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Class XII Assignment for Unit Test 2

Assignment for unit test-ii AND IInd-TERM,std-xi

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States of Matter and Chemical Equilibrium:

1.A student forgot to add the reaction mixture to the round bottomed flask at 270C but instead he placed the flask on the flame.After a lapse of time , he realized his mistake and using a pyrometer he found the temperature of the flask was 4770C.What fraction of air would have been expelled out?

2. Dihydrogen gas used in Haber’s process is produced by reacting methane from natural gas with high temperature steam. The first stage of two stage reaction involves the formation of CO and H2. In second stage, CO formed in first stage is reacted with more steam in water gas shift reaction,

If a reaction vessel at 400°C is charged with an equimolar mixture of CO and steam such

that 4.0 bar, what will be the partial pressure of H2 at equilibrium?

Kp= 10.1 at 400°C.

3. What will be the pressure exerted by a mixture of 3.2 g of methane and 4.4 g of carbon dioxide contained in a 9 dm3 flask at 27 °C ?

4. At a certain temperature and total pressure of 105  Pa, iodine vapour contains 40% by

volume of I atoms

Calculate Kp for the equilibrium.

5. What would be the SI unit for the quantity pV2T 2/n?

6. Bromine monochloride, BrCl decomposes into bromine and chlorine and reaches the

equilibrium:

for which Kc= 32 at 500 K.If initially pure BrCl is present at a concentration of 3.3 × 10-3 molL-1, what is its molar concentration in the mixture at equilibrium?

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Annual English Elocution

Class XII Assignment for Unit Test 2

Assignment for Unit Test-ii, Std-xii

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Last Date for Submission-05-09-2019

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Topic:Chemical Kinetics

1.For a reaction A + B ® Product, the rate low is given by r = k[A]½ [B]2. What is the order of the reaction ?

2.The rate of a particular reaction quadruples when the temperature changes from 293 K to 313 K.Calculate activation energy.

3.If the decomposition of nitrogen oxide as follows a first order kinetics

  • Calculate the rate constant for a 0.05M solution if the instantaneous rate
    is 1.5 ´ 10–6 mol/l/s ?   
  • What concentration of N2O5 would give a rate of 2.45 ´ 10–5 mol L–1 S–1?           

4.The decomposition of hydrocarbon follows the equation                                                         K = (4.5 ´ 1011S–1) e–28000k/T.      Calculate Ea.

5. A reaction is of second order with respect to a reactant. How is the rate of reaction affected if the conc. of the reactant is reduced to half? What is the unit of rate constant for such a reaction?

Topic:Alcohols,Phenols and Ethers

6. How is phenol obtained from aniline ?

7.Ethanol has higher boiling point than methoxy methane. Give reason.

8. How will you convert :

 (i) Phenol to cyclohexanol (ii) Benzene chloride to benzyl alcohol (iii) Anisole to phenol

9. Phenol, when it first reacts with concentrated sulphuric acid, forms Y. The compound, Y is reacted with concentrated nitric acid to form Z. Identify Y and Z and explain why phenol is not converted commercially to Z by reacting it with conc. HNO3 .

10. Ethers are relatively inert. Justify.

11. Lower alcohols are soluble in water, higher alcohols are not. Why ?

12. Give equations of the following reactions :

(i) Oxidation of propan-1-al with alkaline KMnO4 solution.

(ii) Bromine in CS2 with phenol.

(iii) Treating phenol with chloroform in presence of aqueous NaOH.

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E-cell launch at MNPS

Kargil Diwas at MNPS

Kargil Diwas was observed this morning at Motilal Nehru Public School with guests Brigadier Ran Vijay Singh and Colonel V.S.Panag, Commanding officer of the 37 Jharkhand Battalion.

The distinguished guests addressed students of classes of VIII, XI and XII.

While Col. Panag reminded students about the tough conditions under which soldiers operate and the kargil war was fought, Brigadier Singh informed students about career opportunities in the defence forces with special emphasis on NCC.  He also added that the noblest task for a soldier is participation in the armed services through the infantry.  Giving details of various fighter planes and sharing his experiences he added that he had initiated Community Traffic Police which was doing quite well in several parts of the country.

Annual Awards Ceremony 2019

International Yoga Day

Summer Camp at MNPS

A summer camp, “Smile Campaign” was organized by Motilal Nehru Public School for the students of Std: III,IV and V from May 10th to May 15th.The activities included a prayer, aerobics, meditation, balloon claps, rocket claps each day. The main activities conducted were Ice breaking session, Table Manners, Proud Peacock, Tie and Dye, Confession Tree, Collage Making, Cooking without fire, Advertisement of their product and much more. The Campaign aimed at exploring students talent ,making friends, learning values like punctuality, truthfulness, honesty, self-esteem and team spirit. It also focused on developing positive attitude towards life –“be happy and make others happy” was the slogan. The camp concluded with a cooking competition and the winner team ‘’Delighted ‘’was awarded.  The students in the winning team were Abhijeet, Rudra, Trisha, Palak, Vaishnav, Utkarsh. The runners up team       ‘’ Giggle ‘’was also awarded and the team members were Rishika, Charu, Monisha, Ananya, Reet, Navya,Astami

The organising team comprised teachers and students. Teachers who worked under the guidance of the junior co-ordinator Purnima Tripathy were Sharda Kumari, Sriya Agarwal, Bindu Ahuja ,Swagata Banerjee, Archana Singh and Poonam Singh.

The support of our dynamic Principal, Mrs. Ashu Tiwary led to the success of the summer camp. 

School Cabinet Inducted 2019

School Cabinet 2019

It was a proud moment for the students of MOTILAL NEHRU PUBLIC SCHOOL when the investiture ceremony of the newly elected cabinet took place in the assembly ground on 09th May,2019.Students of deserving merit were allotted various offices such as those of the cabinet, the council and the House Captains.The new cabinet took an oath to carry out their duties with honesty,integrity and sincerity.

 The principal,Mrs. Ashu Tiwary,pinned the badges on the lapels of the office-bearers while the oath was administered by the Vice Principal,Dr.Ritu Choudhary.

S.P.L- MOHAMMAD ASAD REYAZ

A.S.P.L- KUNAL

CABINET MEMBERS

  • AQSA JABEEN XII ‘B’ BLUE
  • AASTHA  PANDEYXII ‘B’BLUE
  • NUPUR SINHA XII ‘C’BLUE
  • SHIVA BHARTI                  XII ‘B’RED
  • TEESTA BHARDWAJXII ‘B’BLUE
  • MOHAMMAD ADEEB      XII ‘A’BLUE
  • ANSHIKA RAGHUVANSHI XII ‘B’RED
  • AMRITA SRIVASTAVA XII ‘B’RED
  • ANJANA KUMARI              XII ‘A’BLUE
  • KRITIKA MISHRA               XII ‘A’RED
  • CHITRANSHA VARSHNEY XII ‘A’RED
  • ANISH KUMAR                   XII ‘A’BLUE
  • DEEPAK KUMAR SINGH-XII  ‘B’BLUE

 

COUNCILLORS

  • PRAGATI BAJPAYEEXII ‘C’BLUE
  • AASTHA XII ‘C’BLUE
  • SHRUTI VARSHNEYXII ‘C’GREEN
  • SHRUTIXI  ‘C’BLUE
  • SHRUTI BHARTIXI ‘A’            YELLOW
  • RAMSHA RAHMANXII ‘C’BLUE
  • ARUNIMA KUMARIXI ‘B’            BLUE

HOUSE CAPTAIN AND VICE CAPTAIN

YELLOW HOUSE

  • VAIBHAV VISHAL SINGH (CAPTAIN)
  • MUSKAN BURNWAL(VICE-CAPTAIN)

RED HOUSE

  • HERA NAWAL KHAN(CAPTAIN)
  • YASH SINHA(VICE-CAPTAIN)

GREEN HOUSE

  • MOHAMMAD SHAHNAWAZ ALI(CAPTAIN)
  • UTKARSH OJHA(VICE-CAPTAIN)

 BLUE HOUSE

  • REWATI VARSHNEY    (CAPTAIN)
  • AMRENDRA MISHRA  (VICE-CAPTAIN)