Hot concentrated sulphuric acid is a moderately strong oxidising agent. Which of the following reaction doe not show oxidising behaviour?

(a) Cu + 2H2SO4 CuSO4 + SO2 + 2H2O

(b) 3S + 2H2SO4 3SO2 + 2H2O

(c) C + 2H2SO4 CO2 + 2SO2 + 2H2O

(d) CaF2 + H2SO4 CaSO4 + 2HF

Concept Questions :-

group 16,preparation and properties
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Among the following, which one is a wrong statement?

(a) PH5 and BiCl5 do not exist
(b) ρp-dp bonds are present in SO2
(c) SeF4 and CH4 have same shape
(d) I3+ has bent geometry

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group 17 ,preparation and properties
group 15 ,preparation and properties
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When copper is heated with conc. HNO3 it produces
(a) Cu(NO3)2 and NO       (b)Cu(NO3)2,NO and NO2
(c)Cu(NO3)2 and N2O       (d) Cu(NO3)2 and NO2

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group 15 ,preparation and properties
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Match the compounds given in column I with the hybridisation and shape given in column II and mark the correct option.

Column I     Column II
A. XeF6        1. Distorted octahedral
B. XeO      2. Square planar
C. XeOF    3. Pyramidal
D. XeF4       4. Square pyramidal

Codes
A B C D
(a) 1 2 4 3
(b) 4 3 1 2
(c) 4 1 2 3
(d) 1 3 4 2

Concept Questions :-

group 18,perparation and properties
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Which is the correct statement for the given acids?
(a) Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid
(b) Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid
(c) Both are triprotic acids
(d) Both are diprotic acids

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group 15 ,preparation and properties
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The product obtained as a result of a reaction of nitrogen with CaC2 is:

(a) CaCN          (b) CaCN3

(c) Ca2CN        (d) CaCN2

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group 15 ,preparation and properties
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Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is shown by one of these compounds. but not by the other?

(a) Forms acid-rain
(b) Is a reducing agent
(c) Is soluble in water
(d) ls used as a food-preservative

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group 15 ,preparation and properties
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Maximum bond angle at nitrogen is present in which of the following?

(a) NO2
(b) NO2-
(c) NO2+
(d) NO3-

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group 15 ,preparation and properties
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Which of the statements given below is incorrect?

(a) Cl2O7 is an anhydride of perchloric acid

(b) O3 molecule is bent

(c) ONF is isoelectronic with Anionic NO2

(d) OF2 is an oxide of fluorine

Concept Questions :-

group 17 ,preparation and properties
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The variation of the boiling point of the hydrogen halides is in the order HF > HI > HBr > HCl. What explains the higher boiling point of hydrogen fluoride?

(a) The electronegativity of fluorine is much higher than for other elements in the group

(b) There is strong hydrogen bonding between HF molecules

(c) The bond energy ol HF molecules is greater than in other hydrogen halides

(d) The effect of nuclear shielding is much reduced in fluorine which polarises the HF molecule

Concept Questions :-

group 17 ,preparation and properties
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