Sulphur combines with oxygen to form two oxides `SO_(2)` and `SO_(3)` if 10 g of S is mixed with 12 g of `O_(2)`. The mole of `SO_(2)` and `SO_(3)` will be formed are M and N respectively, so that neither S nor oxygen will be left at the end of reaction. What is the value of `(4M)/(N)`?
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An inorganic compound on strong heating gave a blackish brown powder and two oxides of sulphur. The powder was dissolved in HCl when a yellow solution
Correct Answer - B (b) The compound is `FeS0_(4)` `2FeSO_(4)overset("heat")rarrunderset("Blackesh brown powder")underset()(Fe_(2)O_(3)+SO_(2)+SO_(3))` `Fe_(2)O_(3)+6HClrarrunderset("Yellow solution")underset()(2FeCl_(3)+3H_(2)O)` `FeCl_(3)+3CNoverset(-)Sunderset("colouration")underset("Blood red")(rarrFe(CNS)_(3))+3CI^(-)`
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Helium nuclei combines to form an oxygen nucleus. The energy released per nucleon of oxygen nucleus is if `m_(0)=15.834` amu and `m_(He)=4.0026 `amu
Correct Answer - A `4 ._(2)He^(4) rarr _(8)O^(16)` Mass defect `=4 xx 4.0026 -15.834 a.m.u.=0.1764 a.m.u.` Total energy released `=0.1764 xx 931 `MeV Energy released /Nucleon`=(0.1764 xx 931)/(16)=10.24 `MeV
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A reaction at 300 K with `DeltaG^(@)` `=- 1743 J//mol` consister of 3 mole of A(g), mole of B(g) and 3 mole of C (g). If A, B and C(g) . If A,B and C
Correct Answer - C `DeltaG^(@) =- "RT In K"_(eq)` `or,- 1743 = - 8.3 xx300 xx In K_(ep)` `K_(eq) = 2 =K_(eq) " for reaction 2A"hArr B+C " from given data"`
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One mole of ideal monoatomic gas `(gamma=5//3)` is mixed with one mole of diatomic gas `(gamma=7//5)`. What is `gamma` for the mixture? `gamma` Denote
Correct Answer - B Monoatomic `" "` `n_(1) = 1` Diatomic `n_(2) = 1 gamma_(2) = (7)/(5)` `(n_(1) + n_(2))/(gamma_("mix") - 1) = (n_(1))/(gamma_(1) - 1) + (n_(2))/(gamma_(2) - 1) implies...
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1 mole of `Fe_(2)O_(3) and ` 2 mole of Al are mixed at temperature `25^(@)C` and the reaction is completedto give: `Fe_(2)O_(3)(s)+2Al(s)toAl_(2)O_(3)
Mass of products =Mass of one mole `Al_(2)O_(3)`+Mass of two mole Fe ltBrgt `=214g` `q=msDeltaT=214xx0.8xx(1803-298)` `=-257656J=257.656kJ` Heat requried is less than heat released, hence the temperature can be easily raised...
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One mole of an ideal monoatomic gas `(gamma = (5)/(3))` is mixed with one mole of a diatomic gas `(gamma=(7)/(5))`. (`gamma` denotes the ratio of spec
`gamma_(mix)=(C_(P_("mix")))/(C_(V_("mix")))=(1+(5)/(2)R+1xx(7)/(2)R)/(1xx(3)/(2)+1xx(5)/(2)R)`
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In the following reactions: `4NH_(3)(g)+5O_(2)(g) to 4NO_(g)+6H_(2)O(l)` When 1 mole ammonia and 1 mole of `O_(2)` are mixed, then the number of moles
Correct Answer - A 1 mole of `NH_(3)` (on complete reaction) give 1 mole NO. Similarly, 1 mole of `O_(2)` (on complete reaction) give `(4)/(5)`.i.e. 0.8 mole NO. Thus, `O_(2)` will...
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The number of acidic oxides oxides among the following are `CO_(2),Rb_(2)O,Mn_(2)O_(7),CrO_(3),Na_(2)O,MgO,Al_(2)O_(3),SO_(2)`
Correct Answer - 6 Infra red lines = Paschen + Brackets + Pfund = 6
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Pure sulphur was burnt. the gaseous products are `SO_(2)=60%` (mol), `SO_(3)=20%` (mol) and `O_(2)=20%` (mol). If initially 50 moles of sulphur was ta
Assume that mole of product mixture =x mole `n_(a)=50=xxx0.6+x xx0.2-0.8x` `x=(50)/(0.8)=(500)/(8)=62.5` `n_(o_(2))` remain=62.5xx0.2-12.5 `n_(o)=2xxn_(SO_(2))+3xxn_(SO_(3))=2xx x xx0.6+3xx x xx0.2` `n_(o)=1.2x+0.6x=1.8x=1.8xx62.5` `n_(o_(2))=(1.8xx65)/(2)=0.9xx65=56.25` `n_(o_(2))` total require `=56.25+12.5=68.75`
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When one mole of zinc combines with sulphuric acid 445 kJ of heat is liberated and when a mole of copper is liberated from blue vitriol 235 kj of heat
Correct Answer - 1.09 V
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