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2016 Neet I - Chemistry
1.
Consider the molecules `CH_4`, `NH_3` and `H_2O`. Which of the given statements is false?
a) The H - C - H bond angle in `CH_4`, the H - N - H bond angle in `NH_3`, and the H - O - H bond angle in `H_2O` are all greater than `90^o`.
b) The H - O - H bond angle in `H_2O` is larger than the H - C - H bond angle in `CH_4`.
c) The H - O - H bond angle in `H_2O` is smaller than the H - N - H bond angle in `NH_3`.
d) The H - C - H bond angle in `CH_4` is larger than the H - N - H bond angle in `NH_3`.
2.
In the reaction X and Y are (refer fig)
a) X = 1 – Butyne; Y = 3- Hexyne
b) X = 2 – Butyne; Y = 3 – Hexyne
c) X = 2- Butyne ; Y = 2- Hexyne
d) X = 1- Butyne ; Y = 2 – Hexyne
3.
Among the following the correct order of acidity is
a) `HClO_3 < HClO_4 < HClO_2 < HClO`
b) `HClO < HClO_2 < HClO_3 < HClO_4`
c) `HClO_2 < HClO < HClO_3 < HClO_4`
d) `HClO_4 < HClO_2 < HClO < HClO_3`
4.
The rate of first order reaction is `0.04 mol l^(-1)1 s^(-1)` at 10 seconds and `0.03 mol l^(-1)1 s^(-1)` at 20 seconds after initiation of the reaction. The half – life period of the reaction is
a) 24.1 s
b) 34.1 s
c) 44.1 s
d) 54.1 s
5.
Which one of the following characteristics is associated with adsorption?
a) `Delta G` is negative but `Delta H` and `Delta S` are positive
b) `Delta G`, `Delta H` and `Delta S` all are negative
c) `Delta G` and `Delta H` are negative but `Delta S` is positive
d) `Delta G` and `Delta S` are negative but `Delta H` is positive
6.
Which of the following statements is false?
a) `Mg^(2+)` ions form a complex with ATP
b) `Ca^(2+)` ions are important in blood clotting
c) `Ca^(2+)` ions are not important in maintaining the regular beating of the heart
d) `Mg^(2+)` ions are important in the green parts of plants
7.
Which of the following statements about hydrogen
a) Hydrogen has three isotopes of which tritium is the most common
b) Hydrogen never acts as cation in ionic salts
c) Hydronium ion, `H_3O^+` exists freely in solution
d) Dihydrogen does not act as a reducing agent
8.
The correct statement regarding a carbonyl compound with a hydrogen atom on its alphacarbon is
a) A carbonyl compound with a hydrogen atom on its alpha – carbon never equilibrates with its corresponding enol.
b) A carbonyl compound with a hydrogen atom on its alpha – carbon rapidily equilibrates with its corresponding enol and this process is known as aldehyde – ketone equilibration.
c) A carbonyl compound with a hydrogen atom on its alpha – carbon rapidly equilibrium with its corresponding enol and this process is known as carbonylation.
d) A carbonyl compound with a hydrogen atom on its alpha – carbon rapidly equilibrates with its corresponding enol and this process is known as keto – enol tautomerism.
9.
In which of the following options the order of arrangement does not agree with the variation of property indicated against it?
a) 1
b) 2
c) 3
d) 4
10.
MY and `NY_3` two nearly insoluble salts, have the same `k_(sp)` values of `6.2 xx 10^(-13)` at room temperature. Which statement would be true in regard of MY and `NY_3`?
a) The molar solubilities of MY and `NY_3` in water are identical.
b) The molar solubility of MY in water is less than that of `NY_3`.
c) The salts MY and `NY_3` are more soluble in 0.5 M KY than in pure water.
d) The addition of the salt of KY to solution of MY and `NY_3` will have no effect on their solubilities.
11.
In a protein molecule various amino acids are linked together by
a) `alpha` - glycosidid bond
b) `beta` - glycosidid bond
c) Peptide bond
d) Dative bond
12.
Natural rubber has
a) All cis – configuration
b) All trans – configuration
c) Alternate cis – and trans – configuration
d) Random cis – and trans – configuration
13.
Match items of Column I with the item of Column II and assign the correct code
Column I
Column II
(a) Cynide process
(i) Ultrapure Ge
(b) Froth floatation process
(ii) Dressing of ZnS
(c) Electrolytic reduction
(iii) Extraction of Al
(d) Zone refining
(iv) Extraction of Au
(v) Purification of Ni
a) (1)
b) (2)
c) (3)
d) (4)
14.
