Chemistry

CHEMISTRY PART TEST - 1
1.The brown ring conglomerate compound is formulated as [Fe(H2O)5(NO)]SO4. The oxidation state of straighten out is:
(A)1(B)2
(C)3(D)0

2.The equivalent weight of MnSO4 is half its molecular weight when it is converted to:
(A)Mn2O3(B)MnO2
(C)MnO4(D)MnO42

3.A example of tap pissing contains 366 ppm of HCO3( ions with Ca+2 ion. Now it is removed by Clarks method by addition of Ca(OH)2. Then what minimum mound of Ca(OH)2 will be required to remove HCO3- ions completely from viosterol g of same tap water sample
(A) 1 g(B)0.4g
(C) 0.222 g (D) 0.111 g

4.55 g Ba(MnO4)2 sample containing inert impurity is completely reacting with 100 mL of 56 vol strength of H2O2, then(prenominal) what will be the section purity of Ba(MnO4)2 in the sample ? (Ba 137, Mn 55)
(A) 40%(B)25%
(C) 10%(D) 68.18%

5.An aqueous firmness of purpose of 0.57 g of KIO3 (formula weight = 214) reacts with excess of KI in carriage of HCl, where both converts into I2. The liberated I2 consumes certain volume of (0.1 M) Na2S2O3, in staple fiber medium where it converts into SO42-, then find out the volume of Na2S2O3 (in mL) unavoidable to reach the equivalence point.
(A) 19.97(B)29.97
(C) 24(D) 35

6.



The labeling on a store of H2O2 solution is 20 vol, then the concentration of
H2O2 in percentage strength will be:
(A) 3.03 %(B)5%
(C) 4.55%(D) 6.06 %

7.CIF3 (molecular weight, M1) can oxidize UF4 (molecular weight, M2) UF6 and get reduced to Cl2 itself. Equivalent weights of CIF3 and UF4 respectively in this chemical reaction are

(A)M2/2, M1/6(B)M1/3, M2/2

(C)M1/6, M2/2(D)M1/6, M2/6

8.In redox reaction, H2O2 oxidises K4[Fe(CN)6) into K+, Fe+3, CO3-2 and NO3- ions in acidic medium, than how many moles of H2O2 will react with 1 mole of K4[Fe(CN)6]

(A) 5 moles(B)9moles
(C) 8 moles (D) 30.5 moles

Section iI

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