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2014 AIMPT - Chemistry
1.
What is the maximum number of orbitals that can be identified with the following quantum numbers?
n= 3, l = 1, `m_l` = 0
a) 1
b) 2
c) 3
d) 4
2.
Calculate the energy in joule corresponding to light of wavelength 45 nm (Planck’s constant h = `6.63 xx 10^(-34)` Js ; speed of light c = `3 xx 10^8 ms^( -1)`)
a) `6.67 xx 10^15`
b) `6.67 xx 10^11`
c) `4.42 xx 10^(-15)`
d) `4.42 xx 10^(-18)`
3.
Equal masses of `H_2`, `O_2` and methane have been taken in a container of volume V at temperature `27^oC` in identical conditions. The ratio of the volumes of gases `H_2` : `O_2` : methane would be
a) 8 : 16 : 1
b) 16 : 8 : 1
c) 16: 1 : 2
d) 8 : 1 : 2
4.
If a is the length of the side of a cube, the distance between the body centered atom and one corner atom in the cube will be
a) `2/sqrt(3) a`
b) `4/sqrt(3) a`
c) `sqrt(3)/4 a`
d) `sqrt(3)/2 a`
5.
Which property of colloids is not dependent on the charge on colloidal particles ?
a) Coagulation
b) Electrophoresis
c) Electro – osmosis
d) Tyndall effect
6.
Which of the following salts will give highest pH in water ?
a) KCl
b) NaCl
c) `Na_2CO_3`
d) `CuSO_4`
7.
Of the following 0.10 aqueous solutions, which one will exhibit the largest freezing point depression?
a) KCl
b) `C_6H_12O_6`
c) `Al_2 (SO_4)_3`
d) `K_2SO_4`
8.
When 22.4 litres of `H_(2 (g))` is mixed with 11.2 litres of `Cl_(2(g))`, each at S.T.P, the moles of `HCl_((g))` formed is equal to
a) 1 mol of `HCl_((g))`
b) 2 mol of `HCl_((g))`
c) 0.5 mol of `HCl_((g))`
d) 1.5 mol of `HCl_((g))`
9.
When 0.1 mol `MnO_4^(2-)` is oxidised the quantity of electricity required to completely oxidize `MnO_4^(2-)` to `MnO_4^-` is
a) 96500 C
b) 2 x 96500 C
c) 9650 C
d) 96.50 C
10.
Using the Gibbs energy change, `Delta G^o` = +63.3 kJ, for the following reaction, `Ag_2CO_(3(s)) hArr 2Ag_((aq))^+ + CO_(3(aq))^(2-)`
The `K_(sp)` of `Ag_2CO_(3(s))` in water at `25^o C` is (R = `8.314 J K^(-1) mol^(-1)`)
a) `3.2 xx 10^(-26)`
b) `8.0 xx 10^(-12)`
c) `2.9 xx 10^(-3)`
d) `7.9 xx 10^(-2)`
11.
The weight of silver (at.wt = 108) displaced by a quantity of electricity which displaces 5600 mL of `O_2` at STP will be
a) 5.4 g
b) 10.8 g
c) 54.0 g
d) 108.0 g
12.
Which of the following statements is correct for the spontaneous adsorption of a gas?
a) `Delta`S is negative and, therefore, `Delta`H should be highly positive.
b) `Delta`S is negative and therefore, `Delta`H should be highly negative.
c) `Delta`S is positive and therefore, `Delta`H should be negative.
d) `Delta`S is positive and, therefore, `Delta`H should also be highly positive.
13.
For the reversible reaction : `N_(2 (g)) + 3H_(2(g)) hArr 2 NH_(3(g)) + heat`
The equilibrium shifts in forward direction :
a) By increasing the concentration of `NH_(3(g))`
b) By decreasing the pressure
c) By decreasing the concentration of `N_(2(g))` and `H_(2(g))`
d) By increasing pressure and decreasing temperature
14.
For the reaction :
`X_2O_(4 (l)) rarr 2 XO_(2(g))`
`Delta`U = 2.1 k cal, `Delta`S = 20 cal `K^(-1)` at 300 K
Hence, `Delta`G is
a) 2.7 k cal
b) -2.7 k cal
c) 9.3 k cal
d) -9.3 k cal
15.
For a given exothermic reaction, `K_p` and `K_p^'` are the equilibrium constants at temperatures T1 and T2, respectively. Assuming that heat of reaction is constant in temperature range between T1 and T2, it is readily observed that
a) (1)
b) (2)
c) (3)
d) (4)
16.
Which of the following orders of ionic radii is correctly represented ?
a) (1)
b) (2)
c) (3)
d) (4)
17.
1.0 g of magnesium is burnt with 0.56 g `O_2` in a closed vessel. Which reactant is left in excess and how much? (At.wt.Mg = 24; O = 16)
a) Mg, 0.16 g
b) `O_2` , 0.16 g
c) Mg, 0.44 g
d) `O_2`, 0.28 g
18.
The pair of compounds that can exist together is
a) `FeCl_3, SnCl_2`
b) `HgCl_2, SnCl_2`
c) `FeCl_2, SnCl_2`
d) `FeCl_3, KI`
19.
`Be^(2+)` is isoelectronic with which of the following ions?
a) `H^+`
b) `Li^+`
c) `Na^+`
d) `Mg^(2+`
20.
