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JEE MAIN 2018 ONLINE 15TH APRIL MORNING SLOT
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90
Duration
180 mins
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IIT-JEE Main - Previous Year Papers
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90questions
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90questions
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2018 · Physics · Mechanics · Heat And Thermodynamics
JEE MAIN 2018 ONLINE 15TH APRIL MORNING SLOT
A Carnot's engine works as a refrigerator between \(250\) K and \(300\) K. It receives \(500\) cal heat from the reservoir at the lower temperature. The amount of work done in each cycle to operate the refrigerator is :
2018 · Chemistry · Physical Chemistry · Solid State
JEE MAIN 2018 ONLINE 15TH APRIL MORNING SLOT
Which of the following arrangements shows the schematic alignment of magnetic moments of antiferromagnetic substance ?
A
B
C
D
2018 · Mathematics · Algebra · 3D Geometry
JEE MAIN 2018 ONLINE 15TH APRIL MORNING SLOT
An angle between the plane, x + y + z = 5 and the line of intersection of the planes, 3x + 4y + z \(-\) 1 = 0 and 5x + 8y + 2z + 14 =0, is :
2018 · Physics · Modern Physics · Atoms And Nuclei
JEE MAIN 2018 ONLINE 15TH APRIL MORNING SLOT
A solution containing active cobalt \({^{60}_{27}}Co\) having activity of \(0.8\) \(\mu Ci\) and decay constant \(\lambda\) is injected in an animal's body. If \(1\,c{m^3}\) of blood is drawn from the animal's body after \(10\) hrs of injection, the activity found was \(300\) decays per minute What is the volume of blood that is flowing in the body ? \(\left( {\,\,Ci = 3.7 \times {{10}^{10}}\,} \right.\) decays per second and at \(t=10\) hrs \(\left. {{e^{ - \lambda t}} = 0.84} \right)\)
2018 · Chemistry · Inorganic Chemistry · P Block Elements
JEE MAIN 2018 ONLINE 15TH APRIL MORNING SLOT
A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the aformentioned solution, a white precipitate is obtained which does not dissolve in dil. nitric acid. The anion is :
2018 · Mathematics · Algebra · Binomial Theorem
JEE MAIN 2018 ONLINE 15TH APRIL MORNING SLOT
If n is the degree of the polynomial,
\({\left[ {{2 \over {\sqrt {5{x^3} + 1} - \sqrt {5{x^3} - 1} }}} \right]^8} +\) \({\left[ {{2 \over {\sqrt {5{x^3} + 1} + \sqrt {5{x^3} - 1} }}} \right]^8}\)
and m is the coefficient of xn in it, then the ordered pair (n, m) is equal to :
\({\left[ {{2 \over {\sqrt {5{x^3} + 1} - \sqrt {5{x^3} - 1} }}} \right]^8} +\) \({\left[ {{2 \over {\sqrt {5{x^3} + 1} + \sqrt {5{x^3} - 1} }}} \right]^8}\)
and m is the coefficient of xn in it, then the ordered pair (n, m) is equal to :