List of top Questions asked in CBSE CLASS XII

The general solution of the differential equation \(e^{x}dy+(ye^{x}+2x)dx=0\) is

The solution of the differential equation \( \frac{dy}{dx} = \frac{1}{\log y} \) is:
The integrating factor of the differential equation \[ (1 - x^2) \frac{dy}{dx} + xy = ax, \quad -1 < x < 1, \] is:
The differential equation \( \frac{dy}{dx} = F(x, y) \) will not be a homogeneous differential equation, if \( F(x, y) \) is:
The degree of the differential equation \( (y'')^2 + (y')^3 = x \sin(y') \) is:
The number of solutions of the differential equation \( \frac{dy}{dx} - y = 1 \), given that \( y(0) = 1 \), is:
The degree of the differential equation \( (y'')^2 + (y')^3 = x \sin(y') \) is:
The differential equation \( \frac{dy}{dx} = F(x, y) \) will not be a homogeneous differential equation, if \( F(x, y) \) is:

Which of the given values of x and y make the following pair of matrices equal \(\begin{bmatrix}3x+y&5\\y+1&2-3x\end{bmatrix}=\begin{bmatrix}0&y-2\\8&4\end{bmatrix}\)

The number of all possible matrices of order 3 × 3 with each entry 0 or 1 is:

Matrices A and B will be inverse of each other only if

Choose the correct answer in the following questions: If \(\begin{bmatrix} α & β  \\ \gamma & -\alpha \end{bmatrix}\) is such that A2=I then  
If A is square matrix such that A2=A,then (I+A)3-7A is equal to
If the matrix \(A\) is both symmetric and skew symmetric,then
If A,B are symmetric matrices of same order,then AB−BA is a
If \(A=\begin{bmatrix}cosα& -sinα\\ sinα& cosα\end{bmatrix}\),thenA+A=I,if the value of \(α\) is
The diamagnetic species is :
At. No. Co = 27, Fe =26, Ni= 28]
The complex ions \([Co(NH_3)_5(NO_2)]^{2+\) and \([Co(NH_3)_5(ONO)]^{2+}\) are called}

Which one of the following has the highest dipole moment?

(i)CH2Cl2

(ii)CHCl3

(iii)CCl4

Azeotropic mixture of water and HCl boils at 381.5 K. By distilling the mixture it is possible to obtain
The charge required for the reduction of 1 mol of \( MnO_4^- \) to \( MnO_2 \) is

How many ions are produced from the complex \(Co(NH_3)_6Cl_2\) in solution? 
 

Amongst the following, the most stable complex is
The oxidation number of cobalt in \(K[Co(CO)_4]\) is
Which is the correct IUPAC name for
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