p-Block Elements-II Book Back Practice Test

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

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In which of the following, \(NH_3\) is not used?

A.Nessler's reagent B.Reagent for analysis of \(Cu^{2+}\) ions C.Manufacture of fertilizers D.Tollen's reagent

Which is true regarding nitrogen?

A.least electronegative element B.has low ionisation enthalpy than oxygen C.d- orbitals available D.ability to form \(p\pi-p\pi\) bonds with itself

An element belongs to group 15 and 3rd period of the periodic table, its electronic configuration would be

A.\(1s^2 2s^2 2p^4\) B.\(1s^2 2s^2 2p^3\) C.\(1s^2 2s^2 2p^6 3s^2 3p^2\) D.\(1s^2 2s^2 2p^6 3s^2 3p^3\)

Solid (A) reacts with strong aqueous NaOH liberating a foul smelling gas(B) which spontaneously burn in air giving smoky rings. A and B are respectively

A.\(P_4\) (red) and \(PH_3\) B.\(P_4\) (white) and \(PH_3\) C.\(S_8\) and \(H_2S\) D.\(P_4\) (white) and \(P_2H_4\)

On heating with concentrated NaOH solution in an inert atmosphere of \(CO_2\), white phosphorus gives a gas (B) and a compound (C). The oxidation state of phosphorus in (B) and (C) respectively are

A.-3, +1 B.+3, +1 C.+1, +1 D.-3, -3

Which of the following is the strongest acid?

A.\(H_3PO_2\) B.\(H_3PO_3\) C.\(H_3PO_4\) D.\(H_4P_2O_7\)

Which of the following is correct for \(P_4\) molecule of white phosphorus?

A.It contains 6 P-P single bonds B.It contains 4 P-P single bonds C.It contains 4 lone pairs of electrons D.It has a planar structure

Which of the following noble gas is used in magnetic resonance imaging (MRI) systems?

A.Helium B.Neon C.Argon D.Krypton

In the case of nitrogen, \(NCl_3\) is possible but not \(NCl_5\) while in case of phosphorus, \(PCl_3\) as well as \(PCl_5\) are possible. It is due to

A.Availability of vacant d orbitals in P but not in N B.Lower electronegativity of P than N C.Lower ionisation energy of P than N D.all of these

Q10

The basicity of pyrophosphoric acid (\(H_4P_2O_7\)) is

A.2 B.4 C.3 D.5

Q11

The molarity of given orthophosphoric acid is 2M. Its normality is

A.2N B.6N C.4N D.0.6N

Q12

Assertion: \(PCl_5\) is ionic in solid state. Reason: In solid state, it exists as \([PCl_4]^+\) and \([PCl_6]^-\).

A.Both A and R are true and R is not the correct explanation B.A is true but R is false C.Both A and R are false D.Both A and R are true and R is the correct explanation

Q13

Which of the following is the correct order of increasing oxidizing power?

A.\(F_2 < Cl_2 < Br_2 < I_2\) B.\(F_2 > Cl_2 > Br_2 > I_2\) C.\(Cl_2 < Br_2 < F_2 < I_2\) D.\(I_2 < Br_2 < Cl_2 < F_2\)

Q14

The magnetic property of the oxygen molecule is

A.diamagnetic B.ferromagnetic C.paramagnetic D.ferrimagnetic

Q15

Which of the following statement is true for the structure of ozone?

A.\(O-O\) bond lengths are equal B.it is linear C.\(O-O-O\) bond angle is \(120^\circ\) D.none of these

Q16

The correct order of the thermal stability of hydrogen halides is

A.\(HI > HBr > HCl > HF\) B.\(HF > HCl > HBr > HI\) C.\(HCl > HF > HBr > HI\) D.\(HI < HBr < HCl < HF\)

Q17

Which of the following is the strongest oxidizing agent?

A.\(Cl_2\) B.\(Br_2\) C.\(I_2\) D.\(F_2\)

Q18

In which of the following compounds, the oxidation state of oxygen is +2?

A.\(H_2O_2\) B.\(O_2F_2\) C.\(OF_2\) D.\(H_2O\)

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About this p-Block Elements-II test

This free online practice test covers p-Block Elements-II 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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