CHEMISTRY
(313)
TUTOR MARKED ASSIGNMENT
1-Answer any one out of the following questions in about 40 to 60 words.
a- Although B (Boron) is smaller in size as compared to Be (Berellium) but the first ionisation
enthalpy of Be (Berellium) is higher than B (Boron). (See Lesson-3)
b- Out of the following which has more negative electron gain enthalpy. Justify your answer.
F Or Cl (See Lesson-3)
2- Answer any one out of the following questions in about 40 to 60 words
a- Classify the following into Ferromagnetic, Antiferromagnetic and Ferrimagnetic
Fe3O4
, MnO2
, CrO2
, MnCl2
, CuFe2O4
, CrBr3
(See Lesson-6)
b- If Phosphorous is doped with silicon and silicon is doped with Boron, identified the type of
semi conductions.
3- Answer any one out of the following questions in about 40 to 60 words.
a- Oxide ores cannot be reduced by carbon. Why? (Seee Lesson-16)
b- Boron trichloxide exists a monomer why aluminium trichloxide exists as dimer why ?
4- Answer any one question in about 100 to 150 words.
a- Give two examples of products obtained on hydrolysis of disaccharides and polysaccharides.
(See Lesson-29)
b- (i) BCl3
LiAlH4
osQ lkFk vfHkfozQ;k djrk gSaA
(ii) Ca2
B6O11 Na2
CO3
osQ lkFk vfHkfozQ;k djrk g SA
What happens when - give balanced chemical equation:
(i) BCl3
reacts with LiAlH4
(ii) Ca2
B6O11 reacts with Na2
CO3
(See Lesson-19)
5- Answer any one question in about 100 to 150 words.
a- (i) Define standard enthalpy of formation. Write a chemical equation for the formation of
N2O5
.
b- (ii) At 17°C, the enthalpy of combustion of graphite to CO2 is –23110 J and that of CO to
CO2
is – 16261 J. Determine the enthalpy of formation of CO at 17°C.
(See Lesson-09)
c- (i) Write down Geometrical isomerism of [Co(NH3
(ii) Write down optical isomerism of [Co(en)3
]
3+ (See Lesson-22)
6- Explain any one project out of the given below.
a- Visit nearby place collect the water from different sources such as river, well, handpump etc.
and noted down difference in water quality
(i) Which one is more polluted water?
(ii) How industrialization is responsible for water pollution?
(iii) Name the water pollutant.
(iv) What is BOD?
(v) How does excess fluoride ion affect us?
(vi) Why is the chlorination of water done before drinking?
b- Visit the nearby medical soap and collect the following :
Borie acid, Sucrolose, Phenacetin, Phenol terfenadine, Magnesium hydroxide
(i) Name the compound used as antacid.
(ii) Name the compound used as antiseptic as well as disinfectant.
(iii) Name the compound used to control the sweetness.
(iv) Name the compound used as antipyretics.
(v) Name the compound used as antihistamines.
(vi) Name the compound used as antiseptic.