Dpmt 2007 Chemistry

DPMT - 2007 (Memory Based) CHEMISTRY COOH

1.

Number of σ and π-bonds in

(1) 15

acid

(2) 10

(3) 12

(4) 13

Sol: Ans [1] 2.

Number of isomers for molecular formula C6 H5 Cl3 will be (1) 3

(2) 2

(3) 1

(4) 5

(3) CH3 CH2 NH2

(4) CH3 CH2 CH2 CN

Sol: Ans [1] 3.

P2 O 5 / ∆ CH3 CH2 COONH4   → ?

(1) CH3 CH2 CN

(2) CH3 CH2 CONH2

Sol: Ans [1] CH 3

CH3 NaNO 2 HCl

4. Br

CH 3 X

Br

NH 2

(1) H3 PO2

. ‘X’ is Br

+

–

N2 Cl

(2) H3 PO3

(3) H3 PO4

(4) (HPO3 )3

Sol: Ans [1] 5.

Which of the following gives HCHO on ozonolysis? (1) CH3 CH=CHCH3

(2) CH3 CH2 CH=CH2 (3) both (1) & (2)

(4) none of these

Sol: Ans [2] 6.

Which one is the binary compound? (1) H2 SO4

(2) HNO3

(3) H2 O

(4) H2 CO3

Sol: Ans [3] 7.

[Co(NH3 )3 Cl]Cl2 in aqueous solution will give how many numbers of ion (1) 2

(2) 3

(3) 4

(4) 7

Sol: Ans [2]

Amity Institute for Competitive Examinations : Phones: 24336143/44, 25573111/2/3/4, 95120-2431839/42 -1-

Chemistry

8.

DPMT-2007 (Memory Based)

Which one is the correct formula of superoxide of K? (1) K2 O

(2) K2 O2

(3) KO2

(4) none of these

Sol: Ans [3] 9.

Among the following which one is optically inactive amino acid? (1)

(2)

(3) Glycine

(4)

(3) both (1) & (2)

(4) none of these

(3) 16

(4) 32

(3) CV

(4) W

Sol: Ans [3] 10. Which one represents addition polymer of propene C

(1) –(CH3 CH–CH2 )n – (2)

C

C C C C n

Sol: Ans [2] 11.

For n = 4, how many will be the number of orbitals (1) 4

(2) 8

Sol: Ans [3] 12. Which of the following is state function? (1) ∆H

(2) P∆V

Sol: Ans [1] 13. | ψ2 | = 0 represents (1) probability of finding electron minimum (2) probability of finding electron maximum (3) probability of finding electron maximum along x-axis (4) nodal point Sol: Ans [4] 14. For a particular reaction unit of rate constant k = l2 mol–2 sec–1 , overall order of this reaction will be (1) 1

(2) 2

(3) 3

(4) 4

Sol: Ans [3] 15. Which is essential condition for Heterogence catalysis? (1) Absorption

(2) Adsorption

(3) Diffusion

(4) Solution

Sol: Ans [2] 16. Isopyknic stands for (1) substances having equal density

(2) solutions having equal concentration

(3) solutions having equal osmotic pressure

(4) solutions having equal mole fraction of solute

Sol: Ans [1] Amity Institute for Competitive Examinations : Phones: 24336143/44, 25573111/2/3/4, 95120-2431839/42 -2-

DPMT-2007 (Memory Based)

Chemistry

17. If SiO 2 is treated with X it gives Y as product, then X and Y are (1) X = HF, Y = H2 SiF6

(2) X = HF, Y = SiF4

(3) X = HF, Y = SiF2

(4) X = HF, Y = SiF6

Sol: Ans [1] 18. 0.5 g mixture of NaHCO3 and Na2 CO3 titrated with HCl. The change of colour of indicator appears at pH 9 and at pH 5, the reaction corresponding pH 9 will be as (1) CO3 2– + HCO3 – → 2CO2 + H2 O + 3e (2) HCO3 – + H+ → H2 O + CO2 (3) CO3 2– + 2H+ → H2 CO3 (4) CO3 2– + H+ → HCO3 – Sol: Ans [4] 19. What is the correct formula of Ammonium Magnate (1) (NH4 )2 MnO4

(2) NH4 MnO4

(3) (NH4 )3 MnO2

(4) NH4 MnO2

(2) NaO–

(3) Na–

(4) H2

Sol: Ans [2] 20. NaH in water gives (1) H+ Sol: Ans [4] 21. ∆H = 30 kJ and ∆S = +3 J, then beyond which temperature reaction will be spontaneous (1) 10000 K

(2) 100 K

(3) 1000 K

(4) 273 K

Sol: Ans [1] 22.

