Class/Course - Medical Entrance

Subject - Chemistry

Total Number of Question/s - 3530

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• 1. Some Basic Concepts of Chemistry - Quiz

1. Ratio of CP and CV of a gas 'X' is 1.4. The number of atoms of the gas 'X' present in 11.2L of it at NTP will be
a) 6.02 × 1023
b) 1.2 × 1023
c) 3.01 × 1023
d) 2.01 × 1023

2. The number of moles of Kmno4 that will be needed to react with one mole of sulphite ion in acidic solution is
a) 4/5
b) 2/5
c) 1
d) 3/5

• 2. Atomic Structure - Quiz

1. The uncertainly in momentum of an electron is 1× 10-5 kg0m/s. The uncertainly in its position will be (h= 6.62 × 10-34 kg m2/s)
a) 1.05 × 10-28 m
b) 1.05 × 10-26m
c) 5.27 × 10-30m
d) 3.25 × 10-28m

2. For azimuthal quantum number l = 3, the maximum number of electrons will be
a) 2
b) 6
c) 0
d) 14

• 3. Chemical Bonding - Quiz

1. In which of the following molecules are all the bonds are not equal?
a) ClF3
b) BF3
c) AlF3
d) NF3

2. In  $PO_{4}^{3-}$ ion, the formal charge on each oxygen atom and P-O bond order respectively are
a) -0.75, 0.6
b) -0.75, 1.0
c) -0.75,1.25
d) -3,1.25

• 4. Solutions - Quiz

1. Vapour pressure of benzene at 300C is 121.8 mm . When 15g of a non-volatile solute is dissolved in 250 g of benzene its vapour pressure decreased to 120.2mm. The molecular weight of the solute is (mol wt of solvent = 78)
a) 356.2
b) 456.8
c) 530.1
d) 656.7

2. Which of the following 0.10M aqueous solution will have the lowest freezing point?
a) Al2(SO4)3
b) C5H10O5
c) KI
d) C12H22O11

• 5. States of Matter - Quiz

1. A ideal gas cannot be liquified because
a) its critical temperature is always above 00C
b) its molecules are relatively smaller in size
c) it solidifies before becoming a liquid
d) forces operating between its molecules are negligible

2. The surface tension of which of the following liquids is maximum?
a) H2O
b) C6H6
c) CH3OH
d) C2H5OH

• 6. Nuclear Chemistry - Quiz

1. Sulphur = 35 (34.96903 u) emits a β -particle but no γ-ray . The product is chlorine = 35 (34.96885 u). The maximum energy emitted by the β - particle is
a) 16.758 M2V
b) 1.6758 MeV
c) 0.16758 MeV
d) 0.016758 MeV

2. The radio isotope, tritium (1H3) has a half-life of 12.3 yr . If the initial amount of tritrium is 32mg. How many milligrams of it would remain after 49.2 yr?
a) 4 mg
b) 8 mg
c) 1 mg
d) 2 mg

• 7. Chemical Equilibrium - Quiz

1. The rate of reaction depends upon the
a) volume
b) force
c) pressure
d) conc Of reactants

2. The dissociation constants for acetic acid and HCN at 250C are 1.5 × 10-5 and 4.5 × 10-10, respectively. The equilibrium constant for the equilibrium ,
CN- + CH3COOH HCN + CH3COO-
would be
a) 3.0 × 105
b) 3.0 × 10-5
c) 3.0 × 10-4
d) 3.0 × 104

• 8. Ionic Equilibrium - Quiz

1. The ionisation constant of ammonium hydroxide is 1.77 × 10-5 at 298K . Hydrolysis constant of ammonium chloride is
a) 5.65 × 10-10
b) 6.50 × 10-12
c) 5.65 × 10-13
d) 5.65 × 10-12

2. 0.1 M solution of which one of these substance will be basic?
a) Sodium borate
b) Calcium nitrate
c) NH4Cl
d) Sodium sulphate

• 9. Thermodynamics - Quiz

1. The absolute enthalpy of neutralisation of the reaction
MgO(s) + 2HCl(aq) → MgCl2(aq) + H2O (l) will be
a) less than -57.33 kJ mol-1
b) -57.33 kJ mol-1
c) greater than -57.33 kJ mol-1
d) 57.33 kJ mol-1

