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

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Questions
1 Which of following after reacting with KI do not remove Iodine
A CaSO4
B K2Cr2O7
C HNO3
D HCl

Answer:HCl
2 Aqueous solution of which of following acid can not be kept in bottle of glass
A HF
B HCl
C HBr
D HI

Answer:HF
3 Which of following pair is not correctly matched
A Halogen which is liquid at room temp. - Bromine
B Most electronegative element - Fluorine
C Most reactive halogen - Flouorine
D The Strorgest oxidizing halogen - Iodine

Answer: The Strorgest oxidizing halogen - Iodine
4 Mark element that shows oxidation state only one
A F
B Cl
C Br
D I

Answer:F
5 Which of following has lowest boiling point
A HF
B HCl
C HBr
D HI

Answer: HCl
6 Fluorine is stronger oxidizing agent than chlorine in aqueous solution. This is attributed to many factors except.
A Heat of dissociation
B e-affinity
C Heat of Hydration
D Ionisation Potential

Answer:e-affinity
7 Mark the element that displaces 3 halogens from their compound
A F
B Cl
C Br
D I

Answer:F
8 Mark smallest atom
A F
B Si
C Ge
D pb

Answer:F
9 Which of following arrangement for 3 halogens Cl, Br, I when placed in order of increasing e-affinity
A Cl, Br, I
B I, Br, Cl
C Br, Cl, I
D I, Cl, Br

Answer:I, Br, Cl
10 Fluorine is better oxidizing agent than Br2 , It is due to
A small size of F
B More e - repulsion in F
C More e– neg. in F
D Non - Metallic nature of F

Answer:More e– neg. in F
11 Which statement is correct about halogens?
A They are all diatomic
B They are forming universal solvents
C They can mutually displace each other from solution of their compound with metals
D None of above

Answer:They can mutually displace each other from solution of their compound with metals
12 Which of following is most basic?
A I
B Br
C Cl
D F

Answer: I
13 Which of following is not a green house gas?
A CO2
B CH4
C O3
D N2X

Answer:N2X
14 Inisolation of F., a number of difficulties were encounted. Which statement is correct?
A Potential required for discharge of F. ions is the lowest
B F. reacts with most glass vessel
C F has great affinity for H
D Electrolysis of aqueous HF gives ozonised O2

Answer: Electrolysis of aqueous HF gives ozonised O2
15 Chlorin gas is dried over
A CaO
B NaOH
C KOH
D Conc. H2SO4

Answer:Conc. H2SO4
16 Chlorine is used in water for
A Killing germs
B Prevention of pollution
C Cleansing
D Removing dirt

Answer: Killing germs
17 Chlorine can not be used
A As bleaching agent
B Sterilisation
C Preparation of antiseptic
D Extraction of silver & copper

Answer: Extraction of silver & copper
18 Euchlorine is mixture of
A Cl2 & SO2
B Cl2 & ClO2
C Cl2 & CO
D None of these

Answer:Cl2 & ClO2
19 Which two salts are used in preparing iodised salt.
A KIO3 & I2
B KI & I2
C KIO3 & HI
D HI & KI

Answer: KI & I2
20 Type of bonding in HCl is
A Pure Covalent
B Polar Covalent
C Highly Covalent
D H - bonding

Answer: Polar Covalent

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