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Objective Questions

Latest JEE Mains & Advanced Chemistry in English Exam Question (Objective Questions), MCQ in English

Subjects : Chemistry

Question Bank JEE Main & Advanced Chemistry Exam - English
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Chemistry

Question 1Single Answer
10-6 M NaOH is diluted 100 times. The pH of the diluted base is
  1. A
    between 7 and 8
  2. B
    between 5 and 6
  3. C
    between 6 and 7
  4. D
    between 10 and 11
Question 2Single Answer
In the electrolysis of acidulated water, it is desired to obtain 1.12 cc of hydrogen per second under STP condition. The current to be passed is
  1. A
    1.93 A         
  2. B
    9.65 A
  3. C
    19.3 A        
  4. D
    0.965 A
Question 3Single Answer
The one which decreases with dilution is
  1. A
    molar conductance
  2. B
    conductance
  3. C
    specific conductance
  4. D
    equivalent conductance
Question 4Single Answer
Vapour pressure of pure ‘A’ is 70 mm of Hg at 25oC. It forms an ideal solution with ‘B’ in which mole fraction of A is 0.8. if the vapour pressure of the solution is 84 mm of Hg at 25oC, the vapour pressure of pure ‘B’ at 25oC is
  1. A
    28 mm   
  2. B
    56 mm
  3. C
    70 mm    
  4. D
    140 mm
Question 5Single Answer
A 6% solution of urea is isotonic with
  1. A
    1 M solution of glucose
  2. B
    0.05 M solution of glucose
  3. C
    6% solution of glucose
  4. D
    25% solution of glucose
Question 6Single Answer
In countries nearer to polar region, the roads are sprinkled with CaCl2. This is
  1. A
    to minimise the wear and tear of the roads
  2. B
    to minimise the snow fall
  3. C
    to minimise pollution
  4. D
    to minimise the accumulation of dust on the road
Question 7Single Answer
A compound of ‘A’ and ‘B’ crystallises in a cubic lattice in which ‘A’ atoms occupy the lattice points at the corners of the cube. The ‘B’ atoms occupy the centre of each face of the cube. The probable empirical formula of the compound is
  1. A
    AB2 
  2. B
    A2B
  3. C
    AB
  4. D
    AB3
Question 8Single Answer
In electrophilic aromatic substitution reaction, the nitro group is meta directing because it
  1. A
    decreases electron density at ortho and para positions
  2. B
    decreases electron density at meta position
  3. C
    increases electron  density at meta position
  4. D
    increases electron density at ortho and para position
Question 9Single Answer
The best method for the conversion of an alcohol into an alkyl chloride is by treating the alcohol with
  1. A
    PCI5
  2. B
    PCI3
  3. C
    SOCl2 in presence of pyridine
  4. D
    dry HCl in the presence of anhydrous ZnCl2
Question 10Single Answer
The carbon bond length in benzene is
  1. A
    in between C2H6 and C2H4
  2. B
    same as in C2H4
  3. C
    in between C2H6 and C2H2
  4. D
    in between C2H4 and C2H2
Question 11Single Answer
The compound which is not formed during the dry distillation of a mixture of calcium formate and calcium acetate is
  1. A
    methanal
  2. B
    propanal
  3. C
    propanone
  4. D
    ethanal
Question 12Single Answer
An organic compound x is oxidised by using acidified K2Cr2O7. The product obtained reacts with phenyl hydrazine but does not answer silver mirror test. The possible structured of X is
  1. A
    CH3CH2OH
  2. B
    CH3 – C – CH3
  3. C
    (CH3)2CHOH 
  4. D
    CH3CHO
Question 13Single Answer
Arrange the following in the increasing of their. Basic strengths CH3NH2, (CH3)2NH, (CH3)2N, NH3
  1. A
    NH3, < (CH3)3N < (CH3)2NH < CH3NH2
  2. B
    NH3 < (CH3)3N < CH3NH2 < (CH3)2NH
  3. C
    (CH3)3N < NH3 < CH3NH2 < (CH3)2NH
  4. D
    CH3NH2 < (CH3)2NH < (CH3)3N , NH3
Question 14Single Answer
The one which has least iodine value is
  1. A
    sunflower oil 
  2. B
    ginger oil
  3. C
    ghee
  4. D
    groundnut oil
Question 15Single Answer
A diabetic person carries a packet of glucose with him always, because
  1. A
