p-Block Elements-I Book Back Practice Test

12th Standard Chemistry — p-Block Elements-I: Book Back Online Practice Test

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An aqueous solution of borax is

A.neutral B.acidic C.basic D.amphoteric

Boric acid is an acid because its molecule (NEET)

A.contains replaceable \(H^{+}\) ion B.gives up a proton C.combines with proton to form water molecule D.accepts \(OH^{-}\) from water, releasing proton

Which among the following is not a borane?

A.\(B_{2}H_{6}\) B.\(B_{3}H_{6}\) C.\(B_{4}H_{10}\) D.none of these

Which of the following metals has the largest abundance in the earth’s crust?

A.Aluminium B.Calcium C.Magnesium D.Sodium

In diborane, the number of electrons that accounts for banana bonds is

A.six B.two C.four D.three

The element that does not show catenation among the following p-block elements is

A.Carbon B.silicon C.Lead D.germanium

Carbon atoms in fullerene with formula \(C_{60}\) have

A.\(sp^{3}\) hybridised B.\(sp\) hybridised C.\(sp^{2}\) hybridised D.partially \(sp^{2}\) and partially \(sp^{3}\) hybridised

Oxidation state of carbon in its hydrides

A.+4 B.-4 C.+3 D.+2

The basic structural unit of silicates is (NEET)

A.\(SiO_{3}^{2-}\) B.\(SiO_{4}^{2-}\) C.\(SiO^{-}\) D.\(SiO_{4}^{4-}\)

Q10

The repeating unit in silicone is

A.SiO2 B.

Structural diagrams representing different potential chemical repeating units for a silicone polymer chain., choice B

Structural diagrams representing different potential chemical repeating units for a silicone polymer chain., choice C

Structural diagrams representing different potential chemical repeating units for a silicone polymer chain., choice D

Q11

Which of these is not a monomer for a high molecular mass silicone polymer?

A.\(Me_{3}SiCl\) B.\(PhSiCl_{3}\) C.\(MeSiCl_{3}\) D.\(Me_{2}SiCl_{2}\)

Q12

Which of the following is not \(sp^{2}\) hybridised?

A.Graphite B.graphene C.Fullerene D.dry ice

Q13

The geometry at which carbon atom in diamond are bonded to each other is

A.Tetrahedral B.hexagonal C.Octahedral D.none of these

Q14

Which of the following statements is not correct?

A.Beryl is a cyclic silicate B.\(Mg_{2}SiO_{4}\) is an orthosilicate C.\(SiO_{4}^{4-}\) is the basic structural unit of silicates D.Feldspar is not aluminosilicate

Q15

Match items in column - I with the items of column – II and assign the correct code. Column-I: A. Borazole B. Boric acid C. Quartz D. Borax Column-II: 1. \(B(OH)_{3}\) 2. \(B_{3}N_{3}H_{6}\) 3. \(Na_{2}[B_{4}O_{5}(OH)_{4}] \cdot 8H_{2}O\) 4. \(SiO_{2}\)

A.A-2, B-1, C-4, D-3 B.A-1, B-2, C-4, D-3 C.A-1, B-2, C-4, D-3 D.None of these

Q16

Duralumin is an alloy of

A.Cu, Mn B.Cu, Al, Mg C.Al, Mn D.Al, Cu, Mn, Mg

Q17

The compound that is used in nuclear reactors as protective shields and control rods is

A.Metal borides B.metal oxides C.Metal carbonates D.metal carbide

Q18

The stability of +1 oxidation state increases in the sequence

A.Al < Ga < In < Tl B.Tl < In < Ga < Al C.In < Tl < Ga < Al D.Ga < In < Al < Tl

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This free online practice test covers p-Block Elements-I from the 12th Standard Chemistry (Samacheer Kalvi) syllabus. Choose the number of questions and an optional time limit, then answer and submit — everything is checked in your browser, with the correct answers and a worked explanation shown at the end. For the full solutions to every question in this set, see the solved MCQs page.

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