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2016 Neet II - Chemistry
1.
Which one of the following compounds shows the presence of intramolecular hydrogen bond?
a) `H_2 O_2`
b) HCN
c) Cellulose
d) Concentrated acetic acid
2.
The molar conductivity of a 0.5 mol/`dm^3` solution of `AgNO_3` with electrolytic conductivity of `5.76 × 10^(–3)` S `cm^(–1)` at 298 K is
a) 2.88 S `cm^2`/mol
b) 11.52 S `cm^2`/mol
c) 0.086 S `cm^2`/mol
d) 28.8 S `cm^2`/mol
3.
The decomposition of phosphine (`PH_3`) on tungsten at low pressure is a firstorder reaction. It is because the
a) rate is proportional to the surface coverage
b) rate is inversely proportional to the surface coverage
c) rate is independent of the surface coverage
d) rate of decomposition is very slow
4.
The coagulation values in millimoles per litre of the electrolytes used for the
coagulation of `As_2S_3` are given below:
I. (NaCl) = 52,
II. `(BaCl_2)` = 0.69,
III. `(MgSO_4)` = 0.22
The correct order of their coagulating power is
a) I > II > III
b) II > I > III
c) III > II > I
d) III > I > II
5.
During the electrolysis of molten sodium chloride, the time required to produce 0.10 mol of chlorine gas using a current of 3 amperes is
a) 55 minutes
b) 110 minutes
c) 220 minutes
d) 330 minutes
6.
How many electrons can fit in the orbital for which n = 3 and l = 1?
a) 2
b) 6
c) 10
d) 14
7.
For a sample of perfect gas when its pressure is changed isothermally from `p_i` to `p_f`, the entropy change is given by
a) `DeltaS = nRln(p_f/p_i) `
b) `DeltaS = nRln(p_i/p_f) `
c) `DeltaS = nRTln(p_f/p_i) `
d) `DeltaS = nRTln(p_i/p_f) `
8.
The van't Hoff factor (i) for a dilute aqueous solution of the strong electrolyte barium hydroxide is
a) 0
b) 1
c) 2
d) 3
9.
The percentage of pyridine (`C_5H_5N`) that forms pyridinium ion (`C_5H_5N^+H`) in a 0.10 M aqueous pyridine solution (`K_b` for `C_5H_5N = 1.7 x 10^(-9))` is
a) 0.0060 %
b) 0.013 %
c) 0.77 %
d) 1.6 %
10.
In calcium fluoride, having the fluorite structure, the coordination numbers for calcium ion (`Ca^(2+)`) and fluoride ion (`F^–`) are
a) 4 and 2
b) 6 and 6
c) 8 and 4
d) 4 and 8
11.
If the `E^0` cell for a given reaction has a negative value which of the following gives the correct relationships for the values of `G^0` and Keq?
a) 1
b) 2
c) 3
d) 4
12.
Which one of the following is incorrect for ideal solution?
a) ΔHmix = 0
b) ΔUmix = 0
c) ΔP = Pobs – Pcalculated by Raoult’s law = 0
d) ΔGmix = 0
13.
The solubility of `AgCl_((s))` with solubility product `1.6 × 10^(–10)` in 0.1 M NaCl solution would be
a) `1.25 × 10^(-5)` M
b) `1.6 × 10^(-9) M`
c) `1.6 × 10^(-11) M`
d) zero
14.
Suppose the elements X and Y combine to form two compounds `XY_2` and `X_3Y_2`. When 0.1 mole of `XY_2` weighs 10 g and 0.05 mole of `X_3Y_2` weighs 9 g, the atomic weights of X and Y are
a) 40, 30
b) 60, 40
c) 20, 30
d) 30, 20
15.
The number of electrons delivered at the cathode during electrolysis by a current of 1 ampere in 60 seconds is (charge on electron = `1.60 ×10^(–19)` C)
a) `6 × 10^(23)`
b) `6 × 10^(20)`
c) `3.75 × 10^(20)`
d) `7.48 × 10^(23)`
16.
Boric acid is an acid because its molecule
a) contains replaceable `H^+` ion
b) gives up a proton
c) accepts `OH^–` from water releasing proton
d) combines with proton from water molecule
17.
AlF3 is soluble in HF only in presence of KF. It is due to the formation of
a) `K_3[AlF_3H_3]`
b) `K_3[AlF_6]`
c) `AlH_3`
d) `K[AlF_3H]`
18.
Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because
a) zinc is lighter than iron
b) zinc has lower melting point than iron
c) zinc has lower negative electrode potential than iron
d) zinc has higher negative electrode potential than iron
19.
The suspension of slaked lime in water is known as
a) Lime water
b) Quicklime
c) Milk of lime
d) Aqueous solution of slaked lime
20.
The hybridizations of atomic orbitals of nitrogen in `NO_2^+, NO_3^-` and `NH_4^+` respectively are
a) sp, `sp^3` and `sp^2`
b) `sp^2`, `sp^3` and sp
c) sp, `sp^2` and `sp^3`
d) `sp^2`, sp and `sp^3`
21.
Which of the following fluoro-compounds is most likely to behave as a Lewis base?
a) BF3
b) PF3
c) CF4
d) SiF4
22.
