JEE Free Chemistry Online Mock Test:
Ques. The mass of copper deposited from a solution of CuSO4 by passage of 5 A current for 965 second is (Mol. wt. of Copper = 63.5)
(a) 15.875 g
(b) 1.5875 g
(c) 4825 g
(d) 96500 g
Ques. 1 L of N2 combines with 3 L of H2 to form 2L of NH3 under the same conditions. This illustrates the
(a) Law of constant composition
(b) Law of multiple proportions
(c) Law of reciprocal proportions
(d) Gay-Lussac’s law of gaseous volumes
Ques. Atomic hydrogen reacts with oxygen to give
(a) Almost pure water
(b) Almost pure hydrogen peroxide
(c) A mixture of water and hydrogen peroxide
(d) None of these
Ques. The number of equivalents of Na2S2O3 required for the volumetric estimation of one equivalent of Cu2+ is
(a) 1
(b) 2
(c) 3/2
(d) 3
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Ques. Molisch’s test is done for the detection of
(a) Alkyl halide
(b) Carbohydrate
(c) Alkaloid
(d) Fat
Ques. Values of the four quantum numbers for the last electron in the atom are n = 4, l = 1, m = + 1 and s = –1/2. Atomic number of the atom will be
(a) 22
(b) 32
(c) 33
(d) 36
Ques. How many isomers are possible in [Co(en)2Cl2]
(a) 2
(b) 4
(c) 6
(d) 1
Ques. Which one in the following contains ionic as well as covalent bond?
(a) CCl
(b) HCl
(c) KCN
(d) KCl
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Ques. The coordination and oxidation number of X in the compound [X(SO4)(NH3)5] Cl will be
(a) 6 and 4
(b) 10 and 3
(c) 2 and 6
(d) 6 and 3
Ques. What weight of hydrated oxalic acid should be added for complete neutralisation of 100 ml of 0.2 N – NaOH solution?
(a) 0.45 g
(b) 0.90 g
(c) 1.08 g
(d) 1.26 g
Ques. The oxidation number of cobalt in K[Co(CO)4] is
(a) +1
(b) –1
(c) +3
(d) –3
Ques. The boiling point of 0.1 molal aqueous solution of urea is 100.18o C at 1 atm. The molal elevation constant of water is
(a) 1.8
(b) 0.18
(c) 18
(d) 18.6
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Ques. The minimum energy necessary to permit a reaction is
(a) Internal energy
(b) Threshold energy
(c) Activation energy
(d) Free energy
Ques. Crystals of covalent compounds always have
(a) Atoms as their structural units
(b) Molecules as structural units
(c) Ions held together by electrostatic forces
(d) High melting points
Ques. Which metal is found in free state?
(a) Iron
(b) Gold
(c) Aluminium
(d) Sodium
Ques. If a electron is present in place of anion in a crystal lattice, then it is called
(a) Frenkel defect
(b) Schottky defect
(c) Interstitial defects
(d) F – centre
Ques. The time of completion of 90% of a first order reaction is approximately
(a) 1.1 times that of half life
(b) 2.2 times that of half life
(c) 3.3 times that of half life
(d) 4.4 times that of half life
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Ques. One mole of NaCl (s) on melting absorbed 30.5 kJ of heat and its entropy is increased by 28.8 JK–1. The melting point of NaCl is
(a) 1059 K
(b) 30.5 K
(c) 28.8 K
(d) 28800 K
Ques. Which one of the following is not a property of hydrophilic solutions?
