IIT-JEE Exam

The total number of alkenes possible by dehydrobromination of 3-bromo-3-cyclopentylhexane using
alcoholic KOH is

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IIT-JEE Other Question

To an evacuated vessel with movable piston under external pressure of 1 atm, 0.1 mol of He and 1.0 mol of
an unknown compound (vapour pressure 0.68 atm. at 0oC) are introduced. Considering the ideal gas
behaviour, the total volume (in litre) of the gases at 0oC is close to A police car with a siren of frequency 8 kHz is moving with uniform velocity 36 km/hr towards a tall
building which reflects the sound waves. The speed of sound in air is 320 m/s. The frequency of the siren
heard by the car driver is
(A) 8.50 kHz (B) 8.25 kHz
(C) 7.75 kHz (D) 7.50 kHZ