Which of the following pairs of ions is isoelectronic and isostructural?
a) `CO_3^(2-), NO_3^-`
b) `ClO_3^-, CO_3^(2-)`
c) `SO_3^(2-), NO_3^-`
d) `ClO_3^-, SO_3^(2-)`
23.
In context with beryllium, which one of the following statements is incorrect?
a) It is rendered passive by nitric acid.
b) It forms `Be_2 C`.
c) Its salts rarely hydrolyze.
d) Its hydride is electron-deficient and polymeric.
24.
Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidizing behavior?
a) `Cu + 2H_2SO_4 -> CuSO_4 + SO_2 + 2H_2O`
b) `3S + 2H_2SO_4 -> 3SO_2 + 2H_2O`
c) `C + 2H_2SO_4 -> CO_2 + 2SO_2 + 2H_2O`
d) `CaF_2 + H_2SO_4 -> CaSO_4 + 2HF`
25.
Which of the following pairs of d-orbitals will have electron density along the axes?
a) `d_z^2, d_(xy)`
b) `d_(xz), d_(yz)`
c) `d_z^2, d_x^2 - _y^2`
d) `d_(xy), d_x^2 - _y^2`
26.
The correct geometry and hybridization for XeF4 are
a) Octahedral, `sp^3 d^2`
b) Trigonal bipyramidal, `sp^3 d`
c) Planar triangle, `sp^3 d^3`
d) Square planar, `sp^3 d^2`
27.
Among the following which one is a wrong statement?
a) `PH_5` and `BiCl_5` do not exist
b) pπ-dπ bonds are present in `SO_2`
c) `SeF_4` and `CH_4` have same shape
d) I3
`I_3^+` has bent geometry
28.
The correct increasing order of trans-effect of the following species is
a) `NH_3 > CN^– > Br^– > C_6H_5^–`
b) `CN^– > C_6H_5^– > Br^– > NH_3`
c) `Br^– > CN^– > NH_3 > C_6H_5^–`
d) `CN^– > Br^– > C_6H_5^– >NH_3`
29.
Which one of the following statements related to lanthanons is incorrect?
a) Europium shows +2 oxidation state.
b) The basicity decreases as the ionic radius decreases from Pr to Lu.
c) All the lanthanons are much more reactive than aluminium.
d) Ce(+4) solutions are widely used as oxidizing agent in volumetric analysis.
30.
Jahn-Teller effect not observed in high spin complexes of
a) `d^7`
b) `d^8`
c) `d^4`
d) `d^9`
31.
Which of the following can be used as halide component for Friedel-Crafts reaction?
a) Chlorobenzene
b) Bromobenzene
c) Chloroethene
d) Isopropyl chloride
32.
In which of the following molecules, atoms are coplanar?
a) (1)
b) (2)
c) (3)
d) (4)
33.
Which one of the following structures represents nylon 6,6 polymer?
a) (1)
b) (2)
c) (3)
d) (4)
34.
In pyrrole the electron density is maximum on
a) 2 and 3
b) 3 and 4
c) 2 and 4
d) 2 and 5
35.
Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction?
a) (1)
b)
(2)
c) (3)
d) (4)
36.
Which one of the following nitro-compounds does not react with nitrous acid?
a) (1)
b) (2)
c) (3)
d) (4)
37.
The central dogma of molecular genetics states that the genetic information flows from
a) Amino acids → Proteins → DNA
b) DNA → Carbohydrates → Proteins
c) DNA → RNA → Proteins
d) DNA → RNA → Carbohydrates
38.
The correct corresponding order of names of following aldoses with configuration given below respectively, is
a) L-erythrose, L-threose, L-erythrose, D-threose
b) D-threose, D-erythrose, L-threose, L-erythrose
c) L-erythrose, L-threose, D-erythrose, D-threose
d) D-erythrose, D-threose, L-erythrose, L-threose
39.
In the given reaction (refer fig) the product P is
a) (1)
b) (2)
c) (3)
d) (4)
40.
A given nitrogen containing aromatic compound aromatic A reacts with Sn/HCl, followed by `HNO_2` to give an unstable compound B. B, on treatment with phenol, forms a beautiful coloured compound C with the molecular formula `C_12H_10N_2O`. The structure of the compound A is
a) 1
b) 2
c) 3
d) 4
41.
Consider the reaction `CH_3 - CH_2 - CH_2 - Br + NaCN -> CH_3 – CH_2 – CH_2 – CN + NaBr`
The reaction will be the fastest in
a) ethanol
b) methanol
c) N, N’ - dimethylformamide (DMF)
d) Water
42.
The correct structure of the product A formed in the reaction (refer fig)
a) 1
b) 2
c) 3
d) 4
43.
Which among the given molecules can exhibit tautomerism?
a) III only
b) Both I and III
c) Both I and II
d) Both II and III
44.
The correct order of the strengths of the carboxylic acids
a) I> II >III
b) II > III > I
c) III > II > I
d) II > I > II
45.
The compound that will react most readily with gaseous bromine has the formula?
a) `C_3H_6`
b) `C_2H_2`
c) `C_4H_10`
d) `C_2H_4`
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