Nios 12th Chemistry (313) English Medium Solved Assignments (TMA) 2021-22

 Chemistry (313)

Tutor Marked Assignment (2021-22)

20% Marks Of Theory

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Q1. Answer any one of the following questions in about 40-60 words.

(a). An element occurs in the bcc structure with cell edge 288 pm. The density of the element is 7.2 gm. How many atoms of the element does 208g of the element contain?

(b). Arrange the following in order of increasing for ionisation enthalpy Testify your answer. B,C,N,O.

Q2. Answer any one of the following questions in about 40-60 words. 

(a). (i) Chlorine has more negative electron gain enthalpy as compared to fluorine. Why?

(ii) Nitrogen is a gas but phosphorous is solid Why?

(b). (Na2B4O7.10H2O) is treated with Conc. H2SO4 Give Chemical reaction.

Q3. Answer any one of the following questions in about 40-60 words.

(a). What is role of MnO2 (Maganese dioxide) in the decomposition of KC1O3 (Potassium chlorate)? 

(b). What happen when NH3 is reacted with excess of Cl2. Give Chemical equation.

Q4. Answer any one of the following questions in about 100 to 150 words.

(a). Calculate the free energy change per mole for the following reactions.

∆H = 117.9 kJ, ∆S = 160.4JK–1

∆H = –57.2 KJ, ∆S = –175.6JK–1

(b). Explain the following.

(i) The reduction of a metal is easier if the metal is formed in liquid state at the temperature of reduction.

(ii) Pine oil is used in froth flotation process. 

(iii) For the extraction of which metal cyanide process is used?

(iv) Which method is used for the extraction of highly reactive metals?

Q5. Answer any one of the following questions in about 100 to 150 words.

(a). Define Protein, Give one example of each.

(i) Regulatory Protein 

(ii) Structural Protein

(iii) Transport Protein

(iv) Defence Protein

(b). (i) Is phenol is antiseptic or disinfectant? Explain 

(ii) Give caution of usage of the following.

1. Germicide
2. Antacid
3. Antipyretic
4. Tranquilizers and hypnoties

Q6. Prepare any one project out of the given below: 

(a). Make the two groups of students. One group belong to village students and other group belongs to urban city. Discuss environmental problem and answer the following?

(i) What is AQI (Air Quality Index)?

(ii) Which is more responsible for increase in AQI?

(iii) Why air quality is better in village as comparel to urban area?

(iv) What is the effects on the atmosphere if excess CO is present in atmosphere?

(v) Which gas is responsible for green house effect?

(vi) Which gases are responsible for acid rain?

(b). Make two groups of students and allow them to discuss the diseases caused due to deficiency of the various Vitamins. Answer the following.

(i) What is difference between hormone and Vitamins.

(ii) Give one example of water soluble Vitamin.

(iii) Give one example of Fat soluble Vitamin. 

(iv) Name the disease caused due to deficiency of Vitamin C.

(v) Name the disease caused due to deficiency of Vitamin A.

(vi) Name the disease caused due to deficiency of Vitamin B6.