$50 \ \Omega$ and $100 \ \Omega$ resistors are connected in series. This connection is connected with a battery of $2.4 \ V$. When a voltmeter of $100 \ \Omega$ resistance is connected across the $100 \ \Omega$ resistor,the reading of the voltmeter will be $.......... \ V$.

$A$ body projected vertically upwards crosses a point twice in its journey at a height $h$ just after $t_1$ and $t_2$ seconds. Maximum height reached by the body is

Which of the following can be used to extinguish a fire caused by sodium,potassium,and lithium?

The protective coat of structural protein in viruses is made up of units called:

Among the following, the $CORRECT$ combinations are :
$A.$ $IF_3$ $\rightarrow$ $T$-shaped $(sp^3d)$
$B.$ $IF_5$ $\rightarrow$ Square pyramidal $(sp^3d^2)$
$C.$ $IF_7$ $\rightarrow$ Pentagonal bipyramidal $(sp^3d^3)$
$D.$ $ClO_4^-$ $\rightarrow$ Square planar $(sp^3d)$
Choose the correct answer from the options given below :

Which of the following is not a polymer?