List of top Questions asked in JCECE

Which of the following is poisonous?

Thomas slag is:

Which of the following has maximum ionisation energy?

Which of the following statements, about zero order reaction is not true?

Which of the following give ammonia, on heating with NaOH?

Thomas slag is:

The amount of $ {{\text{H}}_{\text{2}}}\text{S}\text{.} $ required to precipitate $ \text{1}\text{.69 g BaS} $ from $ \text{BaC}{{\text{l}}_{\text{2}}} $ solution is:

Which of the following Statements, about zero order reaction is not true?

Representative elements are

Two vectors have magnitudes 3 and 5. If angle between them is 60$^{\circ}$, then the dot product of two vectors will be

The volume of a metal sphere increases by $ \text{0}\text{.15 }\!\!%\!\!\text{ } $ when its temperature is raised by $ \text{24}{{\,}^{\text{o}}}\text{C}\text{.} $ The coefficient of linear expansion of metal is:

The relative permeability of iron is $6000$. Its magnetic susceptibility is

As shown in figure, a planet revolves in elliptical orbit around the sun. Where is KE of the planet maximum?

A triode valve has an amplification factor of 20 and its plate is given a potential of 300 V. The grid-voltage to reduce the plate current to zero, is :

For a satellite moving in an orbit around the earth, the ratio of kinetic to potential energy is:

In an ideal parallel LC circuit, the capacitor is charged by connecting it to a DC source which is then disconnected. -The current in the circuit:

The period of SHM of a particle is 12 s. The phase difference between the positions at $ t=3\,s $ and $ t=4s $ will be:

If the velocity of light c, gravitational constant G and Planck's constant $ h, $ are chosen as fundamental units, the dimensional formula of length L in the new system is: