Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

Which of the following carbonyl will have the strongest C- O bond? 

  • (Mn(CO)6+

  • Cr(CO)6

  • V (CO)6-

  • V (CO)6-

1472 Views

12.

The rate of reaction 2N2O3 → 4 NO2 + O2 can be written in three ways

fraction numerator negative straight d left square bracket straight N subscript 2 straight O subscript 5 right square bracket over denominator dt end fraction space equals space straight k space left square bracket straight N subscript 2 straight O subscript 5 right square bracket

fraction numerator straight d left square bracket NO subscript 2 superscript 7 right square bracket over denominator dt end fraction space equals space k apostrophe left square bracket N subscript 2 O subscript 5 right square bracket

fraction numerator straight d left square bracket straight O subscript 2 right square bracket over denominator dt end fraction space equals space straight k apostrophe apostrophe space left square bracket straight N subscript 2 straight O subscript 5 right square bracket

The relationship between k and k' and between k and k'' are 

  • k' = 2k ; k' = k

  • k' = 2k; k" = k/2

  • k' = 2k; k' = 2k

  • k' = 2k; k' = 2k

372 Views

13.

A solid compound XY has NaCl structure. If the radius of the cation is 100 pm, the radius of the anion (Y-) will be 

  • 275.1 pm

  • 322.5 pm

  • 241.5 pm

  • 241.5 pm

621 Views

14.

A solution contains Fe2+ Fe3+, and I- ions. This solution was treated with iodine at 35o C.Eo for Fe3+/ Fe2+ is +0.77 V and Eo for I2/ 2 I- = 0.536 V. The favourable redox reaction is 

  • I2 will be reduced to I-

  • There will be No redox reaction

  • I- will be oxidised to I2

  • I- will be oxidised to I2

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15.

The unit of rate constant for a zero order reaction is 

  •  mol L-1 s-1

  • L mol-1 s-1

  • L2 mol-2 s-1

  • L2 mol-2 s-1

300 Views

16.

Which of the following oxide is amphoteric?

  • SnO2

  • CaO2

  • SiO2

  • SiO2

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17.

200 mL of an aqueous solution of a protein contains its 1.26 g . The osmotic pressure of this solution at 300 K is found to be  2.57 x 10-3 bar. The molar mass of protein will be (R = 0.083 L bar mol-1 K-1)

  • 51022 g mol-1

  • 122044 g mol-1

  • 31011 g mol-1

  • 31011 g mol-1


D.

31011 g mol-1

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18.

In qualitative analysis, the metals of group I can be separted from other ions by precipitating them as chloride salts. A solution initially contains Ag+ and Pb2+ at a concentration of 0.10 M. Aqueous HCl is added to this solution until the Cl- concentration is 0.10 M. What will be the concentration of Ag+ and Pb2+ be at equilibrium? (Ksp for AgCl = 1.8 x 10-10, Ksp for PbCl2  = 1.7 x 10-5)

  • [Ag+]  = 1.8 x 10-7 M; [Pb2+] = 1.7 x 10-6 M

  • [Ag+]  = 1.8 x 10-11 M; [Pb2+] = 8.5 x 10-5 M

  • [Ag+]  = 1.8 x 10-9 M; [Pb2+] = 1.7 x 10-3 M

  • [Ag+]  = 1.8 x 10-9 M; [Pb2+] = 1.7 x 10-3 M

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19.

The pair of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description?

  • straight O subscript 2 superscript minus comma space straight O subscript 2 superscript 2 minus end superscript space minus space Both space diamagnetic
  • straight O to the power of plus comma space straight O subscript 2 superscript 2 minus end superscript space minus space Both space Paramagnetic
  • straight O subscript 2 superscript plus comma space straight O subscript 2 superscript space space minus space Both space paramagnetic
  • straight O subscript 2 superscript plus comma space straight O subscript 2 superscript space space minus space Both space paramagnetic
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20.

The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag.

  • Fe2O3 (s) + 3CO (g) → 2 Fe (l) +3CO2 (g)

  • CaCO3 (s) → CaO (s) + CO2 (g)

  • CaO (s) +SiO2 → CaSiO3 (s)

  • CaO (s) +SiO2 → CaSiO3 (s)

434 Views

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