class 12

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JEE Main

Among the following, the essential amino acid is :

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The number of points, having both co-ordinates as integers, that lie in the interior of the triangle with vertices (0, 0), (0, 41) and (41, 0), is :

A signal of 5 kHz frequency is amplitude modulated on a carrier wave of frequency 2 MHz. The frequencies of the resultant signal is/are :

The sum of first 9 terms of the series $11_{3} +1+31_{3}+2_{3} +1+2+31_{3}+2_{3}+3_{3} +.....$is

$(lim)_{x0}((1−cos2x)xtan4x3+cosx $ is equal to:

Energy of an electron is given by $E=−2.178_{′}10_{−18}J$ Wavelength of light required to excite an electron in an hydrogen atom from level n = 1 to n = 2 will be $(h=6.62×10_{?34}Jsandc=3.0×10_{8}ms_{?1})$

Two capacitors \displaystyle{C}_{}

In the following sequence of reactions : Toluene $→KMnO_{4}A→SOCl_{2}BBaSO_{4}→ H_{2}/Pd C,$ The product C is :

The first ionization potential of Na is 5.1 eV. The value of electron gain enthalpy of Na+ will be: