Duration: 3 hrs Maximum marks: 70
All questions are compulsory.
i)Marks for each question are indicated against it.
ii)Question numbers 1 to 8 are very short answer questions and carry 1 mark each.
iii)Question numbers 9 to 18 are short answer questions and carry 2 marks each.
iv)Question numbers 1 9 to 27 are also short answer questions and carry 3 marks each.
v)Question numbers 28 to 30 are long answer questions and carry 5 marks each.
vi)Use logarithm tables if necessary. Use of calculator is not allowed.
|1||Calculate the number of moles in 14g of N2 molecule.||(1)|
|2||What would be the IUPAC and symbol for the elements with atomic numbers 121 and 113.||(1)|
|3||Draw the Lewis dot structure of Nitrite ion (NO2–).||(1)|
|4||What do you meant by bond length?||(1)|
|5||Define coefficient of viscosity. What is its S.I. unit?||(1)|
|6||Calculate the oxidation number of phosphorous in H3P2O7– and Au in HAuCl4.||(1)|
|7||How the presence of H– ions be confirmed in ionic hydrides?||(1)|
|8||What do you understand by the term hydrogen economy ?||(1)|
|9||Chlorine is prepared in the laboratory by treating MnO2 with aqueous HCl according to the reaction:
How many grams of HCl react with 5.0 g of MnO2?
What mass of CaCO3 is required to react completely with 25ml of 0.75 M HCl?
Atomic mass of Mn=25,Ca=20 Read more…