JEE MAINS 2002 CHEMISTRY ONLINE: QUIZ

JEE MAIN 2002 CHEMISTRY):-

What is the product when acetylene reacts with hypochlorous acid ?

(1) CH₃COCl

(2) ClCH₂CHO

(3) Cl₂CHCHO

(4) ClCHCOOH

JEE MAIN 2002 CHEMISTRY):-

Which of the following does not show geometrical isomerism?

JEE MAIN 2002 CHEMISTRY):-

The solubility of Mg(OH)₂ is S moles/litre. The solubility product under the same condition is

(1) 4 S³

(2) 3S⁴

(3) 4 S²

(4) S³

JEE MAIN 2002 CHEMISTRY):-

In a hydrogen atom, if energy of an electron in ground state is 13.6 eV, then that in the 2nd excited state is

JEE MAIN 2002 CHEMISTRY):-

Racemic mixture is formed by mixing two

JEE MAIN 2002 CHEMISTRY):-

The part of a transistor which is most heavily doped to produce large number of majority carriers is

JEE MAIN 2002 CHEMISTRY):-

A metal M readily forms its sulphate MSO₄ which is water - soluble. It forms its oxide MO which becomes inert on heating. It forms an insoluble hydroxide M(OH)₂ which is soluble in NaOH solution. Then M is

JEE MAIN 2002 CHEMISTRY):-

At absolute zero, Si acts as

JEE MAIN 2002 CHEMISTRY):-

For the reaction A + 2B → C , rate is given by R = [A][B]²  then the order of the reaction is

JEE MAIN 2002 CHEMISTRY):-

Freezing point of an aqueous solution is (−0.186)∘C. Elevation of boiling point of the same solution is Kb = 0.512∘C,Kf = 1.86∘C , find the increase in boiling point.

(1) 0.186∘C

(2) 0.0512∘C

(3) 0.092∘C

(4) 0.2372∘C

JEE MAIN 2002 CHEMISTRY):-

RNA is different from DNA because RNA contains

JEE MAIN 2002 CHEMISTRY):-

Un certainty in position of a minute particle of mass 25 g in space 10⁻⁵ is . What is the uncertainity in its velocity (in ms−1) ? (h = 6.6 × 10⁻³⁴Js)

JEE MAIN 2002 CHEMISTRY):-

Na and Mg crystallize in BCC and FCC type crystals respectively, then the number of atoms of Na and Mg present in the unit cell of their respective crystal is

JEE MAIN 2002 CHEMISTRY):-

If an endothermic reaction is non- spantaneous at freezing point of water and becomes feasible at its boiling point, then

JEE MAIN 2002 CHEMISTRY):-

The integrated rate equation is Rt = logC₀ − logC_t. The straight line graph is obtained by plotting

(1) time vs log C_t

(2) 1/time vs C_t

(3) time vs C_t

(4) 1/time vs 1/C_t

JEE MAIN 2002 CHEMISTRY):-

The metal extracted by leaching with a cyanide is

JEE MAIN 2002 CHEMISTRY):-

In which of the following reactions, increase in the volume at constant temperature does not affect the number of moles at equilibrium

(1)2NH₃ → N₂ + 3H₂

(2) C(g) + (1/2)O₂( g) → CO(g)

(3) H₂( g) + O₂( g) → H₂O₂( g)

(4) none of these

JEE MAIN 2002 CHEMISTRY):-

In case of nitrogen, NCl₃ is possible but not NCl₅ while in case of phosphorous, PCl₃ as well as

PCl₅ are possible. It is due to

JEE MAIN 2002 CHEMISTRY):-

In mixture A and B component show -ve deviation as

JEE MAIN 2002 CHEMISTRY):-

β - particle is emitted in radioactivity by

JEE MAIN 2002 CHEMISTRY):-

A heat engine absorbs heat Q1 at temperature T1 and heat Q2 at temperature T2 . Work done by the engine is J (Q1 + Q2). This data

JEE MAIN 2002 CHEMISTRY):-

Which of the following reaction is possible at anode?

(1) 2Cr³⁺ + 7H₂O → Cr₂O²⁻₇ + 14H⁺

(2) F₂ → 2 F⁻

(3) (1/2)O₂ + 2H⁺ → H₂O

(4) none of these

JEE MAIN 2002 CHEMISTRY):-

The differential rate law for the reaction H₂ + I₂ → 2HI is

(1) − d[H₂]/dt = − d[I₂]/dt = − d[HI]/dt

(2) d[H₂]dt = d[I₂]/dt = ½ 1d[Hl]/dt

(3) ½ d[H₂]/dt = ½ 2d[I₂]/dt = − d[HI]/dt

(4) −2 d[H₂]/dt = −2 d[I₂]/dt = d[HI]/dt

JEE MAIN 2002 CHEMISTRY):-

Conductivity (unit Siemen’s S) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then the unit of the constant of proportionality is

(1) Sm mol⁻¹

(2) Sm² mol⁻¹

(3) S⁻² m² mol

(4) S² m² mol⁻²

JEE MAIN 2002 CHEMISTRY):-

Number of atoms in 558.5 gram Fe (at.wt. of = 55.85 g mol⁻¹

) is

JEE MAIN 2002 CHEMISTRY):-

Most common oxidation states of Ce (cerium) are

JEE MAIN 2002 CHEMISTRY):-

In which of the following species the interatomic bond angle is 109∘28′?

JEE MAIN 2002 CHEMISTRY):-

Which of the following compounds has wrong IUPAC name ?

(1) CH3​–CH2​–CH2​–COO–CH2​CH3 -ethyl butanoate

(2) CH₃​–CH- CH₂- CH ​–CHO - 3-methyl butanal

(3) CH₃​–CH-(OH)–CH-(CH₃​)–CH₃​- 2-methyl-3-butanol

(4) CH₃​–CH-(CH₃​)–C=O–CH₂​–CH₃​- 2-methyl-3-pentanone

JEE MAIN 2002 CHEMISTRY):-

Change in volume of the system does not alter the number of moles in which of the following equilibria ?

(1) N2( g) + O2( g) ⇌ 2NO(g)

(2) PCl5( g) ⇌ PCl3( g) + Cl2( g)

(3) N2( g) + 3H2( g) ⇌ 2NH3( g)

(4) SO2Cl2( g) ⇌ SO2( g) + Cl2( g)

JEE MAIN 2002 CHEMISTRY):-

Polymer formation from monomers starts by

JEE MAIN 2002 CHEMISTRY):-

KO₂ (potassium super oxide) is used in oxygen cylinders in space and submarines because it

(1) absorbs CO₂ and increases O₂ content

(2) eliminates moisture

(3) absorbs CO₂

(4) produces ozone.

JEE MAIN 2002 CHEMISTRY):-

When H₂ S is passed through Hg₂ S we get

(1) HgS

(2) HgS + Hg₂ S

(3) Hg₂ S

(4) Hg₂ S₂

JEE MAIN 2002 CHEMISTRY):-

With increase of temperature, which of these changes?

JEE MAIN 2002 CHEMISTRY):-

Cyanide process is used for the extraction of

JEE MAIN 2002 CHEMISTRY):-

The heat required to raise the temperature of body by 1 K is called

JEE MAIN 2002 CHEMISTRY):-

Units of rate constant of first and zero order reactions in terms of molarity M unit are respectively

(1) sec⁻¹, Msec⁻¹

(2) sec⁻¹, M

(3) Msec^-1, sec⁻¹

(4) M, sec⁻¹

JEE MAIN 2002 CHEMISTRY):-

1 M NaCl and 1 M HCl are present in an aqueous solution. The solution is

JEE MAIN 2002 CHEMISTRY):-

In which of the following species is the underlined carbon having sp³ hybridization ?

(1) CH₃​COOH.

(2) CH₃​CH₂​OH.

(3) CH₃​COCH₃

(4) CH₂​=CH−CH₃

JEE MAIN 2002 CHEMISTRY):-

Which of the following are arranged in an increasing order of their bond strengths ?

(1) O⁻₂ < O₂ < O⁺₂ < O²₋

(2) O²⁻₂ < O⁻₂ < O² < O⁺₂

(3) O⁻₂ < O²⁻₂ < O² < O⁺₂

(4) O⁺₂ < O² < O⁻₂ < O²₋

(JEE MAIN 2002 CHEMISTRY):-

At a specific instant emission of radioactive compound is deflected in a magnetic field. The compound can emit (i) electrons (ii) protons (iii) He²⁺ (iv) neutrons The emission at instant can be

JEE MAIN 2002 CHEMISTRY):-

Which of the following is a redox reaction ?

