List of practice Questions

The magnitude of vectors $ \overrightarrow{A}$, $\overrightarrow{B}$ and $ \overrightarrow{C} $ are 3, 4 and 5 units respectively. If $ \overrightarrow{A} + \overrightarrow{B} = \overrightarrow{C}$, the angle between $ \overrightarrow{A} $ and $ \overrightarrow{B} $ is

Masses of three wires of copper are in the ratio of $1 : 3 : 5$ and their lengths are in the ratio of $5 : 3 : 1$. The ratio of their electrical resistances is

In the circuit shown below, the current in the $1\Omega$ resistor is

Which one of the following compounds does not exist ?

In 3p-orbital, the number of spherical nodes is

A particle moves in a straight line with a constant acceleration. It changes its velocity from $10 ms^{-1}$ to $20ms^{-1}$ while passing through a distance 135 m in t second. The value of t is

One litre hard water contains 12.00 mg $Mg^{2+}$. Milliequivalents of washing soda required to remove its hardness is

The outermost electronic configuration of the most electronegative element is

The atomic nucleus contains

Typhlops is

Which is not a true amphibian animal?

Association between sucker fish (Remora) and shark is

A wood boring mollusc/Shipworm is

Phenomenon of organisms resembling others for escaping from enemies is

Hair occur in all mammals except those of

Bird vertebrae are

Feet of kingfisher are modified for

Both male and female pigeons secrete milk through

Necturus is

Minerals absorbed by root move to the leaf through

If $P = (1,0), Q = (-1,0)$ and $R= (2,0)$ are three given points, then locus of the points satisfying the relation $SQ^2 + SR^2 = 2SP^2,$ is

Which of the following is optically inactive?

The first ionisation potential of Na, Mg, Al and Si are in the

Two bodies M and N of equal masses are suspended from two separate massless springs of spring constants kx and k2 respectively. If the two bodies oscillate vertically such that their maximum velocities are equal, the ratio of the one amplitude of vibration of M to that of N is

The equivalent weight of MnSO$_4$ is half of its molecular weight, when it converts to