List of practice Questions

The series combination of two capacitors shown in figure is connected across 1000V. The magnitude of the charges on the capacitors will be

The resistance of a field coil measures 50$\Omega$ at 20?C and 65$\Omega$ at 70?C. The temperature coefficient of resistance is

The reaction,Zn(s) + CuSO4(aq) $\rightarrow$ZnSO4(aq) + Cu(s) is an example of a

RMS value of AC is _______ of the peak value

The tendencies of the electrodes made up of Cu, Zn and Ag to release electrons when dipped in their respective salt solutions decrease in the order

The metal that crystallises in simple cubic system is

In a tangent galvanometer, a current of 1A produces a deflection of 30?. The current required to produce a deflection of 60? is

In the presence of magnetic field ?B? and electric field ?E?, the total force on a moving charged particle is

The electrolyte used in Lechlanche cell is

In a P-type semiconductor, the acceptor impurity produces an energy level

The magnetic moment of lanthanide ions is determined from which one of the following relation?

The hydrogen ion concentration of a $ 10^{-8}M HCl $ aqueous solution at 298 K $ ( K_w = 10^{-14} ) $ is :-

The appearance of colour in solid alkali metal halides is generally due to :

The following is a diagram of the just spawned frog's egg, with the parts labelled from A to E. Identify the parts and choose the correct option from those given below

Insulin regulates the metabolism of

Which of the following has the highest bond order ?

Maximum number of hydrogen bonding is in :

The enthalpy and entropy change for the reaction : $ {Br2(\ell) + Cl2(g) -> 2BrCl(g)}$ are $30 \,kJmol^{-1}$ and $105\,JK^{-1} mol^{-1}$ respectively. The temperature at which the reaction will be in equilibrium is :

Two circular coils 1 and 2 are made from the same wire but the radius of the $1^{st} $ coil is twice that of the $ 2^{nd} $coil. What potential difference in volts should be applied across them so that the magnetic field at their centres is the same-

Which of the following species has a linear shape?

In the group $G = \{1,5,7,11\}$ under multiplication modulo $12$, the solution of $ 7^{-1} \; \otimes_{12} (x \otimes_{12} 11) = 5$ is $x$ =

The value of $\displaystyle\lim_{x \to 0} \frac {5^x-5^{-x}}{2x}=$ is :

A rectangular block is 5 cm $\times$ 5 cm $\times$ 10 cm in size. The block is floating in water with 5 cm side vertical. If it floats with 10 cm side vertical, what change will occure in the level of water?

An ice block contains a glass ball. When the ice melts within the water containing vessel, the level of water:

Air is blown through a hole on a closed pipe containing liquid. Then, the pressure will