K V Khammam
Vacation Home Work (Autumn Break) 2015-16.
Class: XI
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Sub: English
1. Read at least two short reports in any English newspaper. Cut and paste them on
your note-book. On the basis of your reading of these reports, make notes on them
in points only, using headings and sub-headings. Use recognizable abbreviations
wherever necessary.
2. Write a speech in about 150 words about the Increasing Crime rate against
Women.
3. During the Autumn break, a team of school students from Kendriya Vidyalaya,
Khammam visited a village named Raghunatha Puram . The team was much
worried on noticing the most pitiable insanitary conditions prevailing there. The team
collected the villagers and its leader Mr. Ram Yadav and gave a short speech on
the necessity and benefits of remaining clean. Write the speech in about 200 words.
4. Write a letter in not more than 150-200 words to the Editor of a daily commenting
on the increasing display of violence in latest movies.
5. Praveen Chandra of 38-G, Gokulpuri, Palam, New Delhi wants to let out a portion
of his house only to foreigners/ Central Govt. employees. Draft a suitable
advertisement to be published in the To-Let column of a national daily giving
necessary details.
6. Two Unseen passages : Write/ paste the passages in note book and solve
the passage questions.
7. Reading Task: Read the prescribed novel “ The Canterville Ghost” and
write
the book review . Focus on characters and theme.
CHEMISTRY HOLIDAYS HOMEWORK
1.For the equilibrium, 2NOCl(g) ⇌ 2NO(g) + Cl2 (g) the value of the equilibrium constant, Kc is 3.75 ×
10–6 at 1069 K. Calculate the Kp for the reaction at this temperature?
2. The following concentrations were obtained for the formation of NH3 from N2 and H2 at
equilibrium at 500K. [N2 ] = 1.5 × 10–2M. [H2 ] = 3.0 ×10–2 M and [NH3 ] = 1.2 ×10–2M. Calculate
equilibrium constant.
3. What will be the conjugate bases for the following Brönsted acids: HF, H2 SO4 and HCO3 – ?
4. Write the conjugate acids for the following Brönsted bases: NH2 – , NH3 and HCOO – .
5. Classify the following species into Lewis acids and Lewis bases and show how these act as such: (a)
HO – (b)F – (c) H+ (d) BCl3
6. The concentration of hydrogen ion in a sample of soft drink is 1x 10–3M. What is its pH ?
7. Describe the effect of a) addition of H2 b) addition of CH3OH c) removal of CO d) removal of
CH3OH on the equilibrium of the reaction: 2H2 (g) + CO (g) ⇌CH3OH (g)
8. Explain the physical significance of van der Waals parameters.
9. 34.05 mL of phosphorus vapour weighs 0.0625 g at 546 °C and 0.1 bar pressure. What is the molar
mass of phosphorus?
10. What will be the pressure of the gaseous mixture when 0.5 L of H2 at 0.8 bar and 2.0 L of
dioxygen at 0.7 bar are introduced in a 1L vessel at 27°C?
11. A neon-dioxygen mixture contains 70.6 g dioxygen and 167.5 g neon. If pressure of the mixture
of gases in the cylinder is 25 bar. What is the partial pressure of dioxygen and neon in the mixture ?
12. At 25°C and 760 mm of Hg pressure a gas occupies 600 mL volume. What will be its pressure at a
height where temperature is 10°C and volume of the gas is 640 ml.
13. Draw the Lewis structures for the following molecules and ions : H2S, SiCl 4 , BeF2 , CO3 −2 ,
HCOOH
14. Discuss the shape of the following molecules using the VSEPR model: BeCl2 , BCl3 , SiCl4 , AsF5 ,
H2S, PH3
15. Which hybrid orbitals are used by carbon atoms in the following molecules?
CH3 –CH3; (b) CH3 –CH=CH2; (c) CH3 -CH2 -OH; (d) CH3 -CHO (e) CH3 COOH
16. Describe the hybridization in case of PCl5 . Why are the axial bonds longer as compared to
equatorial bonds?
17. Assign oxidation number to the underlined elements in each of the following species:
(a) NaH2PO4 (b) NaHSO4 (c) H4P2O7 (d) K2MnO4 (e) CaO2
18. Balance the following equations in basic medium by ion-electron method and oxidation number
methods and identify the oxidizing agent and the reducing agent.
(a) P4(s) + OH– (aq)
(b) N2H4(l) + ClO3- (aq)
PH3(g) + HPO2 – (aq)
NO(g) + Cl– (g)
(c) Cl2O7 (g) + H2O2(aq)
ClO2 – (aq) + O2(g) + H+
19. Depict the galvanic cell in which the reaction Zn(s) + 2Ag+ (aq)
Zn2+(aq) +2Ag(s) takes
place, Further show: (i) which of the electrode is negatively charged, (ii) the carriers of the current in
the cell, and (iii) individual reaction at each electrode.
20. Given the standard electrode potentials, K+ /K = –2.93V, Ag+ /Ag = 0.80V, Hg2+/Hg = 0.79V
Mg2+/Mg = –2.37V. Cr3+ /Cr = –0.74V arrange these metals in their increasing order of reducing
power
विषय-हिन्दी
1) परियोजना कायय – स्वर साम्राज्ञी लता मंगेशकर जी के व्यक्ततत्व पर
प्रकाश डालते हुए जीवनवत
ृ ललखिए तथा उनके फिल्म जगत में दिये
योगिान पर सचित्र प्रकाश डाललए |
2) समनद
ु े शन कायय- संतलु लत भोजन के महत्व पर प्रकाश डालते हुए एक
िीिर ललखिए |
3) फकसी िै ननक समािार पत्र के संपािक को सड़क िर्
घ नाओं को रोकने
ु ट
के ललए सझ
ु ाव िे ते हुए एक पत्र ललखिए |
4) ‘गलता लोहा’ पाठ के आधार पर ग्रामीण बच्िों की लशक्षा के ववषय
पर ननबंध ललखिए |