Which of the following molecules has the maximum dipole moment ?
a) `CO_2`
b) `CH_4`
c) `NH_3`
d) `NF_3`
21.
Which one of the following species has plane triangular shape?
a) `N_3`
b) `NO_3^-`
c) `NO_2^-`
d) `CO_2`
22.
Acidity of diprotic acids in aqueous solutions increase in the order
a) (1)
b) (2)
c) (3)
d) (4)
23.
(a) `H_2O_2 + O_3 rarr H_2O + 2O_2`
(b) `H_2O_2 + Ag_2O rarr 2Ag + H_2O + O_2`
Role of hydrogen peroxide in the above reactions is respectively
a) Oxidizing in (a) and reducing in (b)
b) Reducing in (a) and oxidizing in (b)
c) Reducing in (a) and (b)
d) Oxidizing in (a) and (b)
24.
Artificial sweetner which is stable under cold conditions only is
a) Saccharine
b) Sucralose
c) Aspartame
d) Alitame
25.
In acidic medium, `H_2O_2` changes `Cr_2O_7^(-2)` to `CrO_5` which has two (-O-O-) bonds.
Oxidation state of Cr in `CrO_5` is
a) +5
b) +3
c) +6
d) -10
26.
The reaction of aqueous `KMnO_4` with `H_2O_2` in acidic conditions gives
a) `Mn_4 ^+ and O_2`
b) `Mn^(2+) and O_2`
c) `Mn^(2+) and O_3`
d) `Mn^(4+) and MnO_2`
27.
Among the following complexes the one which shows zero crystal field stabilization energy (CFSE) is
a) `[Mn(H_2O)_6]^(3+`
b) `[Fe(H_2O)_6]^(3+`
c) `[Co(H_2O)_6]^(2+`
d) `[Co(H_2O)_6]^(3+`
28.
Magnetic moment 2.83 BM is given by which of the following ions?
(At.nos. Ti = 22, Cr = 24, Mn = 25, Ni = 28)
a) `Ti^(3+`
b) `Ni^(2+`
c) `Cr^(3+`
d) `Mn^(2+`
29.
Which of the following complexes is used to be as anticancer agent ?
a) `mer – [Co (NH_3)_3 Cl]`
b) `cis – [Pt Cl_2 (NH_3)_2]`
c) `cis – K_2[Pt Cl_2 Br_2]`
d) `Na_2CoCl_4`
30.
Reasons of lanthanoid contraction is
a) Negligible screening effect of ‘f’ orbitals
b) Increasing Nuclear charge
c) Decreasing nuclear charge
d) Decreasing screening effect
31.
In the following reaction (refer fig), the product (A)
a) 1
b) 2
c) 3
d) 4
32.
Which of the following will be most stable diazonium salt `RN_2^+ X^-`?
a) `CH_3 N_2^(+) X^-`
b) `C_6H_5 N_2^(+) X^-`
c) `CH_3 CH_2 N_2^(+) X^-`
d) `C_6H_5 CH_2 N_2^(+) X^-`
33.
D (+) glucose reacts with hydroxyl amine and yields an oxime. The structure of the oxime would be
a) 1
b) 2
c) 3
d) 4
34.
Which of the following hormones is produced under the condition of stress which stimulates glycogenolysis in the liver of human beings ?
a) Thyroxin
b) Insulin
c) Adrenaline
d) Estradiol
35.
Which one of the following is an example of a thermosetting polymer?
a) 1
b) 2
c) 3
d) 4
36.
Which of the following organic compounds polymerizes to form the polyster Dacron?
a) Propylene and para HO – (`C_6H_4`) – OH
b) Benzoic acid and ethanol
c) Terephthalic acid and ethyleneglycol
d) Benzoic acid and para HO –(`C_6H_4`) – OH
37.
Which one of the following is not a common component of phototechemical smog ?
a) Ozone
b) Acrolein
c) Peroxyacetyl nitrate
d) Chlorofluorocarbons
38.
In the Kjeldahl’s method for estimation of nitrogen present in a soil sample, ammonia evolved from 0.75 g sample neutralized 10 mL of 1M `H_2SO_4`. The percentage of nitrogen in the soil is
a) 37.33
b) 45.33
c) 35.33
d) 43.33
39.
What products are formed when the following compound is treated with Br in the presence of `FeBr_3` ?
a) 1
b) 2
c) 3
d) 4
40.
Which of the following compounds will undergo racemisation when solution of KOH hydrolyses?
a) (i) and (ii)
b) (ii) and (iv)
c) (iii) and (iv)
d) (i) and (iv)
41.
Among the following sets of reactants which one produces anisole?
a) `CH_3CHO;RMgX`
b) `C_6H_5OH;NaOH;CH_3I`
c) `C_6H_5OH; text(neutral) FeCl_3`
d) `C_6H_5 – CH_3;CH_3COCl;AlCl_3`
42.
Which of the following will not be soluble in sodium hydrogen carbonate?
a) 2,4,6 – trinitrophenol
b) Benzoic acid
c) o – Nitrophenol
d) Benzenesulphonic acid
43.
Which one is most reactive towards Nucleophilic addition reaction?
a) 1
b) 2
c) 3
d) 4
44.
Identity Z in the sequence of reactions
a) 1
b) 2
c) 3
d) 4
45.
Which of the following organic compounds has same hybridization as its combustion product – (`CO_2`)?
a) Ethane
b) Ethyne
c) Ethene
d) Ethanol
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