti3+

  2. V3+

  3. Cr3+

  4. Cr2+

  5. Mn2+

Show answer
Correct Option: E
Explanation:

Mn2+ has 5 unpaired electrons.

Which of the following is an incorrect statement regarding alkaline earth metals?

  1. Be is amphoteric.

  2. All alkaline earth metals react with cold water and evolve hydrogen.

  3. Mg and Be form organometallic compounds.

  4. Carbonates and oxalates of alkaline earth metals are insoluble in water.

  5. The standard potential of Be is more than Ca.

Show answer
Correct Option: B
Explanation:

Be does not reacts with cold water. It reacts with steam, Mg reacts with hot water whereas Ca, Sr and Ba react rapidly with cold water to give hydrogen.

Which of the following pairs possesses salt-like carbides only?

  1. Be2C, Al4C3

  2. V2C, Fe3C

  3. SiC, B4C

  4. V4C3, Fe3C

  5. V4C3, Al4C3

Show answer
Correct Option: A
Explanation:

Salt-like carbides are depending on whether the structure contains C, C2 or C3 anions, i.e.,- Be2C, Al4C3, MgC2, etc. Hence, both Be2C, Al4C3 are salt-like carbides.

Which of the following statements about halogens is not correct?

  1. Chlorine has greater X-X bond dissociation energy than bromine.

  2. In NaClO4 molecule, chlorine shows +7 oxidation state.

  3. ClO2 molecule is diamagnetic.

  4. Chile saltpetre is a mineral of iodine.

  5. Halogens are strong oxidising agents.

Show answer
Correct Option: C
Explanation:

ClO2 molecule is paramagnetic in nature due to the presence of one unpaired electron.

Which of the following drugs is used as antihistamine as well as antacid agent?

  1. Ciproheptadine

  2. Equanil

  3. Ranitidine

  4. Dexamethasone

  5. Betamethasone

Show answer
Correct Option: C
Explanation:

Ranitidine is used as an antihistamine agent as well as an antacid.

Faraday’s law of electrolysis is related to the ______.

  1. atomic number of anion of the electrolyte

  2. atomic number of cation of the electrolyte

  3. speed of the anion of the electrolyte

  4. speed of the cation of the electrolyte

  5. equivalent weight of the electrolyte

Show answer
Correct Option: E
Explanation:

Faraday’s law of electrolysis is related to the equivalent weight of electrolyte as “the number of Faraday’s passed is equal to the number of gram equivalent of electrolytes discharged”.

Which of the following oxoacids of sulphur possess +6 oxidation state with dibasic nature?

  1. Sulphurous acid

  2. Oil of vitriol

  3. Caro’s acid

  4. Marshall’s acid

  5. None of these

Show answer
Correct Option: B
Explanation:

Oil of vitriol or sulphuric acid (H2SO4) has +6 oxidation state and dibasic nature as it has 2 replaceable hydrogen atoms.

Which of the following statements is incorrect?

  1. The first ionization potential of Al is less than the first ionization potential of Mg.

  2. The second ionization potential of Mg is greater than the second ionization potential of K.

  3. Na has higher value of first ionization potential than Mg.

  4. Mg2+ has zero unpaired electron.

  5. Magnesium hydroxide is used as antacid.

Show answer
Correct Option: B
Explanation:

Mg+ requires less energy for further ionization than K+ due to noble gas configuration.

Select the correct opinion for nido-boranes using the boranes given below: (i) B5H9

(ii) B4H10

(iii) B5H11

(iv) B6H12

(v) B6H10

(vi) B8H12

  1. i, ii and iv

  2. ii, iii and vi

  3. i, ii and v

  4. ii, iii and iv

  5. i, v and vi

Show answer
Correct Option: E
Explanation:

The structural formula for nido-borane is BnHn+4 and the structural formula for arachno-borane is BnHn+6. B5H9 is nido-borane. B4H10 is arachno-borane. B5H11 is arachno-borane. B6H12 is arachno-borane. B6H10 is nido-borane. B8H12 is nido-borane. Hence, i, v and  vi are nido-boranes.

Which of the following electrolytes is the most effective coagulating agent for Sb2S3?

  1. Al2(SO4)3

  2. Si(NO3)4

  3. BaCl2

  4. CaSO4

  5. MgCl2

Show answer
Correct Option: B
Explanation:

Since, Sb2S3 is an anionic sol. According to Hardy Schulze rule, greater the valency of cationic coagulating agent, greater its coagulating power. Therefore, Si(NO3)4 has most valency (+4), and hence it will be the most effective coagulation agent in the present case.

Select the correct answer for identical bond order using the codes given below: (i) CN- (ii) O2-
(iii) NO+ (iv) CN+ (v) O22+

  1. i and ii

  2. i and v

  3. i, iii and iv

  4. i, ii and v

  5. i, iii and v

Show answer
Correct Option: E
Explanation:

Molecules/ions which have the same number of electrons also have identical bond order. CN- has 14 electrons and bond order of 3. O2- has 17 electrons and bond order of 1.5. NO+ has 14 electrons and bond order of 3. CN+ has 12 electrons and bond order of 2.5. O22+ has 14 electrons and bond order of 3. Hence, i, iii and v all have identical bond order of 3.

Which of the following ligands is present in the uranocene?

  1. C5H52-

  2. C8H82-

  3. C4H42-

  4. C6H6

  5. C2H22-

Show answer
Correct Option: B
Explanation:

Since uranocene is U(C8H8)2.  Hence, the ligand C8H82- is present in uranocene.

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