    glucose reduces the blood sugar level slowly
  2. B
    glucose increases the blood sugar level slowly
  3. C
    glucose reduces the blood sugar level
  4. D
    glucose increases the blood sugar level almost instantaneously
Question 16Single Answer
Which of the following is not a synthetic fibre:
  1. A
    Anygora
  2. B
    Rayon
  3. C
    Nylon
  4. D
    Polyster
Question 17Single Answer
Which one of the following is not contained in Portland cement ?
  1. A
    Ca3Al2O6
  2. B
    Ca3SiO5
  3. C
    Ca2Si­O4
  4. D
    Ca3(PO4)2
Question 18Single Answer
What is the reson for white cement to be white ?
  1. A
    It does not contain carbon
  2. B
    It does not contain silicon
  3. C
    It does not contain iron
  4. D
    It does not contain calcium
Question 19Single Answer
Which fertilizer is assimilated directly by the plant ?
  1. A
    Super phosphate
  2. B
    Nitrolim
  3. C
    Muriate of Potash
  4. D
    Humus
Question 20Single Answer
Which of the following chemicals is used in foam fire extinguishers ?
  1. A
    Aluminium sulphate
  2. B
    Copper sulphate
  3. C
    Cobalt sulphate
  4. D
    Nickel sulphate 
Question 21Single Answer
What is a mixture of potassium nitrate, powdered charcoal and sulphur called ?
  1. A
    Glass
  2. B
    Cement
  3. C
    paint
  4. D
    Gun powder
Question 22Single Answer
Which one of the following chemicals is used in beauty parlours for hair – setting ?
  1. A
    Sulphur based
  2. B
    Phosphorus based
  3. C
    Silicon based
  4. D
    Iron based 
Question 23Single Answer
Which one of the following is used as a mordant in dyeing and tanning industry ?
  1. A
    Magnesium oxide
  2. B
    Magnesium carbonate
  3. C
    Magnesium chloride
  4. D
    Magnesium sulphate
Question 24Single Answer
Which one of the following substances is used in the manufacture of safety matches ?
  1. A
    Red phosphorus
  2. B
    White phosphorus
  3. C
    Phosphorus trioxide (P2O3)
  4. D
    Black phosphorus
Question 25Single Answer
Which one of the following polymeric materials is used for making bullet proof jacket ?
  1. A
    Nylon –6, 6
  2. B
    Rayon
  3. C
    Kevlar
  4. D
    Dacron
Question 26Single Answer
Which one of the following is another name of RDX
  1. A
    Cyanohydrin
  2. B
    Dextran
  3. C
    Cyclohexane
  4. D
    Cyclonite
Question 27Single Answer
Which one of the following is used as an explosive ?
  1. A
    Phosphorus trichloride
  2. B
    Mercuric oxide
  3. C
    Graphite
  4. D
    Nitroglycerine
Question 28Single Answer
Flint glass is obtained from which of the following ?
  1. A
    Zinc and barium borosilicate
  2. B
    Sand, red lead and potassium carbonate
  3. C
    Sodium aluminium borosilicate
  4. D
    Pure silica and zinc oxide
Question 29Single Answer
Which one of the following correctly defines the state of glass ?
  1. A
    Crystalline solid
  2. B
    Super cooled liquid
  3. C
    Condensed gas
  4. D
    Liquid crystal
Question 30Single Answer
Which one of the following is not used as fertilizer ?
  1. A
    Ammonium nitrate
  2. B
    Ammonium sulphide
  3. C
    Ammonium phosphate
  4. D
    Ammonium sulphate   
Question 31Single Answer
Which one of the following elements is needed in the human body to transfer electrical signals by nerve cells ?
  1. A
    Lithium
  2. B
    Sodium
  3. C
    Rubidium
  4. D
    Caesium
Question 32Single Answer
Which one of the following is NOT true for bleaching powder ?
  1. A
    It is used as a reducing agent in chemical industries
  2. B
    It is used for bleaching wood pup in paper factories
  3. C
    It is used for disinfecting drinking water
  4. D
    It is used for bleaching linen in textile industry
Question 33Single Answer
Hard glass having the same ingredientsas soft glass excepts.
  1. A
    hard glass have Na in place of K
  2. B
    hard glass having K in place of Na
  3. C
    hard glass having both Na and K
  4. D
    None of the above
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