CHEM 1100 Modern College of Business and Science Fundamentals of Chemistry Questions chch – FUNDAMENTALS OF CHEMISTRY (ENGG.) – V4 no similarities plea

CHEM 1100 Modern College of Business and Science Fundamentals of Chemistry Questions chch – FUNDAMENTALS OF CHEMISTRY (ENGG.) – V4

no similarities please

……………………. HIGHER COLLEGE OF TECHNOLOGY
DEPARTMENT: APPLIED SCIENCE
Section: Applied Chemistry.
Final Assessment (Assignment) V4
Semester: II
Date:
A. Y.:2019 / 2020
01.05.2020 from: 10am
To: 03.05.2020 10am
Student Name
ID Number
Specialization
Level
DIPLOMA YR I
Course Name
FUNDAMENTALS OF CHEMISTRY (ENGG.)
Course Code
CHEM1100
4
Section
SECTION A
Question No.
Max.
Marks
1
SECTION B
Question No.
Max. Marks
5
7
10
2
5
8
10
3
5
4
5
5
5
6
5
Sub Total
30
Sub Total
20
Grand Total
Marks
Obtained Marks
/ 50
First Marker :
Second Marker:
Signature:
Signature :
Date :
Date :
1
Obtained Marks
INSTRUCTIONS TO STUDENTS
1. Type / write your full name and student number (ID Number) on the top of each page of
your Final Assessment (assignment)answer script (You can put them as “header” of each page).
2. The Final Assessment (Assignment) will be posted in the e-learning portal as per schedule.
You are given 2 days (48 hours) to answer the Final Assessment (Assignment). You must submit
your answer script through e-learning portal on or before the time and day as per schedule.
However, students may submit their Final Assessment (assignment) answer script through HCT
e-mail in exceptional cases as stipulated in the General Guidelines for students (Guideline No.
3). Multiple submissions are not allowed.
3. All answers should be computerized in MS Word. However for some courses, answers can be
handwritten on white paper using blue or black ink, scanned and must be submitted. Answers
can also be a combination of computerized and handwritten, as the case maybe, most
especially for courses that require formula or computation/calculations in their answers
4. This Final Assessment (assignment) is an open assessment, which means you may use
course handout, PowerPoint slides, textbooks and other relevant references including e-books
and internet websites (Masedar, Proquest, etc.). However, proper citation is required.
5. Marks will be deducted / cut for plagiarized work according to the plagiarism policy of the
College.
6. Submission after the allotted time will NOT be accepted. However, kind consideration
could be implemented as long as the processes stipulated in the General Guidelines for
students (Guideline Nos. 6 and 7) are strictly followed.
7. You are required to type your full name, ID number and date below the academic integrity
student declaration. This will be considered as your signature which means conformance to the
student declaration.
If you need more clarification, read the general guidelines for students posted in the e-learning
portal or feel free to contact your lecturer.
__________________________________________________________________________
Academic Integrity Student Declaration
I hereby declare that all my answers in this final assessment (assignment) are my own
original idea and work except for those that I have explicitly acknowledged with proper
citations, the source of the information. I also understand that plagiarism is an offense that
can lead to reduction of marks or disciplinary actions depending on the seriousness of the
case.
Student Name: _____________________
ID Number: __________________
Date: _______________________
2
SECTION A
Short answer questions
30 marks
Note: Answer all the questions
1a) Express 4, 650,0000 in scientific notation, with 2 significant figure.
b)
4.90 x 10-3 (1000)
—————————– =
11.55
c)
Observe the two processes and compare their differences.
(2 marks)
(3 marks)
2a) An element in the periodic table which is an odorless, tasteless gas and a poor
conductor of heat and electricity. The element is having four electrons in its
second shell. Identify the element .Write the electronic configuration of the
element?
(1 mark)
3
b) Calculate the following :
i) The number of atoms in 10 g of Neon.
(1 mark)
ii) The moles of oxygen gas in a container occupying 33.6dm3 volume at STP.
(1 mark)
iii) The RMM of sodium carbonate heptahydrate.
(1 mark)
iv) The mass of 0.0356 mol of dinitrogen pentoxide .
(1 mark)
3a) What are the essentials of a chemical equation? Illustrate with a suitable example.
(2 marks)
b) What is the information conveyed by a chemical equation?
4
(1 mark)
c) How many grams of water are formed when 0.200g of hydrogen (H2) reacts with
oxygen ?
(2 marks)
4a) Identify the ionic molecules among the following given examples and write their
correct formulae.
(3 marks)
i.
Potassium Iodide.
ii.
Silicon carbide.
iii.
Rubedium sulfide.
iv.
Nitrogen pentoxide.
v.
Cadmium (II) phosphide.
b) Mention the correct formula / type of the compound in the given space in below
table.
(2 marks)
S. No.
Name of compound
Formula of the
compound
1
Strontium Nitride
2
Cadmium(II) Sulfide
3
Beryllium hypochlorite
4
Phosphoric Acid
Type of
Compound
Sr3N2
Binary ionic
type II
Be(ClO)2
Acid
5
5) Calculate the mass % of each constituent present in Ferrous sulfate which is a
crystalline compound used in is a medicine to treat and prevent iron deficiency
anaemia.
(5 marks)
6) Calculate the molality of a solution of ethanoic acid in water in which the mole
fraction of ethanoic acid is 0.084.
(5 marks)
SECTION B
Long answer questions
20 marks
7a) An alkane has molecular mass 114.What is the molecular formula of the alkane?
Write down any three isomers with structures for this molecular formula?
(6 marks)
6
b) Give any three differences between ethane and ethane.
S. No
Ethane
(3 marks)
Ethene
1
2
3
c) Give the structure of an eight carbon alkane with an amino group in position 3 and
nitro group in position 4.
(1 mark)
8a) A chemistry professor asked his students to make standard solutions separately.
The first batch of students were asked to prepare 2 Molar solution whereas the
second batch 2 molal solution. Which method is more precise or accurate and
mention the reason.
(1mark)
b) List any two points of differences between the above two solutions.
S. No
2 molar solution
(2 marks)
2 molal solution
1
2
c) An hydrated compound with molecular mass 161, on analysis was found to
contain 14.31% sodium , 9.97% sulphur, 6.22% hydrogen and the rest oxygen.
Calculate the empirical and molecular formula of the compound.
(7 marks)
END OF PAPER
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