Jee Main Online Paper 7 CBSE sample paper

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      Sri Chaitanya IIT Academy, India JEE-MAIN_ONLINE P7_Prepared by CBSE BOARD

    Sri Chaitanya IIT Academy., India.A right Choice for the Real Aspirant

    Central Office , Madhapur – Hyderabad

    Jee-Main_Online_Paper-7 

    PHYSICS

    1)

    1)1 3 3 2

     M L T A

    2)3 3 2

     ML T A

     3)3 3 2

     ML T A

      4)2 3 2 1

     M L T A

     

    2)

    1) 2)

    3) 4)

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    3)

    1) Statement 1 is true, Statement 2 is false.

    2) Statement 1 is true . Statement 2 is true, Statement 2 is the correct explanation of

    statement 1.

    3) Statement 1 is true . Statement 2 is true, Statement 2 is not the correct explanation of

    statement 1.

    4) Statement 1 is false Statement 2 is true.

    4)

    1)22   v

     M 

     

      2)2

    v

     M 

     

      3)2

    2

    v

     M 

     

      4) 2v   

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    5)

    1) 34J   2) 4.5J   3) 29.5J   4) 34.5J  

    6)

    1) o3R / 2   2) o3R / R   3) o9R / 4   4) o3R  

    7)

    1)-1  2) 2-   3) -3  4) -4 

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    8)

    1)

    Gm

    r   2)

    2Gm

    r  

    3)2 1

    1` 2

    Gm

    4)   2Gm

    2 -1r

     

    9)

    1) a 2) 2a 3) 3a 4) -1a  

    10).

    1)1:1 2)1:2 3) 2:1 4) depend on H 

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    11).

    1)-2/32   2)

    1/32   3)1/32   4)

    1/32  

    12).

    1) increase

    2) decrease

    3) remain the same

    4) increase in winters and decrease in summers 

    13).

    1) 62.50 2) 93.75 3) 125.00 4) 187.50 

    14)

    1) 1.0 2) 0.5 3) 2.0 4) 4.0 

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    15).

    1) Statement 1 is true, Statement 2 is false.

    2) Statement 1 is true, Statement 2 is true, statement 2 is the

    Correct explanation of statement 1.

    3) Statement 1 is true, statement 2 is true, statement 2 is not the

    correct explanation of statement 1. 

    4) Statement 1 is false, Statement 2 is true, 

    16).

    1) 2) 3) 4)

    17).

    1) R / 2   2) R / 4   3) R / 8   4) 2R  

    18).

    1)-7

    8π ×10 N   2)-7

    4π ×10 N   3)-5

    8×10 N   4)-5

    5×10 N  

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    19).

    1) statement 1 is true, Statement 2 is untrue .

    2) statement 1 is true, Statement 2 is true.

    3) statement 1 is true, Statement 2 is true, Statement 2 is not the correct

    explanation of statement 1.

    4) Statement 1 is true, Statement 2 is true, Statement 2 is the correct

    explanation of statement 1.

    20).

    1) 3.01 2) 2.001 3) 1.001 4) 1.01

    21).

    1)1 : 5   2) 1:25   3) 9 : 4   4) 3 : 2  

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    22)

    1) yes, it is possible with the same aperture size

    2) no, it is not possible

    3) possible also with an aperture half the present diameter

    4) given data is not sufficient

    23).

    1) No light 2) red colour only

    3) red and green colours 4) green and blue colours 

    24). The counting rate observed from a a radioactive source at 0t   was 1600

    counts 1,s and at 8 ,t S  it was 100 8 ,t S   The counting rate

    observed as counts 1,s at 6t    S will be :

    1) 400 2) 300 3) 250 4) 200

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    25).

    1) The maximum energy of the photo electrons is hv  

    2) The ejection of the photo electrons is instantaneous

    3) The maximum energy of the photo electrons is independent of the intensity

    of the light

    4) No electrons are emitted id v  is less than / ,W h where W  is the work

    function of the mental

    26)

    1) NOR gate 2) NAND gate 3) OR gate 4) AND gate

    27).

    1) 0.014N / C , 36m 2) 0.014N/C, 360 m

    3) 0.14N/C,36 4) 0.14N/C, 360m

    28).

    1) l / 2   2) l / 4   3)2l   4) l  

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    29).

