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JEE MAIN 2018 ONLINE 15TH APRIL EVENING SLOT
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90
Duration
180 mins
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IIT-JEE Main - Previous Year Papers
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90questions
Medium
67
74.4%
Easy
22
24.4%
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1.1%
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90questions
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2018 · Chemistry · Inorganic Chemistry · Isolation Of Elements
JEE MAIN 2018 ONLINE 15TH APRIL EVENING SLOT
In the leaching method, bauxite ore is digested with a concentrated solution of NaOH that produces 'X'. When CO2 gas is passed through the aqueous solution of 'X', a hydrated compound 'Y' is precipitated. 'X' and 'Y' respectively are :
2018 · Physics · Modern Physics · Communication Systems
JEE MAIN 2018 ONLINE 15TH APRIL EVENING SLOT
The carrier frequency of a transmitter is provided by a tank circuit of a coil of inductance 49 \(\mu\)H and a capacitance of 2.5 nF. It is modulated by an audio signal of \(12\) \(kHz.\) The frequency range occupied by the side bands is :
2018 · Mathematics · Algebra · Binomial Theorem
JEE MAIN 2018 ONLINE 15TH APRIL EVENING SLOT
The coefficien of x10 in the expansion of (1 + x)2(1 + x2)3(1 + x3)4 is equal to :
2018 · Chemistry · Physical Chemistry · Solid State
JEE MAIN 2018 ONLINE 15TH APRIL EVENING SLOT
All of the following share the same crystal structure except :
2018 · Physics · Mechanics · Heat And Thermodynamics
JEE MAIN 2018 ONLINE 15TH APRIL EVENING SLOT
Two Carnot engines A and B are operated in series. Engine A receives heat from a reservoir at 600 K and rejects heat to a reservoir at temperature T. Engine B receives heat rejected by engine A and in turn rejects it to a reservoir at 100 K. If the efficiencies of the two energies A and B are represented by \({\eta _A}\) and \({\eta _B},\) respectively, then what is the value of \({{{\eta _B}} \over {{\eta _A}}}\) ?
2018 · Mathematics · Algebra · Sequences And Series
JEE MAIN 2018 ONLINE 15TH APRIL EVENING SLOT
Let An = \(\left( {{3 \over 4}} \right) - {\left( {{3 \over 4}} \right)^2} + {\left( {{3 \over 4}} \right)^3}\) \(-\). . . . . + (\(-\)1)n-1 \({\left( {{3 \over 4}} \right)^n}\) and Bn = 1 \(-\) An.
Then, the least dd natural numbr p, so that Bn > An , for all n\(\ge\) p, is :
Then, the least dd natural numbr p, so that Bn > An , for all n\(\ge\) p, is :