(a) High concentrations of dispersed phase can be easily attained
(b) Coagulation is reversible
(c) Viscosity and surface tension are about the same as for water
(d) The charge of the particle depends on the values of the medium; it may be positive, negative or even zero
Ques. Temperature of maximum density in H2O and D2O respectively are
(a) 277.15 K, 284.75 K
(b) 273.15 K, 277.15 K
(c) 277.15 K, 285.75 K
(d) 284.75 K, 277.15 K
Ques. The following reaction belongs to
(a) Elimination reaction
(b) Substitution reaction
(c) Free radical reaction
(d) Displacement reaction
Ques. The most stable conformation of n-butane is
(a) Skew boat
(b) Eclipsed
(c) Gauche
(d) Staggered
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Ques. The process used for the removal hardness of water is
(a) Calgon
(b) Baeyer
(c) Serpeck
(d) Hoope
Ques. Preparation of alkyl halides in laboratory is least preferred by
(a) Halide exchange
(b) Direct halogenation of alkanes
(c) Treatment of alcohols
(d) Addition of hydrogen halides to alkenes
Ques. The freezing point of a solution containing 4.8 g of a compound in 60 g of benzene is 4.48. What is the molar mass of the compound (Kf = 5.1 km–1), (freezing point of benzene = 5.5o)
(a) 100
(b) 200
(c) 300
(d) 400
Ques. Buna-s rubber is which of the following of 1-3-butadiene and styrene
(a) Polymers
(b) Copolymer
(c) Addition
(d) Condensation polymer
Ques. Which of the following is a protein?
(a) Pepsin
(b) Adrenaline
(c) ATP
(d) Glutamin
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Ques. Which of the following exhibits optical isomerism?
(a) Butanol-1
(b) Butanol-2
(c) Butene-1
(d) Butene-2
Ques. The ionic radii of Rb+ and I– are 1.46 Å and 2.16Å. the most probable type of structure exhibited by it is
(a) CsCl type
(b) ZnS type
(c) NaCl type
(d) CaCl type
Ques. The product obtained by dry distillation of calcium formate on reacting with ammonia yields
(a) Formamide
(b) Acetamide
(c) Acetaldehyde ammonia
(d) Urotropine
Ques. Melting points are normally the highest for
(a) Tertiary amides
(b) Secondary amides
(c) Primary amides
(d) Amines
Ques. A gas of volume 100 cc is kept in a vessel at pressure 104 Pa maintained at temperature 24oC. If now the pressure is increased to 105 Pa, keeping the temperature constant, then the volume of the gas becomes
(a) 10 cc
(b) 100 cc
(c) 1 cc
(d) 1000 cc
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Ques. If the pressure and absolute temperature of 2 litres of CO2 are doubled, the volume of CO2 would become
(a) 2 litres
(b) 4 litres
(c) 5 litres
(d) 7 litres
Ques. Phenyl isocyanides are prepared from which of the following reactions
(a) Rosenmund’s reaction
(b) Carbylamine reaction
(c) Reimer-Tiemann reaction
(d) Wurtz reaction
Ques. One mole of potassium dichromate completely oxidises the following number of moles of ferrous sulphate in acidic medium
(a) 1
(b) 3
(c) 5
(d) 6
Ques. Which of the following is optically active?
(a) Butane
(b) 4-methylheptane
(c) 3-methylheptane
(d) 2-methylheptane
Related: Fluid Mechanics Questions and Answers
Ques. The atomic radii from Cr to Cu is almost identical because of
(a) Increasing nuclear charge from Cr to Cu
(b) Repulsion among increased electrons
(c) Increased screening effect to nullify increased nuclear charge
(d) All the above
Ques. The correct order of second ionization potential of carbon, nitrogen, oxygen and fluorine is
(a) C > N > O > F
(b) O > N > F > C
(c) O > F > N > C
(d) F > O > N > C
Ques. On addition of one ml of 10% NaCl solution to 10 ml gold sol in the presence of 0.25 gm of starch. The coagulation is just prevented, starch has gold number
(a) 0.025
(b) 0.25
(c) 2.5
(d) None
Ques. 0.2 gm of fine animal charcoal is mixed with half litre of acetic acid (–SM) solution and shaken for 30 minutes
(a) The concentration of the solution decreases
(b) Concentration increases
(c) Concentration remains same
(d) None of these