    1) a < b ; b > c 2) a > b ; b > c 3) a = b = c 4) a < b < c 

    30).

    1) A 2) B 3) C 4) D

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    CHEMISTRY

    1).

    1)4

    MCI   2)2

    MCl   3)3

    MCl   4)5

    MCl  

    2) 

    1) 2 : 8 /   π : 3   2) 8 /  π : 3 : 2  

    3) 3 : 8 /   π : 2   4) 2 : 3 : 8 /    π  

    3).

    1) Electrical conductivity of semiconductors and metals increases with

    increase in temperature 

    2) In BCC unit cell the void space id 32% 

    3) Density of crystals decreases due to Schottky defect. 

    Density of crystals remains unaffected due to frenkel defect. 

    4)

    1) iv < ii < iii < i   2) ii < iv < i < iii  

    3) i < iii < ii < iv   4) iii < i < iv < ii  

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    5)

    1)2SO   2) 2CO ` 3) CO   4) NO  and freons 

    6)

    1) 6.76 2) 8.03 3) 5.76 4) 10.76

    7)

    1) 2.7%  2) 5.2%   3) 10%   4) 30%  

    8)

    1) 30 2) 40 3) 60 4) 80

    9)

    1)-91.40×10   2) -914.0×10   3) -90.14×10   4) -9140×10  

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    10)

    1) 0.53V   2) 0.49V   3) 0.19V   4) 0.38V  

    11)

    1)-1

    59.9kJmol   2)-1

    59.2kJmol  

    3)-1

    29.5kJmol   4)-1

    39.2kJmol  

    12)

    1) peptization 2) emulsification

    3) using Tyndall effect 4) electrodialysis 

    13). 

    1) C > N > O > F   2) O > F > N > C  

    3) O > N > F > C   4) F > O > N > C  

    14)

    1) Potassium ethyl xanthate 2) Copper sulphate

    3) Sodium 4) Aniline

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    15)

    1) La z = 57   2) Ce z = 58  

    3) Eu Z = 63   4) Gd z = 64 

    16)

    1)3NaHCO   2) 2 3Na CO  

    3)2NaHCO and 2 3Na CO   4) 3CaCO  

    17)

    1) 1,0,1,0   2) 0,1,1,0   3) 0,1,0,1  4) 1,0,0,1 

    18)

    1) 2 2) 3 3) 6 4) 8

    19)

    1) 3 isomers (Geometrical) 2) 4 isomers (Geometrical)

    3) 2 isomers (Geometrical) 4) 6 isomers (Geometrical)

    20)

    1)2SO   2) 2CO   3) CO   4) NO and freons 

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    21)

    1) 1,4 – dichlorobenzene

    2) 1,2- dichlorobenzene

    3) trans – 1,2 – dinitroethene

    4) trans 2,3 – dichloro -2 – butane

    22)

    1) Chain isomers 2) Functional isomers

    3) Geometrical isomers 4 Tautomers

    23)

    1) III and VI   2) I and IV  

    3) II and V   4) I and V  

    24)

    1) 2)

    3) 4) 4)2 2

    HOCH - CH = CH  

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    25)

    1) Propanal 2) Acetone 3) Propanol -1 4) Propene

    26).

    1) I I I > I > I I > I V   2) I > I I I > I I > I V  

    3) I I > I I I > I > I V   4) IV > III > II > I  

    27). 

    1) Acetaldehyde 2) Acetamide

    3) Formaldehyde 4) Chlorobenzene

    28)

    1) ANA mainly occurs in the cytoplasm of the cell.

    2) RNA has double stranded    helix structure.

    3) The sugar presents in DNA is D -   ribose.

    4) RNA controls the synthesis of proteins. 

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    29).

    1) Anitimicrobials 2) Antiseptic

    3) Antipyretic 4) Analgesic

    30) 

    1) acids and alcohols 2) n – alkanes and branched alkanes

    3) ketones and aldehydes 4) alkanes and alcohols 

    MATHEMATICS

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    1).

    1) Statement -1 : f is true, Statement -2 true; statement -2 is a correct

    explanation for statement -1.

    2) Statement -1 is true, statement -2 is true ; statement -2 is not a correct

    explanation for statement -1 .

    3) Statement -1 is true, Statement -2 is false.

    4) Statement -1 is false, Statement -2 is true.

    2).

