List of top Questions asked in JCECE- 2006

If pH of a solution is 4, then $ {{\text{H}}^{\text{+}}} $ is:

Half-life of a substance is 6 min. If its initial amount is 32 g, then amount present after 18 minis:

What is equivalent capacitance of the network? Each capacitor has $ \text{1}\,\text{ }\!\!\mu\!\!\text{ F} $ capacitance:

The two capacitors $ {{\text{C}}_{\text{1}}} $ and $ {{\text{C}}_{\text{2}}} $ are charged to potentials $ {{\text{V}}_{1}} $ and $ {{\text{V}}_{2}} $ and then connected in parallel. There will be no flow of energy, if:

If a body moves for 2 s with 15 m/s velocity towards east and then moves with 5 m/s velocity for 8 s towards north, then average velocity is :

The work done by the centripetal force F when the body completes one rotation around the circle of radius R is:

Work done in rotating a bar magnet from 0 to angle $ \text{ }\!\!\theta\!\!\text{ } $ is:

When sodium nitrate is heated above $ \text{600}{{\,}^{\text{o}}}\text{C,} $ then:

Which of the following produces $ \text{C}{{\text{l}}_{2}} $ gas?

Lowest melting point chloride is:

$CH_3COCl$ does not react with

Which is extremely stable?

$ \text{C}{{\text{H}}_{\text{3}}}\text{COCl} $ does not react with:

In $ \text{S}{{\text{O}}_{\text{2}}} $ hybridisation is:

In $LCR$ circuit $ {f = \frac{ 50 }{ \pi} \, Hz, V = 50 \, volt, R = 300 \, \Omega}$ . If $L = 1 \, H$ and $C = 20 \, \mu \, C$, then voltage across capacitor is

Which one has highest binding energy per nucleon?

A block of mass $10\, kg$ is placed on rough horizontal surface whose coefficient of friction is $0.5$. If a horizontal force of $100 \,N$ is applied on it, then acceleration of the block will be :-

A person sees clearly at a distance of 100 cm, then power of lens used to see object at 40 cm is

Which is not the unit of electric field?

Quantum nature can prove :

Huygens wave theory cant explain: