बिज्ञान सङ्काय तर्फ केमिस्ट्री का यी प्रश्नको उत्तर पढ्नुहोस तपाईं १०० % पास हुनुहुन्छ।

बिज्ञान सङ्काय  तर्फ केमिस्ट्री का यी प्रश्नको उत्तर पढ्नुहोस तपाईं १०० % पास हुनुहुन्छ।

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Class .11 students pls read this post n copy it
chemistry : 11 (65 marks out of 75 for 2075 grade approvemnet examination)
long questions neb 4 out of students ans 2 only
short questions neb 7 out of students ans 5 only
very short questions neb 22 out of students ans 15 only
Group A (very short questions) 15*2=30
b1. state law of equivalent and reciprocal.
2. The cost of table sugar C12 H22 O11 is Rs 24 per kg.calculate its cost per mole .
3.what do you mean by ideal gas and real gas ?
4.Define the terms viscosity and surface tension ? write it's unit.
5.Why is Hunds rule called rule of maximum multiplicity ?
6.Write down electronic configuration of a .K+ b.Cr
7.Define nuclear fission and nuclear fusion with example.
8.Define Diplo moment and give it an important application .
9.Define hydrogen bond .Give an example of intermolecular hydrogen bond and intramolecular hydrogen bond.
10.State modern n mendeelv peridic table
11.Define oxidation number. calculate the ON of a.carbon in H2C2O4 and b.phosphorous in H3 Po3
12.Every ore is mineral but every mineral is not oreas ? give rx
13.what us meant by equilibrium constant ? mention proper condition for maximum yield of So3 in the following equilibrium reaction
2So2 + O2---So3 + heat
14.Define term dead plaster , setting of plaster of paris
15.Give one important application of a.silica gel b.carboron c.sodium sicate d. Borax
16.write the molecular formula of hypo? how is So2 responsible for acid rain .
17.Compare the action of bleaching of So2 and Cl2 ?
18. Show that nascent hydrogen is power full reducing agent than molecular hydrogen.
19.Define eletrofile and nucleophile with suitable example.
20.Explain why sodium extract is alkaline in nature.b.organic compound are combustible
21.write down the iupac name of the following compounds
a. H2c-cH-cH2-"C-H (" vako tahu ma double bond O ho )
b.arko sigh lai garda laikin hai sorry
22. write the function of TEL in gasoline?
Group B (short questions) 5*5=25
23. consider a rx fe2o3 +3co - 2fe+ 3co2
10 gm of fe2O3 is reacted 9 gm of Co
a.find the limiting reagents.
b.how many mole of unreacted reactant left over ?
c.Calculate the mole of co consumed in the rx.
d.what mass of NaoH is required to absorb whole Co2 produced .
24.Define oxidation and reduction . Balance the following rx by oxidation numbers method or ion eletron method
a.Zn + HNO3 ------ Zn(NO3)2 + N2O + H2O
25. Describe Rutherford alpha ray scattering experiment.
26.Describe the preparation of bromine from carnalite.what happen when bromine is passed through hot and conc NaoH.
27.Write short notes on quick lime ?
28.How is Acetylene prepared in lab ?.what happens when acetylene gas is passed through ammonical sol of AgNo3.
29.How is carbon monoxide prepared in lab? give it's action with heated nickel.
Group c long questions 2*10=20
30.state Boyle's laws and charles law.derive the relation pv= numerical
31.Sketch a neat and well labelled diagram for the manufacture of sodium carbonate by solvey ammonia process.explain the chemical involved . what is the advantages of this process . write down the molecular formula of a.soda ash
b.baking soda
c.Washing soda.
32.Describe the principal and draw a self explanatory.sketch for the manufacture of ammonia by haber process .how does ammonia react with a.carbondioxide
b.CuSo4
c.Na metal
d.Cl2 gas in excess
33.Write short notes on (any two)
a.Detection of nitrogen ( lassaigne test for nitrogen )
b.Laws of mass action
c.mandelev periodic table
d.bleaching powder paste .