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QJE MAIN 2019
The position co-ordinates of a particle moving in a 3-D coordinate system is given by x = a cos ωt, y = a sin ωt,...
JEE MainPhysicsEasy
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QJEE MAIN 2019
atch the following items in column I with the corresponding items in column II.
JEE MainPhysicsEasy
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QJEE MAIN 2019
The top of a water tank is open to air and its water level is maintained. It is giving out 0.74 $m^3$ water per minute...
JEE MainPhysicsMedium
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QJEE MAIN 2019
$\mathrm{K}_2 \mathrm{Hgl}_4$ is $40 \%$ ionised in aqueous solution. The value of its van't Hoff factor (i) is :
JEE MainChemistryMedium
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QJEE MAIN 2019
A water tank has the shape of an inverted right circular cone, whose semi-vertical angle is $\tan ^{-1}\left(\frac{1}{2}\right)$. Water is poured into it at a...
JEE MainMathematicsHard
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QJEE MAIN 2019
Two newspapers A and B are published in a city. It is known that 25% of the city population reads A and 20% reads B...
JEE MainChemistryEasy
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QJEE MAIN 2019
A particle having the same charge as of electron moves in a circular path of radius 0.5 cm under the influence of a magnetic field...
JEE MainPhysicsEasy
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QJEE MAIN 2019
Some identical balls are arranged in rows to form an equilateral triangle. The first row consists of one ball, the second row consists of two...
JEE MainMathematicsMedium
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QJEE MAIN 2019
The mean and the median of the following ten numbers in increasing order $10,22,26,29,34, x, 42,67,70, y$ are 42 and 35 respectively, then $\frac{y}{x}$ is...
JEE MainMathematicsEasy
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QJEE MAIN 2019
In the following compound,
the favourable site/s for protonation is/are :
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