class 12

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JEE Main

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 :

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Consider the following reaction: $xMnO_{4}+yC_{2}O_{4}+zH_{+}3/4 xMn_{2+}+2yCO_{2}+2z H_{2}O$ The values of x, y and z in the reaction are, respectively:

Which of the following compounds is not an antacid ?

If z is a complex number such that $∣z∣≥2$, then the minimum value of $∣∣ z+21 ∣∣ $

Which of the vitamins given below is water soluble ?

Let $y(x)$ be the solution of the differential equation $(xgx)dxdy +y=2xgx,(x≥1)$ Then $y(e)$ is equal to :

Let a and b be the roots of equation $px_{2}+qx+r=0,p=0.$. If p, q, r are in A.P. and $α1 +β1 =4$, then the value of $∣α−β∣$ is

Assuming human pupil to have a radius of 0.25 cm and a comfortable viewing distance of 25 cm, the minimum separation between two objects that human eye can resolve at 500 nm wavelength is :

In which of the following reactions $H_{2}O_{2}$ acts as a reducing agent ?