NIOS TMA ASSIGNMENT CHEMISTRY (313) QUESTION PAPER – (2024-25)| SENIOR SECONDARY| ENGLISH MEDIUM
ASSIGNMENT (TMA) - 2024-25
CHEMISTRY
(313)
TUTOR MARKED ASSIGNMENT
Max. Marks: 20
Note: (i) All questions are compulsory. The marks
allotted for each question are given at same place.
(ii) Write your
name, enrollment number, Al name and subject on the top of the first page of
the answer sheet.
हिंदी माध्यम: यहां क्लिक करें
1. Answer any one out of the following questions in about 40 to 60 words. 2
(a) Identify the
group and valency of the element having atomic number 119. Also, predict the
outermost electronic configuration and write the general formula of its oxide. (See
Lesson-3)
(b) Electron
gain enthalpy of chlorine has more negative value as compared to that of fluorine
(F), explain the reason. (See Lesson-3)
2. Answer any one out of the following questions in about
40 to 60 words. 2
(a) How do
metallic and ionic substances differ in conducting electricity? (See Lesson-3)
(b) What is a
unit cell? How many atoms are there in a FCC unit cell? (See Lesson-6)
3. Answer any one out of the following questions in about
40 to 60 words. 2
(a) The enthalpy
change for the transition of liquid water to steam at temperature 373K is 40.8
UJ mol-1. Calculate the entropy change for the process. (See
Lesson-10)
(b) Name two
factors which favor a spontaneous reaction. (See Lesson-10)
4. Answer any one out of the following questions in about
100 to 150 words. 4
(a) Define water
pollution; list any three anthropogenic sources of water/pollution (See
Lesson-32)
(b) A liquid is
in equilibrium with its vapour in a sealed container at a fixed temperature.
The volume of the container is suddenly increased.
(i) What is the
initial effect of the change on vapour pressure?
(ii) How do
rates of evaporation and condensation change initially? (See Lesson-11)
5. Answer any one out of the following questions in about
100 to 150 words. 4
(a) Write the
name of any one metal which can be refined by distillation method. (See
Lesson-16)
(b) Describe the
electrolytic refining method with labeled diagram of copper metal. Write the name
of metal which is settled as anode mud. (See Lesson-16)
Or
Why are chromium oxide (Cr2O3) and
manganese oxide (Mn3O4) reduced by aluminium metal power
instead of carbon? Write the name of that process and chemical equations
related to reduction of above metal oxides. (See Lesson-16)
6. Prepare any one of the project out of two given below
in about 500 words. 6
(a) You have
visited a hospital of you town. You have found that some people were suffering from
higher, and some have minor injuries, while you are also patient of hyper
acidity and cold. Doctors prescribed different medicines to all the patients.
(i) What are the
names of antipyretic drugs? (One drug)
(ii) Write the
name of an antiseptic medicine.
(iii) Names of
two antacids?
(iv) Write the
name of one antihistamine.
(v) Quinine is
the very common medicine of which type of fever?
(vi) What type
of damage to body is possible if you are using phenol more than 1% concentrate?
(b) Visit the nearby treatment process of Sewage and collect
the following knowledge/ information.
(i) How many stages are there of treatment of waste
water?
(ii) What is coagulation?
(iii) What is substance?
(iv) What is softening?
(v) Which is used as disinfectant to kill bacteria?
(vi) How chlorine produces toxic and potentially active
carcinogens?
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