Class/Course - Class XI

Subject - Chemistry

Total Number of Question/s - 6390

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  • 1. Some Basic Concepts of Chemistry - Quiz

    1. 1 mm Hg represents a pressure of
    a) 101.3 N m-2
    b) 1013 N m-2
    c) 133.3 N m-2
    d) 1333 N m-2

    2. What volume of hydrogen gas at 273 K and 1 atm pressure will be consumed in obtaining 21.6 g elemental boron (atomic mass = 10.8) from the reduction of boron trichloride by hydrogen?
    a) 67.2 L
    b) 44.8 L
    c) 22.4 L
    d) 89.6 L

  • 2. Structure of Atom - Quiz

    1. In an atom, an electron is moving with a speed of 600 m/s with an accuracy of 0.005%, Certainty with which the position of the electron can be located is (h = 6.6 x 10-34 kg m2 s-1, mass of electron, m2 = 9.1 x 10-31 kg)
    a) 1.52 x 10-4 m
    b) 5.10 x 10-3 m
    c) 1.92 x 10-3 m
    d) 3.84 x 10-3 m

    2. The radius of the second Bohr orbit for Li2+ is
    a) 0.529 $\times \frac{4}{3}$ Å
    b) 0.529 $\times \frac{2}{3}$ Å
    c) 0.529 $\times \frac{4}{9}$ Å
    d) 0.529 $\times \frac{2}{9}$ Å

  • 3. Classification of Elements and Periodicity in Properties - Quiz

    1. Which of the following oxides is neutral?
    a) SiO2
    b) CO
    c) ZnO
    d) SnO2

    2. Among the following the third ionization energy is highest for
    a) Magnesium
    b) Boron
    c) Beryllium
    d) Aluminium

  • 4. Chemical Bonding and Molecular Structure - Quiz

    1. Which of the following statement is correct?
    a) FeCl2 is more covalent that FeCl3
    b) FeCl3 is more covalent than FeCl2.
    c) Both FeCl2 and FeCl3 equally covalent
    d) FeCl2 and FeCl3 do not have any covalent character

    2. The common features among the species CN- CO and NO+ are
    a) Bond order three and isoelectronic
    b) Bond order three and weak-field ligands
    c) Bond order two and π-acceptor
    d) Isoelectronic and weak-field ligands

  • 5. States of Matter - Quiz

    1. At what temperature, the rms velocity of a gas shown at 500 C will be doubled?
    a) 626 K
    b) 1019 K
    c) 2000 C
    d) 10190 C

    2. 500mL of nitrogen at 270C is cooled to -50C at the same pressure. The new volume becomes
    a) 326.32mL
    b) 446.66 mL
    c) 546.32mL
    d) 771.56mL

  • 6. Thermodynamics - Quiz

    1. ΔE is always positive when
    a) System absorbs heat and work is done on it
    b) System emits heat and work is done on it
    c) System emits heat and no work is done on it
    d) System absorbs heat and work is done by it

    2. If 150 kJ of energy is needed for muscular work to walk a distance of one km, then how much of glucose one has to consume to walk a distance of five km, provided only 30% energy is available for muscular work. The enthalpy of combustion of glucose is 3000 kJ mol-1
    a) 75 g
    b) 30 g
    c) 180 g
    d) 150 g

  • 7. Equilibrium - Quiz

    1. The correct order of acidity for the following is

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

  • 8. Redox Reactions - Quiz

    1. A mole of N2H4 loses 10 mol of electrons to form a new compound Y. Assuming that all the nitrogen appears in the new compound, what is the oxidation state of nitrogen in Y. (There is no change in the oxidation number of hydrogen)
    a) -1
    b) -3
    c) +3
    d) +5

    2. The oxidation state of iodine in $H_{4}IO_{6}^{\circleddash }$ is
    a) +7
    b) -1
    c) +5
    d) +1

  • 9. Hydrogen - Quiz

    1. An orange coloured solution acidified with H2SO4 and treater with a substance X gives a blue coloured solution of CrO5. The substance X is
    a) H2O2
    b) H2O
    c) dil HCl
    d) conc HCl

    2. H2O2 reduces KMnO4 solution only in the alkaline medium.
    a) True
    b) False

  • 10. The s-Block Elements - Quiz

    1. Be resembles more with Al than with Mg.
    a) True
    b) False

    2. The hydration energy og Mg2+ is greater than that of
    a) Al3+
    b) Na+
    c) Be2+
    d) Mg3+

  • 11. The p-Block Elements - Quiz

    1. The element which exists in liquid state for a wide range of temperature and can be used for measuring high temperature is
    a) B
    b) Al
    c) Ga
    d) In

    2. The chief impurity present in bauxite is
    a) SiO2
    b) Fe2O3
    c) K2SO4
    d) NaF

  • 12. Organic Chemistry – Some Basic Principles and Techniques - Quiz

    1. Which one of the following compounds cannot show tautomerism?

    2. C2H5NO2 shows both tautomerism and functional isomerism.
    a) True
    b) False

  • 13. Hydrocarbons - Quiz

    1. o-Xylene on reductive ozonolysis gives __________, ____________ and  ____________.
    a) Glyoxal, methylglyoxal, 1, 2-dimethylglyoxal
    b) Glyoxal, ethyllglyoxal, 1, 2-dimethylglyoxal
    c) Glyoxal, methylglyoxal, 2,2-dimethylglyoxal
    d) Glyoxal, methylglyoxal, 2, 3-dimethylglyoxal

    2. The major product obtained on monobromination (Br2/FeBr3) of the following compound A is


  • 14. Environmental Chemistry - Quiz

    1. High concentration of fluoride is poisonous and harmful to bones and teeth at levels over
    a) 1 ppm
    b) 3 ppm
    c) 5 ppm
    d) 10 ppm

