Which of the following statements is not valid for oxoacids of phosphorus?

(a) Orthophosphoric acid s used in the manufacture of triple superphosphate

(b) Hypophosphorus acid is a diprotic acid

(c) All oxoacids contain tetrahedral four coordinated phosphorus

(d) All oxoacids contain at least one P=O unit and one P-OH group

Concept Questions :-

group 15 ,preparation and properties
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Sulphur trioxide can be obtained by which of the following reaction

(a) CaSO4 + C                          (b) Fe2(SO4)3

(c) S + H2SO4                          (d) H2SO4 + PCl5 

Concept Questions :-

group 16,preparation and properties
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Among the following which is the strongest oxidising agent ?
(a) F2
(b) Br2
(c) I2
(d) Cl2

Concept Questions :-

group 17 ,preparation and properties
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The reaction of hydrogen and iodine monochloride is given as :

H2(g)+ 2ICl(g)  2HCl(g)+ I2(g)

This reaction is of first order with respect to H2(g) and 2ICl(g) following mechanisms were proposed:

Mechanism A:

H2(g)+ 2ICl(g)  2HCl(g)+ I2(g)

Mechanism B :

H2(g)+ ICl(g) HCl(g)+ HI(g) ; slow

HI(g)+ ICl(g)  HClCg) + I2(g); fast

Which of the above mechanism (s) can be consistent with the given information about the reaction ?

(a) B only

(b) A and B both

(c) Neither A nor B

(d) A only

Concept Questions :-

Interhalogen Compounds
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from

(a) zero to +1 and zero to -5
(b) zero to -1 and zero to +5
(c) zero to -1 and zero to +3
(d) zero to +1 and zero to -3

 

Concept Questions :-

group 17 ,preparation and properties
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Roasting of sulphides gives the gas X as a by-product. This is a colourless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic acts as a reducing agent and its acid has never been isolated. The gas X is

(a) H2S

(b) SO2

(c) CO2

(d) SO3

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Acidity of diprotic acids in aqueous solutions increases in the order:-

(a) H2S<H2Se<H2Te
(b) H2Se<H2S<H2Te
(c) H2Te<H2S<H2Se
(d) H2Se<H2Te<H2S

Concept Questions :-

group 15 ,preparation and properties
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


Strong reducing behaviour of H3PO2 is due to
(a) presence of one-OH group and two P-H bonds
(b) high electron gain enthalpy of phosphorus
(c) high oxidation state of phosphorus
(d) presence of two-OH groups and one P-H bond

Concept Questions :-

group 15 ,preparation and properties
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


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
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


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
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level: