12 Chemistry Usp 11 p Block Test
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CHEMISTRYCHEMISTRYCHEMISTRYCHEMISTRY (A.K DIGGAL)(A.K DIGGAL)(A.K DIGGAL)(A.K DIGGAL)
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THCLASS TEST PAPER (I) M.M-20
P-block element part-1
Q.1 Though nitrogen exhibits +5 oxidation state, it does not form pentahalide. Give reason. 1 Q.2 PH3 has lower boiling point than NH3.Why? 1
Q.3 Write the reaction of thermal decomposition of sodium azide. 1
Q.4 How does ammonia react with a solution of Cu2+? 1 Q.5 Give the resonating structures of NO2 and N2O5. 1
Q.6 Give the structures, basicity & oxidation state of the following species 3
(a)
H3PO4 (b) H4P2O7 (C) H3PO2 Q.7 Complete the following reaction 6
(a) --------- + 2H2O + H3PO2 4Ag + 4HNO3 + ---------
(b) 3CuSO4 + 2PH3 ----- ------- + ---------
(c) P4 + 3NaOH + 3H2O ------- + ----------- (d) I2 + 10HNO3 -------- + --------- + 4H2O
(e) --------- + ------------- [Cu (NH3)4]2+ (f) CH3COOH + PCl3 --------- + ---------- Q.8 How is ammonia manufactured industrially? 2 Q.9 Why does the reactivity of nitrogen differ from phosphorus? 2 Q.10 In what way can it be proved that PH3 is basic in nature? 2
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CHEMISTRYCHEMISTRYCHEMISTRYCHEMISTRY (A.K DIGGAL)(A.K DIGGAL)(A.K DIGGAL)(A.K DIGGAL)
9897400323989740032398974003239897400323,8923552791,8923552791,8923552791,8923552791 12
THCLASS TEST PAPER (I) M.M-20
P-block element part-2
Q.1 H2S is less acidic than H2Te. Why? 1
Q.2 Write the order of thermal stability of the hydrides of Group 16 elements. 1
Q.3 Why does O3 act as a powerful oxidising agent? 1
Q.4 Which form of sulphur shows paramagnetic behavior? 1
Q.5 Why is Ka2 Ka1 for H2SO4 in water? 1
Q.6 Draw the structure of following: - 3 (a) H2 S2O8 (b) H2 S2O7 (c) H2SO3
Q.7 Complete the following reaction 6
(a) Cu + 2 H2SO4(conc.) >>>> .......... + .. + (b) 2NaOH + SO2 >>>> + . (c) C12H22O11 >>>> 12C + 11H2O (d) PbS(s) + 4O3(g) > + .. (e) SO3 + H2SO4 > ............... (f) 4FeS2 + 11O2 > ............ + ................................................
Q.8 What is difference b/w sulphur & - sulphur? 2 Q.9 How is sulphuric acid manufactured industrially? 2 Q.10 Comment on the nature of two SO bonds formed in SO2 molecule. Are the two SO bonds in this molecule equal? 2
