Nios Chemistry (313) Tutor Marked Assignment (TMA) Solved for October 2020 Exam

Nios Chemistry (313) Tutor Marked Assignment (TMA) Solved for October 2020 Exam | Nios Online Solved Assignment 2020 @9643289714

All questions are compulsary. The marks allotted for each question are given at same place.

Write your name enrollment numbers, AI name and subject on the top of the first page of the answer sheet.

(1) Answer any one out of the following questions in about 40-60 words:-

(a)What is Flux? Name the two types of Flux.

(b)Write balanced chemical equations for the reaction of -
(i) boron with ammonia.
(ii) silicon tetrachloride with water.

(2) Answer any one of the following questions in about 40-60 words.

(a) Identify the vitamin in each case whose deficiency causes the following symptoms -
(i) Neuro degeneration
(ii) Anorexia
(iii) Bleeding gums
(iv) Delayed blood clotting

(b) Differentiate between antiseptics and disinfactants.

(3)Answer any one out of the following questions in about 40 to 60 wards.

(a) Identify the segment of environement in each case where -
(i) organisms can survive and reproduce.
(ii) soil and minerals are found.
(iii) oxygen gas is found.
(iv) all types of water resources are found.

(b) A particular reaction is spontaneous upto 475K and becomes non-spontaneous at temperatures
above 475K.
(i) Is this reaction exothermic or endothermic?
(ii) Does entropy increase or decrease during this reaction?

(4) Answer any one out of the following questions in about 100-150 words.

(a) (i) Why is the second ionisation enthalpy of Ca is more than its first ionisation enthalpy ?
(ii) Why is the first ionisation enthalpy of Mg higher than Al?

(b) (i) Which crystal system has a  b c;    900 ? What are the possible lattice types of this crystal system?

(ii) What happens to the enthalpy of the adsorbate when it is adsorbed? What would happen
to its extent of adsorption when the temperature is decreased.

(5) Answer any one out of the following questions in about 100 to 150 words.
(a) (i) Give one example with balanced chemical equation of each of homogeneous and hetero
geneous chemical equilibrium systems.

(ii)Which defect in ionic solids decreases its density and causes the crystal to conduct electricity to some extent? Give one example of such a solid in which this defect is found.

(b) (i) What will be the effect of increase in pressure on the following equilibrium Explain.

(ii) The reaction between oxatic acid and acidified potassium permanganate at room temperature is very slow initially. Gradually it becomes fast. Explain. What is the name of the phenomenon involved.

(6) Prepare any one project out of those given below.

(a) Make a group of 7-10 students and collect ten articles made of polymers from their homes. Collect the following information about each of these polymers:
(i) Identify the polymer.
(ii) Find out its monomer.
(iii) What type of polymerization is involved in it?
(iv) Classify it on the basis of its origin, structure, method of polymerization and molecular forces.
(v) Is it biodegraable?
(vi) How can it be reused or recycled?

(b) Make a group of 7-10 students and collect data of AQI (Air Quality Index) of your city or any nearby city for 30 days.
(i) Record changes in AQI during this period of 30 days.
(ii) Make a list of air pollutants present in this city.
(iii) Find out the causes of the variations in AQI (like weather, local phenomenon like
crop burning, traffic, industry etc.).
(iv) Collect information about ill effect of major pollutants on heath.
(v) Suggest some measures to improve AQI in this city.

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