    1) 1 22 z + z   2) 1 2z z   3)2 2

    1 2z + z   4) 2 21 22 Z + Z  

    3).

    1) no point

    2 ) exactly one point

    3) exactly two distinct point

    4) two distinct point whose coordinates are always rational number

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    4).

    1) Statement -1 is true, Statement -2 is true ; Statement -2 is a correct

    explanation for statement -1,

    2) Statement -1 is true, Statement -2 is true ; statement -2 is not a correct

    explanation for statement -1

    3) Statement -1 is true, Statement -2 is false

    4) Statement -1 is false, statement -2 is true

    5).

    1) 0 2) I 3) A 4) B

    6).

    1) 2

    7!   2) 2

    6!   3) 6!7!  4) 7!  

    7).

    1)n

    2nC   2) 2nn- C   3)

    2n

    n-1- C   4)2n

    n-1C  

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    8).

    1) r + s   2) r + s - 2  3) r + s - 1   4) r + s + 1 

    9).

    1) 2n n + 1   2) 2n n - 1

    2  3) 2n n -1   4) 

    2n n + 1

    2  

    10).

    1) -π   2) π   3) -1  4) 1 

    11).

    1) a=0, b and c are any real numbers

    2) a=0, b=0, c is any real numbers

    3) b=0, c = 0, a is any real numbers

    4) c =0 , a = 0 , b is any real numbers

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    12)

    1) Statement -1 is true, Statement -2 is true ; Statement -2 is a correct

    explanation for statement -1.

    2) Statement -1 is true, Statement -2 is true ; Statement -2 is not a correct

    explanation for statement-1.

    3) Statement -1 is true , Statement -2 is false

    4) Statement -1 is false , Statement -2 is true

    13).

    1) 5π   2) 10π   3) 50π   4) 100π  

    14).

    1)2x - 1

    x  2)

    2

    x

    x -1  3)

    2x - 1   4)

    2

    1

    x - 1  

    15).

    1) 3 in cot  x   2) 5 in cot  x   3) 3in tan  x   4) 5 in tan  x  

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    16).

    1) 0 2) 0.243 3) 0.486  4) 1.8

    17).

    1) 1 2)1

    2  3)

    2

    5  4)

    1

    3  

    18).

    1)3 -1

    2  2)

    3 -1

    2  3)

    3 -1

    2 2  4)

    3 + 1

    2 2  

    19).

    1) Statement -1is true, Statement -2 is true ; Statement -2 is a correct

    explanation for statement -1 .

    2) Statement -1 is true, statement -2 is true ; Statement -2 is not a correct

    explanation for statement -1.

    3) Statement -1 is true , statement -2 is false

    4) Statement -1 is false , statement -2 is true 

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    20).

    1) 7 2) 8 3) 9 4) 10

    21).

    1) p q   2) q p   3) q p   4) q p  

    22).

    1) 3 x + 2 y + 5 z + 2 1 = 0   2) 3 x + 2 y + 3 z + 3 5 = 0 

    3) x + y + z = 0   4) x + 2y + z = 0  

    23).

    1) P and R are parallel 2) P and Q are parallel

    3) Q and R are perpendicular 4) P and R are perpendicular

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    24).

    1)1

    4

      2)1

    5

      3)2

    3

      4)1

    3  

    25).

    1) Statement -1 is true, Statement -2 is true ; Statement -2 is a correct

    explanation for statement -1.

    2) Statement -1 is true, Statement -2 is true ; statement -2 is not a correct

    explanation for statement -1.

    3) Statement -1 is true , Statement -2 is false 

    4) Statement -1 is false , Statement -2 is true, 

    26).

    1)-1

    4  2)

    1

    4  3) 4 4) -4

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    27).

    1)2

    y = 14x   2)2

    y = -104x   3)2

    y = -14x   4)2

    y = 26x  

    28).

    1) one 2) two 3) three 4) four

    29)

    1) 1 2 1 3, 1, || L L L L L intersects  2 L   2) 1 2 2 3, 1, || L L L L L  intersects 4 L  

    3) 1 4 2 3, 2|| , || L L L L L intersects  3 L   4) 1 2 1 3 2, , L L L L L  intersects 4 L  

    30).

    1) above x-axis at a distance 3/2 from it

    2) above x-axis at a distance 2/3 from it

    3) below x-axis at a distance 3/2 from it

    4) below x-axis at a distance 2/3 from it