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Malemgi khwaidagi phajaba thong
Practice your
Chemistry Knowledge
HEPTA INTERACTION QUESTIONS
(22th series)
Scopes:Chemical kinetics and thermodynamics
Q1.The reaction of 2H2(g)+O2(g) ®2H2O(l) is
thermodynamically feasible.but a mixture of
hydrogen and oxygen is kept at room temperature shows no tendency to form water
because they need
a) Light energy
b) heat energy
c) Activation energy d) threshold energy
tructural height-ta malemgi khwaidagi
henna wangba thong amasu oiriba cable-stayed bridge, The Millau Viaduct
haibasi houjikki oina malemgi khwaidagi
phajaba thongni haina lounari. Thong asigi
deck asi valley-gi floor-dagi 270 metre (890
ft) wangduna malemgi khwaidagi wangba
thongsingi manungda 10 shuba oiri.
Paris-tagi Spain phaobagi traffic tanglegi problem solve tounaba hotnabada thong
ashi poklakkhibani. Milau town manakta
leioba turel Tarn-gogi chaoraba lokchap
ama lanthokpana thong ashigi khwaidagi
shathiba amadi phajaba mashak oi. 1987
tagi thong ashigi plan touba houkhi. Architect 7 amasung engineering farm 8 tanaduna thabak loukhatpa houkhi. Multiple span
leiba cable-stayed design ama shanaba
oina 1987 ta warep loukhi.
Thong ashigi rout finalise touraba matungda technical, architectural amasung
S
landscape designer-shing tanaraga ayekpa
shaktam 5 puthoklaba matungda aroiba
oina khangattuna shaba houkhi. Kilometer 2.4 haibadi mile 1.5 shangba thong
ashi shupnagi €400 million ($600 million)
changna concrete 130,000 cubic meters
(170,000 cubic yards), concrete reinforce
tounaba stell 20,000 tonnes (222 short tons)
amashung shrouds amashung cable-shing
phanaba pree-stressed stell 5,500 tonnes
(6,000 short tons) shijinnaduna shaba thong
ashibu sharibashingna chahi 120 chatkani
haina matam thai.
Central span 6 amashung mast 7 leiba thong ashigi metallic deck-ki arumba
36,000 tonnes (40,000 short tons) ni. Khwaidagi wangba pylon-shing adu 250 meters or 810 ft lomni, mastki maton phaobada
343 meters or 1,125 ft) ni amadi khwaidagi
wangba road bridge deck (270 meters or
890 ft) ni.
Q2.For the reaction 3H2(g) N2(g) ĺ1+3(g),
the expression
represent
a) rate of decrease in concentration with time
b) rate of increase in concentration with time
c) rate of reactant with time
d) rate of product with time
Q3. A reactant with initial concentration ‘a’
mol L-1 follows zero order kinetics with the
rate constant k mol L-1. The time required to
go completion is
a) t sec
b) a sec
c)
d)
Q4. A reaction is 50% complete in two hours
and 75% complete will take
a) 2 hours
b) 3 hours
c) 4 hours
d) 5 hours
Q5. For the homogeneous decomposition
2N2O5(g) ®4NO2(g) O2(g). the order of reaction
with respect to N2O5 is
a) 1st order
b) 2nd order
c) zero order
d) pseudo order
Q6. The thermodynamic process taking place
under constant pressure is known as
a) Isothermal process
b) Isobaric process
c) Isochronic process
d) Adiabatic process noble gas
Q7. The relation DH = DE is for the states of
a) Solid and liquid b) solid and gases
c) liquid and gases d) none of these
Q8. The enthalpy of combustion of C12H22O11
is -5644kj/mol. The number of moles of oxygen required is
a) 22 moles
b) 11 moles
c) 12 moles
d) 6 moles
Q9. A cylinder of gas is assumed to contain
14.2 kg of butane having enthalpy of combustion (-2658kj/mol) the total energy of the
cylinder will be
a) 6.5 × 105kj
b) 2.6 × 105kj
c) 3.8 × 105kj
d) 4.4 × 105kj
Q10. The enthalpy of combustion of CO2 is
-393.51kj/mol. If 4.4 g of CO2 when completely burnt released
a) 393.51 kj
b) 3.93 kj
c) 39.35 kj
d) 4.0 kj
Answers in the 23nd series
Ans. of 21th Series
Q1 (b), Q2 (c), Q3 (b), Q4 (d), Q5 (b),
Q6 (a), Q7 (c), Q8 (b), Q9 (d), Q10 (d)
Hepta Interaction Centre most welcomes your
suggestion(s) to improve this sheet in the next series.
M. Aken Singh (9862125442)
e-mail:[email protected]
Or
[email protected]