CHEMISTRY 11th TEST -2

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1, 7.5 grams of a gas occupy 5.6 litres of volume at STP. The gas is *

4 points

(a) NO

(b) N2O

(d) CO2

2, Number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is *

4 points

(a) 6.023 × 1019

(b) 1.084 × 1018

(d) 6.023 × 1023

3, The weight of a molecule of the compound C60H22 is *

4 points

(a) 1.4 × 10-21 g

(b) 1.09 × 10-21 g

(d) 16.023 × 1023 g

4, The wavelength associated #vith a golf ball weighing 200 g and moving at a speed of 5 m/h is of the order *

4 points

(a) 10-10 m

(b) 10-20 m

(d) 10-40 m

5, The electronic configuration of an element is 1s² 2s² 2p6 3s² 3p6 3d5 4s1. It represents

4 points

(a) excited state

(b) cationic states

(d) anionic state

Clear selection

6, Azimuthal quantum number determines the

4 points

(a) size

(b) spin

(d) angular momentum of orbitals

Clear selection

7, The electronic configuration of Cu2+ ion is *

4 points

(a) [Ar] 4s1 3d8

(b) [Ar] 4s² 3d10 4p1

(d) [Ar] 3d9

8, The total number of orbitals in a shell having principal quantum n is *

4 points

(a) 2n

(b) n²

(d) (n + 1)

9, The line spectrum of hydrogen obtained in the visible region of light corresponds to *

4 points

(a) Lyman series

(b) Balmer series

(d) Brackett series

10, The set representing the correct order of first ionization potential is *

4 points

(a) K > Na > Li

(b) Be > Mg > Ca

(d) Ge > Si > C.

11, The increasing order of the atomifc radius for the elements Na, Rb, K and Mg is *

4 points

(a) Na < K < Mg < Rb

(b) K < Na < Mg < Rb

(d) Mg < Na < K < Rb

12, The correct’ order of the first ionization potentials among the following elements: Be, B, C, N Q is *

4 points

(a) B < Be < C < O < N

(b) B < Be < C < N < O

(d) Be < B < C < O < N

13, Correct order of radii is *

4 points

(a) N < Be < B

(b) F– < O2- < N3-

(d) Fe3+ < Fe2+ < Fe4+

14, Which of the following represents most electropositive element? *

4 points

(a) [He]2s1

(b) [He]2s²

(d) [Xe]6s²

15,Total number of elements present in the 3rd period is *

4 points

(a) 6

(b) 32

(d) 8

16, Which of the following are iso-structural? *

4 points

(a) XeF2, IF~2

(b) NH3, BF3

(d) PCl5, ICl5

17, Which of the following are isoelectronic and iso-structural NO−3, CO2−3, CIO−3, SO3

4 points

(a) NO−3,CO2−3

(b) SO3, NO−3

(d) none

Clear selection

18,The correct order of hybridisation of the central atom in the following species: NH3, [PtCl4]2-, PCl5 and BCl3 is *

4 points

(a) dsp², dsp³, sp² and sp³

(b) sp³, dsp², dsp³, sp²

(d) dsp², sp³, sp², dsp³

19, Amongst H2O, H2S, H2Se and H2Te the one with the highest boiling point is

4 points

(a) H2O because of hydrogen bonding

(b) H2Te because of higher molecular weight

(d) H2Se because of lower molecular weight.

Clear selection

20, Number of π bonds in Naphthalene is *

4 points

(a) 6

(b) 3

(d) 5

21, Which of the following exhibits the weakest molecular forces? *

4 points

(a) NH3

(b) HCl

(d) H2O

22, Which one of the following statement is false?