2. Bond dissociation enthalpy of H2, Cl2 and HCl are 434, 242 and 431 kJ mol-1 respectively. Enthalpy of formation of HCl is
a) 93 kJ mol-1
b) -245 kJ mol-1
c) -93 kJ mol-1
d) 245 kJ mol-1

• 10. Chemical Kinetics - Quiz

1. The experiment data for the reaction  2A+B2 → 2AB is

The rate equation for the above data is
a) rate = k[B2]
b) rate = k[B2]2
c) rate = k[A]2[B]2
d) rate= k[A]2[B]

2. The temperature dependence of rate constant (k) of a chemical reaction is written in terms of Arrhenius equation, k = Ae-E/RT. Activation energy (E*) of the reaction can be calculated by plotting
a) log k vs $\frac{1}{T}$
b) log k vs $\frac{1}{log T}$
c) k vs T
d) k vs $\frac{1}{log T}$

• 11. Electrochemistry - Quiz

1. On heating one end of a piece of a metal, the other end becomes hot because of
a) energised electrons moving to the other end
b) resistance of the metal
c) mobility of atoms in the metal
d) minor perturbation in the energy of atoms

2. Reduction potential for the following half-cell reactions are
Zn → Zn2+ + 2e- ; (E0(Zn2+/Zn) = 0.76 V)
Fe → Fe2+ + 2e- ; (E0(Fe2+/Fe = -0.44 V)
The emf for the cell reaction
Fe2+ + Zn → Zn2+ + Fe will be
a) +0.32 V
b) -0.32 V
c) +1.20V
d) -1.20V

• 12. Surface Chemistry - Quiz

1. The langmuir adsorption isotherm is deduced by using the assumption that
a) the adsorption takes place in multilayers
b) the adsorption sites are equivalent in their ability to adsorb the particles
c) the heat of adsorption varies with coverage
d) the adsorbed molecules interact with each other

2. For adsorption of a gas on a solid, the plot of $log\frac{x}{m} \ vs \ log$ p is linear with slope equal to (n being whole number)
a) k
b) log k
c) n
d) $\frac{1}{n}$

• 13. Metallurgical Operations, Hydrogen and its Compounds - Quiz

1. The structure of H2O2 is
a) planar
b) non-planar
c) spherical
d) linear

2. Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?
a) carbon and hydrogen are suitable reducing agents for metal sulphides
b) The ΔfG0 of the sulphide is greater than those for CS2 and H2S
c) The ΔfG0 is negative for roasting of sulphide ore to oxide
d) Roasting of the sulphide to the oxide is thermodynamically feasible

• 14. Chemical Periodicity - Quiz

1. In the periodic table, with the increase in atomic number, the metallic character of an element
a) decrease in a period and increases in a group
b) increases in a period and decreases in a group
c) increases in a period as well as in the group
d) decreases in a period and also in the group

2. The ions O2-, F-, Na+, Mg2+ and Al3+ are isoelectronic. Their ionic radii show
a) an increase from O2- to F2- and then decrease from Na+ to Al3+
b) a decrease from O2- to F- and then increase from NA+ to Al3+
c) a significant increase from O2- to Al3+
d) a significant decrease from O2- to Al3+

• 15. Comparative Study of Elements - Quiz

1. Sodium is made by the electrolysis of a molten mixture of about 40% NaCl and 60% CaCl2 because
a) Ca2+ can reduce NaCl to Na
b) Ca2+ can displace Na from NaCl
c) CaCl2 helps in conduction of electricity
d) this mixture has a lower melting point than NaCl

2. Which of the following is known as fusion mixture?
a) Mixture of Na2CO3 + NaHCO3
b) Na2CO3 . 10H2O
c) Mixture of K2CO3 + Na2CO3
d) NaHCO3

• 16. d- and f-Block Elements - Quiz

1. Cinnabar is an ore of
a) Hg
b) Cu
c) Pb
d) Zn

2. Copper sulphate dissolves in excess of KCN to give
a) CuCN
b) [Cu(CN)4]3-
c) [Cu(CN)4]2-
d) Cu(CN)2

• 17. Coordination Compounds - Quiz

1. [Cr(H2O]Cl3 (at. No of Cr = 24) has a magnetic moment of 3.83 BM, the correct distribution of 3d electrons in the chromium of the complex is
a)
b)
c)
d)

2. In which of the following coordination entities the magnitude of Δ0 (CFSE in octahedral field) will be maximum?
a) [Co(H2O)6]3+
b) [Co(NH3)6]3+
c) [Co(CN)6]3-
d) [Co(C2O4)3]3-

