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Class 12 Chemistry Chapter 7 p Block Elements MCQs | Class 12 Chemistry Chapter 7 p Block Elements Multiple Choice Questions (MCQs) with Answers

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Free download in PDF Class 12 Chemistry Chapter 7 p Block Elements Multiple Choice Questions (MCQs) with Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries./p>

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(1) SiF4 gets hydrolysed gives
[A] SiO2
[B] Si(OH)2F2
[C] H2SiF6
[D] Si(OH)4
Answer: Si(OH)4
(2) Which of the following statements is incorrect
[A] Silicon is extensively used as a semiconductor
[B] Carborandum is SiC
[C] Silicon occurs in free state in nature
[D] Mica contains the element silicon
Answer: Silicon occurs in free state in nature
(3) Silicon is an important constituent of
[A] Rocks
[B] Amalgams
[C] Chlorophyll
[D] Haemoglobin
Answer: Rocks
(4) The number of unpaired electrons in carbon atom is
[A] 1
[B] 2
[C] 3
[D] 4
Answer: 2
(5) Colour is imparted to glass by mixing
[A] Synthetic gas
[B] Metal oxide
[C] Oxide of non - metal
[D] Coloured Salt
Answer: Metal oxide
(6) Which of the following glass is used in making wind screen of automobiles.
[A] Crook's Glass
[B] Jena Glass
[C] Safety Glass
[D] Pyrex Glass
Answer: Safety Glass
(7) Which of the following is insoluble in water
[A] Na2CO3
[B] CaCO3
[C] ZnCO3
[D] Al2(CO3)3
Answer: Al2(CO3)3
(8) In which of the following the inert pair effect is most prominent
[A] C
[B] Si
[C] Ge
[D] pb
Answer: pb
(9) Plumbosoluancy implies dissolution of lead in
[A] Bases
[B] Acids
[C] Ordinary Water
[D] CuSO4
Answer: Ordinary Water
(10) Which of the following glass is used to make lenses and prisms
[A] Flint
[B] Jena
[C] Pyrex
[D] Quartz
Answer: Flint
(11) N2 gas is absorbed by
[A] Calcium hydroxide
[B] Ferrous sulphate
[C] Calcium Carbide
[D] Aluminium Carbide
Answer: Calcium Carbide
(12) White lead is
[A] PbCO3
[B] PbCO3. PbO
[C] 2PbCO3.Pb(OH)2
[D] 2PbSO4. PbO
Answer: 2PbCO3.Pb(OH)2
(13) Red lead is
[A] Pb3O4
[B] PbO
[C] PbO2
[D] Pb4O3
Answer: Pb3O4
(14) Name of the structure of silicates in which three oxygen atoms of [SiO4]4– are shared is
[A] pyrosilicate
[B] Sheet Silicate
[C] Linear chain Silicates
[D] Three dimensional Silicate
Answer: Three dimensional Silicate
(15) A metal used in storage battries is
[A] Copper
[B] Lead
[C] Tin
[D] Nickel
Answer: Lead
(16) Solder is an alloys of
[A] Pb+Zn+Sn
[B] Pb+Zn
[C] Pb+Sn
[D] Sn+Zn
Answer: Pb+Sn
(17) Which of the following statement is correct with respect ot the property of elements in the carbon Family with an increase in atomic number their.
[A] Atomic size decreases
[B] Ionization energy increases
[C] Metallic character decreases
[D] Stability of +2 oxidation state increases
Answer: Stability of +2 oxidation state increases
(18) Lapis lazuli is
[A] Ferrous sulphate
[B] Copper Sulphate
[C] Sodium Alumino Silicate
[D] Zinc Sulphate
Answer: Sodium Alumino Silicate
(19) 'Lead pencil' contains
[A] PbS
[B] Graphite
[C] FeS
[D] Pb
Answer: Graphite
(20) Diamond is harder than graphite because
[A] Graphite is planar
[B] Diamond has free electron
[C] Graphite is sp3 hybridized
[D] None
Answer: Diamond has free electron

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