chemistry: exp. Test 2023

written by gogorabei | June 19, 2023

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#1. 11)When a piece of Zinc is added to diluted sulphuric acid then the evolved gas is passed in four solutions at the suitable conditions. Which of one of the following processes occurs?

a)YSO4 >>> Y2(SO4)3

a)YSO4 >>> Y2(SO4)3

b)W Cl >>> WCl2

b)W Cl >>> WCl2

c)X2(SO4)3 >>> XSO4

c)X2(SO4)3 >>> XSO4

d)ZCl2 >>> ZCl3

d)ZCl2 >>> ZCl3

#2. 13) 0.125 mol from hot conc. Sulphuric acid reacts with excess sodium nitrate. The produced nitric acid is neutralized with 200 ml of sodium hydroxide , So the concentration of sodium hydroxide equals ………. If [Molar mass of HNO3 = 63 g/ mol , H2SO4= 98 g/mol ]

a) 6.25 M

a) 6.25 M

b) 0.12 M

b) 0.12 M

c) 0.625 M

c) 0.625 M

d)1.25 M

d)1.25 M

#3. 14)Which one of the following represents a complete reaction …………

a)CH3COOH(aq) + NH4OH(aq) =CH3COONH4 (aq) + H2O(ℓ)

a)CH3COOH(aq) + NH4OH(aq) =CH3COONH4 (aq) + H2O(ℓ)

b)HCOOH(aq) + H2O(ℓ) = HCOO - (aq) + H3O+(aq)

b)HCOOH(aq) + H2O(ℓ) = HCOO - (aq) + H3O+(aq)

c)Ag Br(s) = Ag+ (aq) + Br- (aq)

c)Ag Br(s) = Ag+ (aq) + Br- (aq)

d) N2(g) + O2(g) = 2NO(g)

d) N2(g) + O2(g) = 2NO(g)