• 18. Chemical Analysis - Quiz

1. A organic compound contains C = 40% , O = 53.34% and H = 6.60% . The empirical formula of the compound is
a) CH2O
b) CHO
c) CH4O2
d) C2H2O

2. Camphor is often used in molecular mass determination because
a) it is readily available
b) it has a very high cryoscopic constant
c) it is volatile
d) it is solvent for organic substances

• 19. General Organic Chemistry - Quiz

1. Names of some compounds are given. Which one is not correct in IUPAC system?
a)

b)

c)

d)

2. IUPAC name of the following is

a) 1,5-hexenyne
b) 1-hexene-5-yne
c) 1-hexyne-5-ene
d) 1,5-hexynene

• 20. Hydrocarbons - Quiz

1. Products of the following reaction
are
a) CH3CHO + CH3CH2CHO
b) CH3COOH + CH3COCH3
c) CH3COOH + HOOC.CH2CH3
d) CH3COOH+CO2

2. Reduction of 2-butyne with sodium in liquid ammonia gives predominantly
a) cis-2-butene
b) trans-2-butene
c) no reaction
d) n-butene

• 21. Alkyl Halides, Alcohols, Phenols and Ethers - Quiz

1.
In above reaction sequence , Z is
a) CH3CH2CH2NHCOCH3
b) CH3CH2CH2NH2
c) CH3CH2CH2CONHCH3
d) CH3CH2CH2CONHCOCH3

2. Replacement of Cl of chlorobenzene to give phenol requires condition but chlorine of 2,4- dinitro chlorobenzene is readily replaced. This is because
a) NO2 makes the ring electron rich at ortho and para positions
b) NO2 withdraws electrons from meta position
c) NO2 donates electrons at meta position
d) NO2 withdrwas electrons from ortho/para positions

• 22. Aldehydes and Ketones - Quiz

1. Which one of the following can be oxidised to the corresponding carbonyl compound?
a) 2-hydroxy propane
b) ortho-nitro phenol
c) Phenol
d) 2-methyl-2-hydroxy propane

2. A and B in the following reactions are

a) A = RR'CH2CN, B = NaOH
b)
c)
d)

• 23. Carboxylic Acids and their derivatives - Quiz

1. An ester (A) with molecular formula C9H10O2 was treated with excess of CH3MgBr and the complex so formed was treated with H2SO4 to given an olefin (B) Ozonolysis of (B) gave a ketone with molecular formula C8H8O which shows positive iodoform test. The structure of
a) C6H5COOC2H5
b) C6H5COOC6H5
c) H3CCOCH2COC6H5
d) P-H3CO-C6H4-COCH3

2. In a set of reactions propionic acid yielded a compound D.
$CH_{3}CH_{2}COOH \overset{SOCl_{2}}{\rightarrow} B \overset{NH_{3}}{\rightarrow} C \xrightarrow[Br_{2}]{KOH}$
The structure of D would be
a) $CH_{3}CH_{2}CH_{2}NH_{2}$
b) $CH_{3}CH_{2}CONH_{2}$
c) $CH_{3}CH_{2}NHCH_{3}$
d) $CH_{3}CH_{2}NH_{2}$

• 24. Nitrogen Compounds - Quiz

1. Mark the correct statement.
a) Methyl amine is slightly acidic
b) Methyl amine is less basic than ammonia
c) Methyl amine is a stronger base than NH3
d) Methyl amine forms salts with alkalies

2. Aniline in a set of reactions yielded a product D.

The structure of the product D would be
a) C6H5CH2NH2
b) C6H5NHCH2CH3
c) C6H5NHOH
d) C6H5CH2OH

• 25. Polymers - Quiz

1. Terylene is a condensation polymer of ethylene glycol and
a) benzoic acid
b) phthalic acid
c) salicyclic acid
d) terephthalic acid

2. Acrilon is a hard, horny and a high melting material. Which of the following represents its structure?
a)
b)
c)
d)

• 26. Biomolecules and Chemistry in Everyday Life - Quiz

1. The number of molecules of ATP produced in the lipid metabolism of a molecule of palmonic acid is
a) 130
b) 36
c) 56
d) 86

2. Which of the following is correct statement?
a) starch is a polymer of α-glucose
b) Amylose is a component of cellulose
c) Proteins are composed of only one type of amino acid
d) In cyclic structure of fructose, there are four carbons and one oxygen atom