List of practice Questions

1-Butanol is oxidised with acidified $K_2Cr_20_7$, it gives

1 a.m.u is equal to

$1$, $3$, $5$, $7$-Octatetraene contains $X$ $\sigma$-bonds and $Y$ $\pi$-bonds. $'X'$ and $'Y'$ are

If $b$ and $c$ are odd integers, then the equation $x^2 + bx + c = 0$ has

If $x = a + b, y = a \omega +b \omega ^2$ and $z = a \omega^2 + b \omega$, then which one of the following is true.

The principal value of the $arg (z)$ and $ | z |$ of the complex number $z=1+\cos\left(\frac{11\pi}{9}\right)+ i \, \sin\frac{11\pi}{9}$ are respectively

$\left(\frac{1}{1-2i} + \frac{3}{1+i}\right) \left(\frac{3+4i}{2-4i}\right)$ is equal to :

If $P$ is the affix of $z$ in the Argand diagram and $P$ moves so that $\frac{z-i}{z-1}$ is always purely imaginary, then locus of $z$ is

Leaf abscission is caused by

Apples are generally wrapped in waxed paper to

Light break reaction occurs in

Which of the following does not exhibit seed dormancy ?

If the three linear equations $x + 4ay + az = 0$ $x + 3 by + bz = 0$ and $x + 2cy + cz = 0$ have a non-trivial solution, then a, b, c are in

In a myelinated neuron, two adjacent myelin sheaths are separated by gaps called

The matrix 'X' in the equation $AX = B$, such that $A = \begin{bmatrix}1&3\\ 0&1\end{bmatrix}$ and $ B = \begin{bmatrix}1&-1\\ 0&1\end{bmatrix}$ is given by

The value of $ \begin{vmatrix} b+c&a&a\\ b &c+a &b\\ c & c &a+b \end{vmatrix}$ is

Cobalt containing vitamin is

The only integral root of the equation $ \begin{vmatrix} 2-y &2&3\\ 2 &5-y &6\\ 3 & 4 & 10-y \end{vmatrix}$=0 is

Vitamin $C$ helps in absorption of

Which vitamin is fat soluble?

Which of the following does not reduce Benedict's solution?

Malachite is an ore of

The electronegativity of the following elements is in the order

The heats of neutralisation of four acids $A,B,C$ and $D$ when neutralised against a common base are $13$. $7, 9.4,11.2$, and $12.4 \,kcal$ respectively. The weakest and strongest among these acids are respectively

An organic compound of molecular formula $C_{4}H_{10}O$ does not react with sodium. With excess of $HI$, it gives only one type of alkyl halide. The compound is