(1) NaCl + KNO₃ → NaNO₃ + KCl

(2) CaC₂O₄ + 2HCl → CaCl₂ + H₂C₂O₄

(3) Mg(OH)₂ + 2NH₄Cl → MgCl₂ + 2NH₄OH

(4) Zn + 2AgCN → 2Ag + Zn(CN)₂

JEE MAIN 2002 CHEMISTRY):-

A square planar complex is formed by hybridisation of which atomic orbitals ?

(1) s, p_x, p_y, d_yz

(2) s, p_x, p_y, d_x2−y2

(3) s, p_x, p_y, d_z²

(4) s, p_y, p_z, d_xy

JEE MAIN 2002 CHEMISTRY):-

Kinetic theory of gases proves

JEE MAIN 2002 CHEMISTRY):-

If N₀ is the original mass of the substance of half- life period t_1/2 = 5 years, then the amount of substance left after 15 years is

JEE MAIN 2002 CHEMISTRY):-

Which of the following statements is true ?

JEE MAIN 2002 CHEMISTRY):-

In a compound C, H and N atoms are present in 9 : 1 : 35 by weight. Molecular weight of compound is 108. Molecular formula of compound is

JEE MAIN 2002 CHEMISTRY):-

When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are

JEE MAIN 2002 CHEMISTRY):-

If half-life of a substance is 5 yrs, then the total amount of substance left after 15 years, when initial amount is 64 grams is

JEE MAIN 2002 CHEMISTRY):-

If mass-energy equivalence is taken into account, when water is cooled to form ice, the mass of water should

JEE MAIN 2002 CHEMISTRY):-

When KMnO⁴ acts as an oxidising agent and ultimately forms [MnO4]⁻¹, MnO₂, Mn₂O₃,Mn⁺²

then the number of electrons transferred in each case respectively is

JEE MAIN 2002 CHEMISTRY):-

Cl_{2             alc. KOH}

CH₃CH₂COOH   ⟶     A     ⟶        B. What is B ?

red P

(1) CH₃CH₂COCl

(2) CH₃CH₂CHO

(3) CH₂ = CHCOOH

(4) ClCH₂CH₂COOH

JEE MAIN 2002 CHEMISTRY):-

The energy band gap is maximum in

JEE MAIN 2002 CHEMISTRY):-

The functional group, which is found in amino acid is

(1) COOH GROUP

(2) NH_{2 GROUP}

(3) CH_{3 GROUP}

(4) both (a) and (b)

JEE MAIN 2002 CHEMISTRY):-

In XeF₂, XeF₄, XeF₆ the numebr of lone pairs of Xe are respectively

JEE MAIN 2002 CHEMISTRY):-

How do we differentiate between Fe³⁺ and Cr³⁺ in group III?

(1) by taking excess of NH₄OH solution

(2) by increasing NH₄ ⁺ ion concentration

(3) by decreasing OH⁻ ion concentration

(4) both (b) and (c)

JEE MAIN 2002 CHEMISTRY):-

A similarity between optical and geometrical isomerism is that

JEE MAIN 2002 CHEMISTRY):-

Which of the following ions has the maximum magnetic moment ?

(1) Mn⁺²

(2) Fe⁺²

(3) Ti⁺²

(4) Cr⁺²

JEE MAIN 2002 CHEMISTRY):-

Number of sigma bonds in P₄O₁₀ is

JEE MAIN 2002 CHEMISTRY):-

Aluminium is extracted by the electrolysis of

JEE MAIN 2002 CHEMISTRY):-

When primary amine reacts with chloroform in ethanoic KOH then the product is

JEE MAIN 2002 CHEMISTRY):-

Arrange Ce⁺³, La⁺³, Pm⁺³ and Yb⁺³ in increasing order of their ionic radii

(1) Yb⁺³ < Pm⁺³ < Ce⁺³ < La⁺³

(2) Ce⁺³ < Yb⁺³ < Pm⁺³ < La⁺³

(3) Yb⁺³ < Pm⁺³ < La⁺³ < Ce⁺³

(4) Pm⁺³ < La⁺³ < Ce⁺³ < Yb⁺³

JEE MAIN 2002 CHEMISTRY):-

CH₃ −Mg − Br is an organo metallic compound due to

JEE MAIN 2002 CHEMISTRY):-

Species acting as both Bronsted acid and base is

(1) (HSO4)⁻¹

(2) Na₂CO₃

(3) NH₃

(4) OH⁻¹

JEE MAIN 2002 CHEMISTRY):-

Arrangement of (CH₃)₃ − C−, (CH₃)₂ − CH−,CH₃ − CH₂ - when attached to benzyl or an unsaturated group in increasing order of inductive effect is