    2. Formation of London smog is initiated by a mixture of ________, __________________ and ________and is formed in the _________season.
    a) No2, particulars, high humidity, summer
    b) So2, particulars, high humidity, winter
    c) Co2, particulars, low humidity, summer
    d) None of these

  • 15. Chemical Equlibrium - Quiz

    1. In a chemical reaction
    N2 + 3H2 $\rightleftharpoons$ 2NH3, at equilibrium point
    a) Equal volume of N2 and H2 are reacting
    b) Equal masses of N2 and H2 are reacting
    c) The reaction has stopped
    d) The same amount of ammonia is formed as is decomed into N2 and H2

    2. When two reactants A and B are mixed ro give products C and D, the reaction quotient Q at the initial stages of the reaction
    a) Is zero
    b) Decreases with time
    c) Is independent of time
    d) Increases with time

  • 16. Ionic Equlibrium - Quiz

    1. Conjugate base of is
    a) H2O
    b) H3O+
    c) H
    d) O2-

    2. Three sparingly soluble salts M2X, MX and MX3 have the same solubility product. Their solubilities will be in the order
    a) MX3 > MX > M2X
    b) MX3 > M2X > MX
    c) MX > MX3 > M2X
    d) MX > M2X > MX3

  • 17. Alkanes and Cycloalkanes - Quiz

    1. The total number of isomers including stereisomers for 1,2-Dimethyl cyclobutane is :
    a) 2 , one cis and one trans (both optically inactive)
    b) 3, one cis and two optically active trans form
    c) 3, one trans and two optically active cis forms
    d) 4, two cis (optically active) and two trans (optically active_

    2. The decreasing order of boiling points of the following compounds is :

    a) (I) > (II) > (III) > (IV)
    b) (IV) > (III) > (II) > (I)
    c) (III) > (IV) > (I) > (II)
    d) (IV) > (III) > (II) > (I)

  • 18. Alkenes and Alkadienes - Quiz

    1. trans-3,6-Dimethyl oct-4-ene (A) exists in two diastereomers (I) and (II).

    a) (I) is optically active and (II) is not
    b) (II) is optically active and (I) is not
    c) Both are optically active
    d) Both are optically inactive due to the presence of centre of symmetry.

    Which statement is true?
    i. The product is
    ii. The product is
    iii. The reaction is called alkoxymercuration-demercuration (a type of solvomercuration-demercuration).
    iv. If proceeds via Markonikov addition, anti-addition of and ROH ( as nucleophilic solvent), and no rearrangement.
    a) (i)
    b) (ii)
    c) (i), (iii) and (iv)
    d) (ii), (iii), and (iv)

  • 19. Alkynes - Quiz

    The major amount of (C) is :

    A, B and C are :

  • 20. s-Block Elements (Alkaline Earth Metal) - Quiz

    1. Ripening of fruits can be carried out in presence of
    a) Na2SO4
    b) NaCl
    c) CaCl2
    d) CaC2

    2. Among the alkali metals caesium is the most reactive because
    a) It has incomplete shell which is nearest to the nucleus
    b) It has a single electron in the valence shell
    c) It is the heaviest alkali metal
    d) The outermost electron is more loosely bound than the outermost electron of the other alkali metals

  • 21. p-Block Group 14 (Carbon Family) - Quiz

    1. Which of the following has least tendency to undergo catenation?
    a) C
    b) Si
    c) Ge
    d) Sn

    2. Solid carbon dioxide is used as:
    a) Poison
    b) Fire extinguisher
    c) Refrigerant
    d) Artificial respiration

  • 22. Classification & Nomenclature of Organic Compounds - Quiz

    1. The IUPAC name of PhCN is:
    a) Phenyl cyanide
    b) Benzonitrile
    c) Benzene nitrile
    d) All

    2. The alkane which has only 10 H atoms is:
    a) Neopentane
    b) Isopentane
    c) Pentane
    d) 2,2-Dimethyl butane

  • 23. Quantitative & Qualitative Analysis - Quiz

    1. 0.14 gm of an acid required 12.5 ml of 0.1 N NaOH for complete neuturalisation. The equivalent mass of the acid is:
    a) 63
    b) 56
    c) 45
    d) 112

    2. An organic compound contains 4% sulphur. Its minimum molecular weight is:
    a) 200
    b) 400
    c) 800
    d) 1600

  • 24. Isomerism - Quiz

    1. The keto form of phenol contains:
    a) 3π, 13σ, 4 non-bonding electrons.
    b) 3π, 9σ, 4 non-bonding electrons
    c) 3π, 9σ 2 non-bonding electrons
    d) 3π , 8σ, 4 non-bonding electrons

    2. Predict the number of stereoisomers for 2,5-heptadiene.
    a) 4
    b) 3
    c) 2
    d) 5

  • 25. General Organic Chemistry - Quiz

    1. The decreasing order of -I effect of the orbitals is :
    I. sp II. Sp2 III. Sp3
    a) I > III
    b) III > II > I
    c) I > III > II
    d) II > III > I

    2. The decreasing order of boiling points of the following is :
    I. RCOCl II. (RCO2)O
    a) I > IV > II > III
    b) III > II > IV > I
    c) IV > III > I > II
    d) II > I > III > IV

  • 26. Organic Reaction & Mechanism - Quiz

    Which product is racemic in the avove reaction?
    a) Product B
    b) Product C
    c) Both
    d) None

    2. Which statement is correct about the following reaction?

    a) Major product is (I) and minor product is (II) by SN1 mechanism.
    b) Major product is (I) and minor product is (II) by SN2 mechanism
    c) Major product is (II) and minor product is (I) by SN1 mechanism
    d) Major product is (II) and minor product is (I) by SN2 mechanism.