Which one of the following statements is correct when `SO_2` is passed through acidified `K_2Cr_2O_7` solution?
a) The solution turns blue
b) The solution is decolorized
c) `SO_2` is reduced
d) Green `Cr_2(SO_4)_3` is formed
15.
The electronic configurations of Eu (Atomic No.63), Gd (Atomic No.64 and Tb (Atomic No.65) are
a) `[Xe]4f^7 6s^2, [Xe]4f^8 6s^2 and [Xe]4f^8 5d^1 6s^2`
b) `[Xe]4f^6 5d^1 6s^2, [Xe]4f^7 5d^1 6s^2 and [Xe]4f^9 6s^2`
c) `[Xe]4f^6 5d^1 6s^2, [Xe]4f^7 5d^1 6s^2 and [Xe]4f^8 5d^16 s^2`
d) `[Xe]4f^7 6s^2, [Xe]4f^7 5d^1 6s^2 and [Xe]4f^9 6s^2`
16.
Two electrons occupying the same orbital are distinguished by
a) Principle quantum number
b) Magnetic quantum number
c) Azimutual qautum number
d) Spin qauntum number
17.
When copper is heated with cone. `HNO_3` it produces
a) `Cu(NO_3)` and `NO_2`
b) `Cu(NO_3)` and NO
c) `Cu(NO_3)_2` and `NO_2`
d) `Cu(NO_3)_2` and `N_2 O`
18.
Which of the following regents would distinguish cis-cyclopenta-1, 2-diol from the trans-isomer?
a) Aceptone
b) Ozone
c) `MnO_2`
d) Aluminium isopropoxide
19.
The correct thermodynamic condtions for the spotaneous eaction at all temprature is
a) 1
b) 2
c) 3
d) 4
20.
Lithium has a bcc structure. Its density is 530 kg `m^(-3)` and its atomic mass is 6.94g `mol^(-1)`. Calculate the edge lenth of a unit cell of Lithium metal. (`N_A = 6.02 × 10^(23) mo^(l-1)`)
a) 154 pm
b) 352 pm
c) 527 pm
d) 264 pm
21.
Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?
a) `I_2 > Br_2 > Cl_2 > F_2`
b) `Cl_2 > Br_2 > F_2 > I_2`
c) `Br_2 > I_2 > F_2 > Cl_2`
d) `F_2 > Cl_2 > Br_2 > I_2`
22.
Which of the following is an analgesic ?
a) Novalgin
b) Penicllin
c) Streptomycin
d) Chloromycetion
23.
Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape?
a) 1/8
b) 1/4
c) 3/8
d) 1/2
24.
Consider the nitration of benezene using mixed conc. H2SO4 and HNO3. If a large amount of `KHSO_4` is added to the mixture, the rate of nitration will be
a) faster
b) slower
c) unchanged
d) doubled
25.
Predict the correct order among the following
a) lone pair – lone pair > lone pair – bond pair > bond pair – bond pair
b) lone pair – lone pair > bond pair – bond pair > lone pair – bond pair
c) bond pair – bond pair > lone pair – bond pair > lone pair – lone pair
d) lone pair – bond pair > bond pair – bond pair > lone pair – lone pair
26.
The product obtained as a result of a reaction of nitrogen with `CaC2_` is
a) `Ca(CN)_2`
b) CaCN
c) `CaCN_3`
d) `Ca_2CN`
27.
Consider the following liquid — vapour equilibrium.
Liquid `hArr` Vapour.
Which of the following relations is correct?
a) `(dlnG)/(dT^2) = (Delta H_V)/(RT^2)`
b) `(dlnP)/(dT) = (-Delta H_V)/(RT)`
c) `(dlnP)/(dT^2) = (-Delta H_V)/(T^2)`
d) `(dlnP)/(dT) = (Delta H_V)/(RT^2)`
28.
Match the compounds given in column I with the hybridization and shape given in column II and mark the correct option.
Column I
Column II
(a) `XeF_6`
(i) distorted octahedral
(b) `XeO_3`
(ii) square planar
(c) `XeOF_4`
(iii) pyramidal
(d) `XeF_4`
(iv) square pyramidal
a) (i) (iii) (iv) (ii)
b) (i) (ii) (iv) (iii)
c) (iv) (ii) (i) (ii)
d) (iv) (i) (ii) (iii)
29.
