TN State Board Samacheer Kalvi Online Test for 11th Std - Chemistry - English - p-Block Elements – II

Question 1 Of 10

The molarity of given orthophosphoric acid solution is 2M. Its normality is

6N 4N 2N none of these

Question 2 Of 10

The basicity of pyrophosphorous acid (H4P2O3) is

4 2 3 5

Question 3 Of 10

Assertion : bond dissociation energy of fluorine is greater than chlorine gas

Both assertion and reason are true and reason is the correct explanation of assertion. Both assertion and reason are true bu t reason is not the correct explanation of assertion Assertion is true bu t reason is false Both assertion and reason are false

Question 4 Of 10

P4O6 reacts with cold water to give

H3PO3 H4P2O7 HPO3 H3PO4

Question 5 Of 10

The correct order of the thermal stability of hydrogen halide is (PTA – 4)

Hl > HBr > HCl > HF HF > HCl > HBr > HI HCl > HF > HBr > HI HI > HCl > HF > HBr

Question 6 Of 10

Among the following, which is the strongest oxidizing agent?

Cl2 F2 Br2 l2

Question 7 Of 10

Solid (A) reacts with strong aqueous NaOH liberating a foul smelling gas(B) which spontaneously burn in air giving smoky rings. A and B are respectively

P4(red) and PH3 P4 (white) and PH3 S8 and H2S P4(white) and H2S

Question 8 Of 10

Which is true regarding nitrogen?

least electronegative element has low ionisation enthalpy than oxygen d – orbitals available ability to form pπ -pπ bonds with itself

Question 9 Of 10

On hydrolysis, PCl3 gives

H3PO3 PH3 H3PO4 POCl3

Question 10 Of 10

In which of the following, NH3 is not used?

Nessler’s reagent Reagent for the analysis of IV group basic radical Reagent for the analysis of III group basic radical Tollen’s reagent

Tamil Nadu State Board ( Samacheer Kalvi ) Online Test based on Book Back Questions - 11th Standard Chemistry - English Medium - p-Block Elements – II

Samacheer Kalvi 11th Chemistry - p-Block Elements – II - Book Back Questions in English Medium