4 points

(a) Work is a state function

(b) Temperature is a state function

(d) Work appears at the boundary of the system

Clear selection

23, For the reaction C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(I) at constant temperature ∆H – ∆E is *

4 points

(a) + RT

(b) – 3RT

(d) -RT

24, The heat required to raise the temperature of a body by 1 K is called *

4 points

(a) Specific heat

(b) Thermal capacity

(d) Molar heat capacity

25,In which of the following process, the process is always non-feasible? *

4 points

(a) ∆H > 0, ∆S > 0

(b) ∆H < 0, ∆S > 0

(d) ∆H < 0, ∆S < 0

26, Internal energy does not include *

4 points

(a) Nuclear energy

(b) Vibrational energy

(d) Energy of gravitational pull

27, For the chemical reaction3X (g) + Y (g) ⇌ X3Y (g)the amount of X3Y at equilibrium is affected by *

4 points

(a) Temperature and pressure

(b) Pressure only

(d) Temperature, pressure and catalyst.

28, In which manner, the increase of the pressure will affect the following equilibrium?C(s) + H2O (g) ⇌ CO (g) + H2 (g) *

4 points

(a) Shifts in the forward direction

(b) Shifts in the reverse direction

(d) No effect

29, The oxidation of sulphur in the anions SO2−3, S2O2−4 and S2O2−6 follow the order *

4 points

(a) S2O2−4 < SO23 < S2O26

(b) SO2−3 < S2O2−4 < S2O2−6

(d) S2O26 < S2O2−4 < SO2−3

30, Which of the following is a redox reaction? *

4 points

(a) NaCl + KNO3 → NaNO3 + KCl

(b) CaC2O4 + 2HCl → CaCl2 + H2C2O4

(d) Zn + 2AgCN → 2Ag + Zn (CN)2

31, When KMnO4 acts as an oxidising agent and ultimately forms MnO2−4, MnO2, Mn2O3 and Mn2+ then the no. of electrons transferred in each case respectively is *

4 points

(a) 4, 3, 1, 5

(b) 1, 5, 3, 7

(d) 3, 5, 7, 1

32, The oxidation number of iron in Fe3O4 is *

4 points

(a) +2

(b) +3

(d) 2/3

33, Which is a redox reaction?

4 points

(a) H2SO4 + 2NaOH → Na2SO4 + 2H2O

(b) BaCl2 + H2SO4 → BaSO4 + 2HCl

(d) 2FeCl3 + SnCl2 → 2FeCl2 + SnCl4

Clear selection

34, Oxidation state of osmium (Os) in OsO4 is *

4 points

(a) +7

(b) + 6

(d) + 8

35, Action of water or dilute mineral acids on metals can give *

4 points

(a) Mono hydrogen

(b) Tritium

(d) Trihydrogen

(e) D2

36, The structure of H2O is *

4 points

(a) Planar

(b) Non-planar

(d) Linear

37,What is heavy water? *

4 points

(a) H182C

(b) H162C

(d) D2O

38, Which of the following is a true peroxide? *

4 points

(a) NO2

(b) MnO2

(d) SO2

39, The substance not likely to contain CaCO3 is

4 points

(a) Dolomite

(b) A marble

(d) Sea shells.

Clear selection

40, The active constituent of bleaching powder is *

4 points

(a) Ca(OCl)2

(b) Ca(OCl)Cl

(d) Ca(ClO2)Cl

41, Which of the following is not a protonic acid?

4 points

(a) B(OH)3

(b) PO(OH)3

(d) SO2(OH)2

Clear selection

42, I.U.P.A.C. name of 4-isopropyl-m-xylene is *

4 points

(a) l-Isopropyl-2, 4-Dimethyl benzene

(b) 4-Iso propyl-m-Xylene

(d) 4-Isopropyl-3, 5-Dimethyl benzene.

43, The name of reaction is *

4 points

(a) Elimination reaction

(b) Substitution reaction

(b) Addition reaction

44, The I.U.P.A.C. name of *

4 points

(a) 3-Methyl cyclohexene

(b) 1-methyl cylohex-2-ene.

(d) 1-methyl cyclohex5-ene.

45, The I.U.P.A.C. name of CH3COCH(CH3)2 is *

4 points

(a) 3-methyl-2-butanone

(b) Isopropyl methyl ketone

(d) 4-methyl isopropyl ketone

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