List of top Questions asked in Punjab PMET- 2009

Hinsberg reagent, $C_{6}H_{5}SO_{2}Cl$ does not react with

Correct order of freezing point of $ 1\,M $ solution of sucrose, $ KCl,\,BaCl_{2}$ and $ AlCl_{3}$ is

The given figure gives electric lines of force due to two charges $ q_{1}$ and $q_{2}$ . What are the signs of the two charges?

The main difference between formic acid and acetic acid is that formic acid is

$ {C6H5Cl +CH3Cl->[Na /dry\, ether] C6H5CH3 + 2NaCl}$ This reaction is an example of

A block is resting on a piston which is moving vertically with SHM of period $1\, s$ . At what amplitude of motion will the block and piston separate?

Two simple harmonic motions are given by $ x=A\sin (\omega t+\delta ) $ and $ y=A\sin \left( \omega t+\delta +\frac{\pi }{2} \right) $ act on a particle simultaneously, then the motion of particle will be

Three point charges $ q,\,-2q $ and $ -2q $ are placed at the vertices of an equilateral triangle of side $ a $ . The work done by some external force to increase their separation to $ 2a $ will be

Ordinary glass is formed by mixing of

$NH_{3}$ gas is passed over heated copper oxide. It oxidises to

Which of the following compounds shows optical isomerism?

$ {CH2 = CH2 ->[HBr] X} {->[A KOH] Y} { ->[{Na_2CO_3}][{I_2}] Z}$ In the above reaction sequence, $ Z $ is

Lucas test is given fastly by

Which polymers occur naturally ?

The shortest wavelength of the Brackett series of hydrogen like atom (atomic number $ =Z$) is the same as the shortest wavelength of the Balmer series of hydrogen atom. The value of $Z$ is

Two planets $ A $ and $ B $ have the same material density. If the radius of $ A $ is twice that of $ B $ , then the ratio of escape velocity $ \frac{v_{A}}{v_{B}}$ is

A radioactive element $ x $ converts into another stable element $ y $ . Half-life of $ x $ is $ 2h $ , initially only $ x $ is present. After time $ t $ , the ratio of atoms of $ x $ and $ y $ is found to be $ 1:4 $ , then $ c $ in hour is

Two sources are at a finite distance apart. They emit sound of wavelength $ \lambda $ . An observer situated between them on line joining the sources, approaches towards one source with speed $u$ , then the number of beats heard per second by observer will be

A man goes at the top of a smooth inclined plane. He releases a bag to fall freely and himself slides down on inclined plane to reach the bottom. If $u_{1}$ and $u_{2}$ are the velocities of the man and bag respectively, then

A closely wound flat circular coil of $25$ turns of wire has diaineter of $10\, cm$ which carries current of $4\, A$, the flux density at the centre of a coil will be

A car moves on a circular road. It describes equal angles about the centre in equal intervals of time. Which of the following statements about the velocity of the car is true?