chemistry

EAMCET PREVIOUS PAPER QUESTIONS FORM STOICHIOMETRY PART-1

1. In which of the following reactions, ozone acts as reduactant

a) BaO₂+O₃---------> BaO+2O₂

b) 2HCl + O₃---------> Cl₂+ H₂O+ O₂

c) PbS+4O₃ --------->PbSO₄ +4O₂

d) 2KI+O₃+ H₂O ---------> 2KOH+I₂+O₂

2. what is the oxidation state of Fe in the product formed when acidified K₄[Fe(CN)₆] is treated with H₂O₂?

a)+2

b)+3

c)+1

d)+6

3.Cl₂ passed into dil.cold KOH solution. What are the oxidation numbers of Cl in the products formed

a)-1,+5

b)-1,+3

c)+1,+7

d)-1,+1

4. Oxidation number of N in HN₃

a)  -1/3

b)+1/3

c) zero

d) 1

5.How many moles of KClO₃ should be decomposed completely to obtain 67.2 lts of O₂ at STP

a)3

b)4

c)1

d)2

6.The oxidation no. of Mn of KMnO₄ is

a)+6

b)+7

c)+5

d)+8

7. How many grams of H₃PO₄ is required to completely neutralige 120g of NaOH

a) 49

b)98

c)196

d)9.8

8. What is the oxidation number of Cr in K₂Cr₂O₇

a)+7

b)+5

c)+6

d)+4

9.The volume in lit of CO₂ liberated at STP when 10g of 90% pure lime Is heated completely is

a)2.016

b)20.16

c)2.24

d)22.4

10. KMnO₄ oxisdises oxalic acid in acid medium the number of moles of CO₂ produced as per the balanced equation is

a) 10

b)8

c)6

d)3