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Q.31 Which of the following changes takes place
during roasting ?
(1) Oxidation – reduction
(2) Only oxidation
(3) Only reduction
(4) Neither oxidation nor reduction
Q.32 Which pair of molecule have permanent dipole
moment :
(1) XeF4, SF4 (2) ClF3, BF3
(3) BrF3, PF3 (4) SnCl2, HgCl2
Q.33 In the general electronic configuration
ns 2 (n–1)d 0–1 (n–2)f 1–14 . If value of n = 7, the
wrong statement would be :
(1) The element is actinide
(2) The element is radioactive
(3) The element is d-block metal
(4) The element belong to III B group
Q.34 Which of the following is not a consequence of
the lanthanoid contraction :
(1) Zr and Hf have comparable size
(2) Zr and Hf occurs together in the earth crust
in their minerals
(3) 5d series element have a higher IE1 than 4d
series
(4) Same oxidation state of Zr & Hf
Q.35 NH3 is heated at 15 atm from 27ºC to 347ºC
assuming volume constant. The new pressure
becomes 50 atm at equilibrium of the reaction
2NH3 N2 + 3H2. Calculate % of mole of
NH3 actually decomposed :
(1) 61.3 (2) 28.5
(3) 77 (4) 86.5
Q.36 0.078 g Al(OH)3 is dehydrated to Al2O3. The
Al2O3 so obtained reacted with 6 milliequivalent
of HCl. The equivalent of AlCl3 produced during
the reaction are :
(1) 10 –3 (2) 3 × 10 –3
(3) 4 × 10 –3 10
(4)
2
3 −
CHEMISTRY
Q.31 fuEu esa ls dkSulk ifjorZu HktZu ds nkSjku gksrk gS ?
(1) vkWDlhdj.k & vip;u
(2) dsoy vkWDlhdj.k
(3) dsoy vip;u
(4) u rks vkWDlhdj.k u gh vip;u
Q.32 fuEu esa ls dkSuls ;qXe dk LFkk;h f}/kzqo vk?kw.kZ gksrk
gS :
(1) XeF4, SF4 (2) ClF3, BF3
(3) BrF3, PF3 (4) SnCl2, HgCl2
Q.33 lkekU; bysDVªkWfud foU;kl
ns 2 (n–1)d 0–1 (n–2)f 1–14 esa] ;fn n dk eku 7 gks] rks
lgh dFku gksxk :
(1) rRo ,fDVukbM gS
(2) rRo jsfM;ks lfØ; gS
(3) rRo d-CykWd rRo gS
(4) rRo III B lewg ls lEcfU/kr gS
Q.34 fuEu esa ls dkSulk ySUFksukbM ladqpu dk ifj.kke
ugha gS :
(1) Zr rFkk Hf dk vkdkj rqY; gS
(2) HkwxHkZ ls Zr rFkk Hf buds v;Ldksa esa lkFk&lkFk
izkIr gksrs gSa
(3) 5d Js.kh ds rRoksa dk IE1, 4d Js.kh dh vis{kk
mPp gksrk gS
(4) Zr rFkk Hf dh leku vkWDlhdj.k voLFkk
Q.35 vk;ru dks fLFkj ekurs gq, NH3 dks 15 atm ij
27ºC ls 347ºC rd xeZ fd;k tkrk gSA vfHkfØ;k
2NH3 N2 + 3H2 ds lkE; ij uohu nkc
50 atm gks tkrk gSA okLrfod :i ls fo;ksftr NH3
ds % eksyksa dh la[;k gS :
(1) 61.3 (2) 28.5
(3) 77 (4) 86.5
Q.36 0.078 g Al(OH)3, Al2O3 esa futZyhd`r gksrk gSA
Al2O3 dks 6 feyh rqY;kad HCl ds lkFk fØ;k djds
izkIr fd;k tkrk gSA vfHkfØ;k ds nkSjku mRikfnr
AlCl3 ds rqY;kad gSa :
(1) 10 –3 (2) 3 × 10 –3
(3) 4 × 10 –3 10
(4)
2
3 −
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