CHEMISTRY CLASS 11 Group A very short questions

SET B
CHEMISTRY CLASS 11
Group A very short questions
Attempt any fifteen questions. 15*2=30
1.Define equivalent weight of element .A divalent metal has atomic weight 24.what is its equivalent weight.
2.State n explain Avogadro's hypothesis.
3.Difference between crystaline and amorphous solid.
4.How is boiling differ from Evaporation.
5.State and explain pauli- exclusion principle.
6.What is meant by Thermonuclear reaction ? write an example of it.
7.what is Bohr Bury law?.
8.What is octet rule?Name the two compounds in which octet rule is not followed.
9.Difference between polar and Non polar covalent bond with an example of each.
10.Define ionisation of energy and eletron affinity ? Give an important factor which influence the magnitude of eletron affinity.
11.Calculate the oxidation numbers Cr in K2Cr2O7 and boron in Na2B4O7.
12.State le- chatelier principal .what is the effect of temperature of the equilibrium of the following reaction.
N2 + 3H2 reversible sign give 2NH3
13.What happen when sodium is exposed to air .
14.Define term photochemical smog and Green house effect.
15.Why noble gases chemically inert.
16.How would you convert CO into Co2 and vice versa .
17.Difference between Calcination and roasting.
18.Write the molecular formula of hypophosphoric acid what happens white phosphorus is exposed to air.
19.Give a reaction to show acidic nature of ethylene.
2o.what are anti- knocking agent ? Name one imp antiknocking agent.
21.Give the two functional group isomer of C3H6O and write their iupAc name .
22.Identify the compound A and B .Give their IUPAC name
[A]----- alc KoH ----CH2-CH2---alkaline Kmno4 -- [B] .
Group B short questions
Attempt any five questions 5*5=25
23.Given CaCO3 + 2HCL--- cacl2 + H2O + Co2
if 10 gm of pure CaCO3 are added in a solution containing 7.65 gram of HCl.
a.find the limiting reactant.
b.Calculate the number of moles excess reactant left over unreacted.
c.Calculate the vol of Co2 gas produced at NTP.
d.Calculate the number of grams of NaoH reguired to absorb whole of the Co2 gas as Na2Co3.
24.What is the causes of the periodicity of element in the periodic table?.How do the Following properties vary in a group .
25.Define redox reaction? Balance the following equation by oxidation numbers or ion eletron method
Kmno4 + kcl + H2S04 --- mnSo4 + K2So4 + H2O + Cl2
26.How is nitric acid prepared from catalytic Oxidation of ammonia .why is conc conc HNO3 stored in dark bottle?.
27.Starting from sulphur ,how would you obtain H2S04 ?Give a reaction of each to show conc H2S04 acts as a.oxidising agent b.precipitating agent c.how is conc H2S04 diluted?
28.How is ethene prepared in the lab ?What happens when ethene is passed through Bayer's reagents?
29. write short notes plaster of paris?
GROUP C long questions 2*10=20
30.State and explain the Graham's law of diffusion .write the main application of Graham's law? Numerical problem
31.Skech a well labelled diagram for the manufacture of caustic soda (NAOH) by castner kellner process.explain the principal and procedure involved it.what happen when caustic soda is heated with sulphur and treated with Zinc?
32.How is pure Sulphur dioxide prepared in the lab ? Give it's action as a.acidified Kmno4 b.Fe2(So4)3 c.HI d.How is bleaching action of So2 differ from Cl2.
33.Write short notes ( any two)
a.isomerism of organic compounds
b.Homologous series
c.Relation between Kp and Kc
d.Bohr atomic model.