(1) (CH₃)₃ − C− < (CH₃)₂ − CH− < CH₃ − CH₂

(2) CH₃ − CH₂− < (CH₃)₂− < CH− < (CH₃)₃ − C−

(3) (CH₃)₂ − CH− < (CH₃)₃ − C− < CH₃,−CH₂

(4) (CH₃)₃ − C− < CH₃ − CH₂ − (CH₃)₂ − CH−

JEE MAIN 2002 CHEMISTRY):-

Which of these will not react with acetylene ?

(1) NaOH

(2) ammonical AgNO₃

(3) Na

(4) HCl

JEE MAIN 2002 CHEMISTRY):-

The formation of gas at the surface of tungsten due to adsorption is the reaction of order

JEE MAIN 2002 CHEMISTRY):-

The type of isomerism present in nitropentamine chromium (III) chloride is

JEE MAIN 2002 CHEMISTRY):-

H₂O

The reaction: (CH₃)₃ C – Br      ⟶       (CH₃)₃ − C − OH

JEE MAIN 2002 CHEMISTRY):-

Value of gas constant R is

(1) 0.082 litre atm

(2) 0.987cal mol⁻¹ K⁻¹

(3) 8.3 J mol⁻¹ K⁻¹

(4) 83 erg mol⁻¹ K⁻¹

JEE MAIN 2002 CHEMISTRY):-

For the reactions, C + O₂⟶CO₂; ΔH = −393 J 2Zn + O₂⟶2ZnO; ΔH = −412 J

JEE MAIN 2002 CHEMISTRY):-

If ϕ denotes reduction potential, then which is true ?

(1) E⁰_cell = ϕ_right − ϕ_left

(2) E⁰_cell = ϕ_{left +} ϕ_right

(3) E⁰_cell = ϕ_{left -} ϕ_right

(4) E⁰_cell = -(ϕ_{left +} ϕ_right )

JEE MAIN 2002 CHEMISTRY):-

For an ideal gas, number of moles per liter in terms of its pressure P, gas constant R and temperature T is

(JEE MAIN 2002 CHEMISTRY):-

If 13.6eV energy is required to ionize the hydrogen atom, then the energy required to remove an electron from n = 2 is

JEE MAIN 2002 CHEMISTRY):-

What will be the emf for the given cell Pt |H2 (P1)|H+(aq)||H2 (P2) ∣ Pt

(1) RT/f  log P1/P2

(2) RT/2f  log P1/P2

(3) RT/f  log P2/P1

(4) none of these

JEE MAIN 2002 CHEMISTRY):-

Alum helps in purifying water by

JEE MAIN 2002 CHEMISTRY):-

The most stable ion is

(1) [Fe(OH)₃]³⁻

(2) [Fe(Cl)₆]³⁻

(3) [Fe(CN)₆]³⁻

(4) [Fe(H₂O)₆]³⁺

JEE MAIN 2002 CHEMISTRY):-

On vigorous oxidation by permanganate solution

(CH₃)₂C = CH − CH₂ − CHO gives

JEE MAIN 2002 CHEMISTRY):-

Which is the correct order of ionic sizes ? (Atomic Number : Ce = 58, Sn = 50, Yb = 70 and Lu = 71)

JEE MAIN 2002 CHEMISTRY):-

The compound is used as

(JEE MAIN 2002 CHEMISTRY):-

Formation of covalent bonds in compounds exhibits

JEE MAIN 2002 CHEMISTRY):-

For the reaction CO(g) + (1/2)O₂( g) = CO₂( g),K_p/K_c is

JEE MAIN 2002 CHEMISTRY):-

EMF of a cell in terms of reduction potential of its left and right electrodes is

(1) E = E_left − E_right

(2) E = E_left + E_right

(3) E = E_right − _Eleft

(4) E = −(E_right + E_left )

JEE MAIN 2002 CHEMISTRY):-

Let the solubility of an aqueous solution of Mg(OH)₂ be x then its k_sp is

(1) 4 x³

(2) 108 x⁵

(3) 27 x⁴

(4) 9x