This page requires a JavaScript-enabled browser
Instructions on how to enable your browser are contained in the help file.
2017 Neet - Chemistry
1.
Name the gas that can readily decolourise acidified `KMnO_4` solution
a) `SO_2`
b) `P_2O_5`
c) `NO_2`
d) `CO_2`
2.
Mechanism of a hypothetical reaction `X_2 + Y_2 -> 2XY` is given below :
(i) `X_2 -> X + X`(fast)
(ii) `X + Y_2 hArr XY + Y` (slow)
(iii) `X + Y -> XY` (fast)
The overall order of the reaction will be :
a) 2
b) 0
c) 1.5
d) 1
3.
The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration?
a) Carbon family, [Rn] `5f^14 6d^10 7s^2 7p^2`
b) Oxygen family, [Rn] `5f^14 6d^10 7s^2 7p^4`
c) Nitrogen family, [Rn] `5f^14 6d^10 7s^2 7p^6`
d) Halogen family, [Rn] `5f^14 6d^10 7s^2 7p^5`
4.
The heating of phenyl-methyl ethers with HI produces
a) iodobenzene
b) phenol
c) benzene
d) ethyl chlorides
5.
Which one is the correct order of acidity?
a) `CH -= CH > CH_3-C -= CH>CH_2=CH_2>CH_3-CH3`
b) `CH -= CH>CH_2=CH_2>CH_3-C-=CH>CH_3-CH_3`
c) `CH_3-CH_3>CH_2=CH_2>CH_3-C-=CH>CH-=CH`
d) `CH_2=CH_2>CH_3-CH=CH_2>CH_3-C-=CH>CH-=CH`
6.
Predict the correct intermediate and product in the following reaction:
a) 1
b) 2
c) 3
d) 4
7.
The equilibrium constant of the following are
a) `(K_2 K_3^3)/K_1`
b) `(K_2K_3)/K_1`
c) `(K_2^2K_3)/K_1`
d) `(K_2K_3^3)/K_1`
8.
Which one is the most acidic compound ?
a) 1
b) 2
c) 3
d) 4
9.
The correct increasing order of basic strength for the following compounds is
a) III < I < II
b) III < II
c) II < I < III
d) II < III < I
10.
Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field ?
a) K
b) Rb
c) Li
d) Na
11.
The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is
a) Chromatography
b) Crystallisation
c) Steam distillation
d) Sublimation
12.
`HgCl_2` and `I_2` both when dissolved in water containing `I^-` ions the pair of species formed is
a) `HgI_2, I^-`
b) `HgI_4^2, I_3^-`
c) `Hg_2I_2, I^-`
d) `HgI_2, I_3^-`
13.
Mixture of chloroxylenol and terpineol act as
a) antiseptic
b) antipyretic
c) antibiotic
d) analgesic
14.
An example of a sigma bonded organometallic compound is
a) Grignard's reagent
b) Ferrocene
c) Cobaltocene
d) Ruthenocene
15.
A first order reaction has a specific reaction rate of `10^(-2) sec^(-1)`. How much time will it take for 20g of the reactant to reduce to 5 g?
a) 138.6 sec
b) 346.5 sec
c) 693.0 sec
d) 238.6 sec
16.
Match the interhalogen compounds of column-I with the geometry in column II and assign the correct code.
a) (iii), (i), (iv), (ii)
b) (v), (iv), (iii), (ii)
c) (iv), (iii), (ii), (i)
d) (iii), (iv), (i), (ii)
17.
Concentration of the `Ag^+` ions in a saturated solution of `Ag_2C_2O_4` is `2.2 × 10^(-4) mol L^(-1)` Solubility product of `Ag_2C_2O_4` is
a) `2.66 xx 10^(-12)`
b) `4.5 xx 10^(-11)`
c) `5.3 xx 10^(-12)`
d) `2.42 xx 10^(-8)`
18.
