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

Questions
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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