IO3 – + SO 2 + 4H2 O → I2 + SO 4 2– + 8H+ What is the stoichiometric coefficient of SO 2 in balance chemical equation. (1) 4

(2) 8

(3) 5

(4) 2

(3) 2

(4) 3

Sol: Ans [3] 23. How many covalent bonds are in NaH (1) 0

(2) 1

Sol: Ans [1] 24. Radius of Ag is 144 pm it crystalises in f.c.c. (c.c.p.). What is the density of Ag in g/cc? (1) 11

(2) 16

(3) 6

(4) 21

(2) allotropes

(3) isotones

(4) isobars

Sol: Ans [1] 25. SX and S8 are (1) isotropes Sol: Ans [2] Amity Institute for Competitive Examinations : Phones: 24336143/44, 25573111/2/3/4, 95120-2431839/42 -3-

Chemistry

26.

238

DPMT-2007 (Memory Based)

U captures neutron and emit 2 successive β-particles, the product is

(1)

239

Pu

(2)

239

U

(3)

238

Th

(4)

239

Np

Sol: Ans [1] 27. Which is the polar species among the following? (1) XeF4

(2) PF3

(3) I3 –

(4) BF3

(3) Alcohol

(4) Carboxylic acid

Sol: Ans [2] 28. Which does not have sp2 hybridized C? (1) Aldehyde

(2) Ketone

Sol: Ans [3] 29. The correct increasing bond order of CO-bond is as (1) HCHO < CH3 OH < HCO2 –

(2) CH3 OH < HCHO < HCO2 –

(3) CH3 OH < HCO2 – < HCHO

(4) HCHO < HCO2 – < CH3 OH

Sol: Ans [3] 30. NaClO turns blue litmus paper under dehydrated conditions (1) red

(2) yellow

(3) orange

(4) no change

Sol: Ans [4] 31. N2 O5 → 2NO2 + (1/2)O2 , differential rate expression for this equation is (1)

d d d [N 2 O5 ] = [NO 2 ] = 2 [O 2 ] dt dt dt

(3)

−

d d d [N 2O 5 ] = [NO 2 ] = 2 [O 2 ] dt dt dt

d 1 d d [N 2 O5 ] = [NO 2 ] = 2 [O 2 ] dt 2 dt dt

(2)

−

(4)

d d d [N 2 O5 ] = [NO 2 ] = [O2 ] dt dt dt

Sol: Ans [2] 32.

A + B → AB(fast), AB + B → C + D(Slow) Rate law expression for this reaction will be as (1) rate = k[A][B]2

(2) rate = k[A]2 [B]

(3) rate = k[A][B]

(4) rate = k[A]3 [B]

Sol: Ans [1] 33. Absolute vapour pressure of dichloroethane and dichloropropane are 183 mm of Hg and 123 mm of Hg respectively. When they are mixed in the molar ratio of 2 : 1. Vapour pressure of the solution made will be (1) 163 mm of Hg

(2) 162.5 mm of Hg

(3) 164 mm of Hg

(4) 165 mm of Hg

Sol: Ans [1]

Amity Institute for Competitive Examinations : Phones: 24336143/44, 25573111/2/3/4, 95120-2431839/42 -4-

DPMT-2007 (Memory Based)

Chemistry

Me

34. IUPAC name of C

C C C C C is eth

OH

(1) 3-ethyl-4-methylhex-5-en-2-ol

(2) 3-ethyl-4-methylhex-1-en-2-ol

(3) 4-ethyl-3-methylhex-2-ol-5-en

(4) 4-ethyl-3-methylhex-5-en-2-ol

Sol: Ans [4] 35. Which one has different type of linkage between the two monosaccharides? (1) Sucrose

(2) Lactose

(3) Maltose

(4) Amylose

Sol: Ans [3] 36. Number of geometrical isomers for the following structure H CH3 CH 2 C

(1) 2

H

H CH3 CH3

C CH 2 C C

(2) 3

will be (3) 4

(4) 5

Sol: Ans [1] 37. 1 g CaCO3 decomposes by 11% as the given chemical reaction in a 5 litre vessel at 27ºC CaCO3 → CaO + CO2 , what will be its Kp (1) 0.054 atm

(2) 0.54 atm

(3) 5.4 atm

(4) None of these

Sol: Ans [1] 38. 25 g sample of a compound MCl4 liberates 0.5 mole of Cl2 . Molecular weight will be (1) 10

(2) 100

(3) 1000

(4) 110

Sol: Ans [2] 39. Solubility of BaSO 4 in water is X g/ltr, if solubility product constant for BaSO 4 is Ksp then relation between X and Ksp will be (At. wt. of Ba = 137, S = 32, O = 16) (1) X =

K sp

(2) X/233 =

K sp

(3) X/233 = Ksp

(4) X = Ksp

Sol: Ans [2] 40. For the reaction N2 + 3H2 (1) increase of NH3

2NH3 + energy, increase of temperature will result into

(2) increase of N2

(3) decrease of N2

(4) decrease of H2

Sol: Ans [2]

bacd

Amity Institute for Competitive Examinations : Phones: 24336143/44, 25573111/2/3/4, 95120-2431839/42 -5-