Which of the following has longest C – O bond length? (Free C – O bond length in CO is 1.28 `A^o`.)
a) `Ni(CO)_4`
b) `[Co(CO)_4]`
c) `[Fe(CO)_4]^(2-)`
d) `[Mn(CO)_6]^+`
30.
The pressure of `H_2` required to make the potential of `H_2` – electrode zero in pure water at 298 K is
a) `10^(-14)` atm
b) `10^(-12)` atm
c) `10^(-10)` atm
d) `10^(-4)` atm
31.
The addition of a catalyst during a chemical reaction alters which of the following quantities?
a) Entropy
b) Internal Energy
c) Enthalpy
d) Activation Energy
32.
The ionic radii of `A^+` and `B^-` ions are `0.98 × 10^(-10) m` and `1.81 × 10^(-10) m`. The coordination number of each ion in AB is
a) 6
b) 4
c) 8
d) 2
33.
Which is the correct statement for the given acids?
a) Phosphinic acid is a diprotic acid while Phosphonic acid is a monoprotic acid.
b) Phosphinic acid is a monoprotic acid while Phosphonic acid is a diprotic acid.
c) Both are triprotic acids.
d) Both are diprotic acids.
34.
Fog is colloidal solution of
a) Liquid in gas
b) Gas in liquid
c) Solid in gas
d) Gas in gas
35.
Which of the following statements about the composition of the vapour over an ideal 1: 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant at `25^o` C. (Given, Vapour Pressure Data at `25^o` C, benzene = 12.8 kPa, toluene = 3.85 kPa)
a) The vapour will contain a higher percentage of benzene.
b) The vapour will contain a higher percentage of toluene.
c) The vapour will contain equal amounts of benzene and toluene.
d) Not enough information is given to make a prediction.
36.
The correct statement regarding the comparison of staggered and eclipsed conformations of ethane, is
a) The staggered conformation of ethane is less stable than eclipsed conformation, because staggered conformation has torsional strain.
b) The eclipsed conformation of ethane is more stable than staggered conformation, because eclipsed conformation has no torsional strain.
c) The eclipsed conformation of ethane is more stable than staggered conformation even though the eclipsed conformation has torsional strain.
d) The staggered conformation of ethane is more stable than eclipsed conformation, because staggered conformation has no torsional strain.
37.
The reaction below can be classified as:
a) Williamson ether synthesis reaction
b) Alcohol formation
c) Dehydration reaction
d) Williamson alcohol synthesis reaction
38.
The product formed by the reaction of an aldehyde with a primary amine is
a) Schiff base
b) Ketone
c) Carboxylic acid
d) Aromatic acid
39.
Which of the following biphenyl is optically active?
a) (1)
b) (2)
c) (3)
d) (4)
40.
For the following reactions, Which of the following statements is correct?
a) (a) and (b) are elimination reactions and (c) is addition reaction.
b) (a) is elimination, (b) is substitution and (c) is addition reaction.
c) (a) is elimination, (b) and (c) are substitution reactions.
d) (a) is substitution, (b) and (c) are addition reactions.
41.
At `100^o`C the vapour pressure of a solution of 6.5 g of a solute in 100 g water is 732mm. If `K_b` = 0.52, the boiling point of this solution will be
a) `101^o`C
b) `100^o`C
c) `102^o`C
d) `103^o`C
42.
The correct statement regarding RNA and DNA, respectively is
a) The sugar component in RNA is arabinose and the sugar component in DNA is 2’- deoxyribose.
b) The sugar component in RNA is ribose and the sugar component in DNA is 2’- deoxyribose.
c) The sugar component in RNA is arabinose and the sugar component in DNA is ribose.
d) The sugar component in RNA is 2’- deoxyribose and the sugar component in DNA is arabinose.
43.
The correct statement regarding the basicity of arylamines is
a) Arylamines are generally less basic than alkylamines because the nitrogen lone-pair electrons are delocalized by interaction with the aromatic ring π electron system.
b) Arylamines are generally more basic than alkylamines because the nitrogen lone-pair electrons are delocalized by interaction with the aromatic ring π electron system.
c) Arylamines are generally more basic than alkylamines because of aryl group.
d) Arylamines are generally more basic than alkylamines, because the nitrogen atom in arylamines is sp-hybridized.
44.
Which one given below is a non-reducing sugar?
a) Maltose
b) Lactose
c) Glucose
d) Sucrose
45.
The pair of electron in the given carbanion, `CH_3CH ≡ Co+`, is present in which of the following orbitals?
a) `2p`
b) `sp^3`
c) `sp^2`
d) `sp`
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