In the electrochemical cell :-
Zn | `ZnSO_4` (0.01M) || `CuSO_4`(1.0 M) | Cu, the emf of this Daniel cell is `E_1`. When the concentration of `ZnSO_4` is changed to 1.0 M and that of `CuSO_4` changed to 0.01M, the emf changes to `E_2`. From the followings, which one is the relationship between `E_1` and `E_2`? (Given, RT/F =0.059)
a) `E_1` < `E_2`
b) `E_1` > `E_2`
c) `E_2`= 0 `ne` `E_1`
d) `E_1` = `E_2`
19.
Which of the following pairs of compounds is isoelectronic and isostructural?
a) `TeI_2`, `XeF_2`
b) `IBr_2^-`, `XeF_2`
c) `IF_3`, `XeF_2`
d) `BeCl_2`, `XeF_2`
20.
The IUPAC name of the compound below is
a) 5-formylhex-2-en-3-one
b) 5-methyl-4-oxohex-2-en-5-al
c) 3-keto-2-methylhex-5-enal
d) 3-keto-2-methylhex-4-enal
21.
Which one is the wrong statement?
a) The uncertainty principle is `Delta E xx Delta t >= h/(4pi)`
b) Half filled and fully filled orbitals have greater stability due to greater exchange energy, greater symmetry and more balanced arrangement.
c) The energy of 2s orbital is less than the energy of 2p orbital in case of Hydrogen like atoms
d) de-Broglies's wavelength is given `lambda = h/(m nu)`
22.
Which is the incorrect statement?
a) Density decreases in case of crystals with Schotty's defect
b) NaCl(s) is insulator, silicon is semiconductor, silver is conductor, quartz is piezo electric ctrystal
c) Frenkel defect is favoured in those ionic compounds in which sizes of cation and anions are almost equal
d) FeO 0.98 has non stoichiometric metal deficiency defect
23.
The species, having bond angles of `120^@` is
a) `CIF_3`
b) `NCl_3`
c) `BCl_3`
d) `PH_3`
24.
For a given reaction, `Delta`H = 35.5 kJ `mol^(-1)` and `Delta`S = 83.6 `JK^(-1) mol^(-1)`. The reaction is spontaneous at : (Assume that `Delta`H and `Delta`S do not vary with temperature)
a) T > 425 K
b) All temperatures
c) T > 298 K
d) T < 425 K
25.
Which of the following is a sink for CO ?
a) Micro organism present in the soil
b) Oceans
c) Plants
d) Haemoglobin
26.
If molality of the dilute solutions is doubled, the value of molal depression constant (`K_f`) will be
a) halved
b) tripled
c) unchanged
d) doubled
27.
Which of the following is dependent on temperature?
a) Molarity
b) Mole fraction
c) Weight percentage
d) Molality
28.
Which one of the following statements is not correct?
a) The value of equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium
b) Enzymes catalyse mainly bio-chemical reactions
c) Coenzymes increase the catalytic activity of enzyme
d) Catalyst does not initiate any reaction
29.
Identify A and predict the type of reaction:
a) 1
b) 2
c) 3
d) 4
30.
The correct order of the stoichiometries of `AgCl` formed when `AgNO_3` in excess is treated with the complexs: `CoCl_3. 6NH_3`, `CoCl_3. 5NH_3`, `CoCl_3. 4NH_3` respectively is
a) `3 AgCl, 1 AgCl, 2 AgCl`
b) `3 AgCl, 2 AgCl, 1 AgCl`
c) `2 AgCl, 3 AgCl, 1 AgCl`
d) `1 AgCl, 3 AgCl, 2 AgCl`
31.
The correct statement regarding electrophile is
a) Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile
b) Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile
c) Electrophile can be either neutral or positively charged species and can form a bond by accepting a pair of electrons from a nucleophile
d) Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile
32.
A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5atm from an initial volume of 2.50 L to a final volume of 4.50L. The change in internal energy `Delta`U of the gas in joules will be
a) - 500J
b) - 505J
c) + 505J
d) 1136.25J
33.
