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QJEE MAIN 2020
The number of terms common to the two A.P.’s 3, 7, 11,.....,407 and 2, 9, 16,.....,709 is______.
JEE MainMathematicsEasy
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QJEE MAIN 2020
Let $x=4$ be a directrix to an ellipse whose centre is at the origin and its eccentricity is $\frac{1}{2}$. If $P(1, \beta), \beta>0$ is a...
JEE MainMathematicsHard
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QJEE-MAIN 2020
An element crystallises in a face-centred cubic (fcc) unit cell with cell edge a. The distance between the centres of two nearest octahedral voids in...
JEE MainChemistryEasy
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QJEE MAIN 2020
The first ionization energy (in kJ/mol) of Na, Mg, Al and Si respectively, are
JEE MainChemistryEasy
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QJEE MAIN 2020
The increasing order of boiling points of the following compounds is
JEE MainChemistryEasy
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QJEE MAIN 2020
For the Balmer series in the spectrum of H atom, $\bar{v}=\mathrm{R}_{\mathrm{H}}\left\{\frac{1}{\mathrm{n}_1^2}-\frac{1}{\mathrm{n}_2^2}\right\}$, the correct statements among (I) to (VI) are (I) As wavelength decreases, the...
JEE MainChemistryMedium
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QJEE MAIN 2020
JEE MainMathematicsEasy
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QJEE MAIN 2020
Let $\bigcup_{i=1}^{50} X_i=\bigcup_{i=1}^n Y_i=T$ where each $X_i$ contains 10 elements and each $Y_i$ contains 5 elements. If each element of the set $T$ is an...
JEE MainMathematicsMedium
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QJEE-MAIN 2020
The variation of molar conductivity with concentration of an electrolyte (X) in aqueous solution is shown in the given figure.
The electrolyte X is
JEE MainChemistryEasy
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QJEE MAIN 2020
If $\int \frac{d \theta}{\cos ^2 \theta(\tan 2 \theta+\sec 2 \theta)}=\lambda \tan \theta+2 \log _e|f(\theta)|+C$ where C is a constant of integration, then the ordered pair...
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