Which of the following reactions is appropriate for converting acetamide to methanamine?
a) Hoffmarnn hypobromamide reaction
b) Stephens reaction
c) Gabriels phthalimide synthesis
d) Carbylamine reaction
34.
With respect to the conformers of ethane, which of the following statements is true?
a) Bond angle changes but bond length remains same
b) Both bond angle and bond length change
c) Both bond angles and bond length remains same
d) Bond angle remains same but bond length changes
35.
In which pair of ions both the species contain S - S bond?
a) `S_4 O_6^(2-), S_2 O_3^(2-)`
b) `S_2 O_7^(2-), S_2 O_8^(2-)`
c) `S_4 O_6^(2-), S_2 O_7^(2-)`
d) `S_2 O_7^(2-), S_2 O_3^(2-)`
36.
It is because of inability of `ns^2` electrons of the valence shell to participate in bonding that
a) `Sn^(2+)` is oxidising while `Pb^(4+)` is reducing
b) `Sn^(2+)` and `Pb^(2+)` are both oxidising and reducing
c) `Sn^(4+)` is reducing while `Pb^(4+)` is oxidising
d) `Sn^(2+)` is reducing while `Pb^(4+)` is oxidising
37.
Correct increasing order for the wavelengths of absorption in the visible region the complexes of `Co^(3+)` is
a) `[Co(H_2O_6)]^(3+), [Co(en)_3]^(3+),[Co(NH_3)_6]^(3+)`
b) `[Co(H_2O_6)]^(3+), [Co(NH_3)_6]^(3+), [Co(en)_3]^(3+)`
c) `[Co(NH_3)_6]^(3+), [Co(en)_3]^(3+), [Co(H_2O_6)]^(3+)`
d) `[Co(en)_3]^(3+), [Co(NH_3)_6]^(3+), [Co(H_2O_6)]^(3+)`
38.
Consider the reactions & Identify A, X, Y and Z:
a) A-Methoxymethane, X-Ethanol, Y-Ethanoic acid, Z-Semicarbazide.
b) A-Ethan a l, X-Ethano l , Y-B u t - 2 - e n a l , Z - S emicarbazone.
c) A-Ethanol, X-Acetaldehyde, Y-Butanone, Z-Hydrazone.
d) A-Methoxymethane, X-Ethanoic acid, Y-Acetate ion, Z-hydrazine.
39.
Of the following, which is the product formed when cyclohexanone undergoes aldol condensation followed by heating?
a) 1
b) 2
c) 3
d) 4
40.
Which of the following pairs of species have the same bond order?
a) `O_2, NO^+`
b) `CN^-, CO`
c) `N_2, O_2^-`
d) `CO, NO`
41.
Extraction of gold and silver involves leaching with `CN^-` ion. Silver is later recovered by
a) distillation
b) zone refining
c) displacement with Zn
d) liquation
42.
A 20 litre container at 400 K contains `CO_2(g)` at pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of `CO_2` attains its maximum value, will be: (Given that: `SrCo_3 (s) hArr SrO(s) + CO_2 (g)`, Kp = 1.6 atm)
a) 10 litre
b) 4 litre
c) 2 litre
d) 5 litre
43.
Pick out the correct statement with respect to `[Mn(CN)_6]^(3-)`:
a) It is `sp^3 d^2` hybridised and tetrahedral.
b) It is `d^2 sp^3` hybridised and octahedral.
c) It is `dsp^2` hybridised and square planar.
d) It is `sp^3 d^2` hybridised and octahedral.
44.
The reason for greater range of oxidation states in actinoids is attributed to:
a) actinoid contraction
b) 5f, 6d and 7s levels having comparable energies
c) 4f and 5d levels being close in energies
d) the redioactive nature of actinoids
45.
Which of the following statements is not correct:
a) Ovalbumin is a simple food reserve in egg-white
b) Blood proteins thrombin and fibrinogen are involved in blood clotting
c) Denaturation makes the proteins more active
d) Insulin maintanis sugar level in the blodd of a human body
This is more feedback!
This is the feedback!
feedback!
Back to Top