Chemistry-
General
Easy
Question
‘x’ is prepared in the laboratory by heating an ammonium salt with caustic soda. Also ‘x’ have following properties: characteristic smell, it turns moist litmus paper blue
‘x’ can be identify as
- H2SO4
- NH3
- HNO3
- HCl
The correct answer is: NH3
x = NH3
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Reason: Ores are minerals from which metal can be extracted conveniently and economically.
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. The vibrations are simple harmonic in
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The mass M shown in the figure oscillates in simple harmonic motion with amplitude A. The amplitude of the point P is
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The displacement of a particle performing simple harmonic motion is given by, 
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Two simple harmonic motions are represented by 
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A 1000 Hz sound wave in air strikes the surface of a lake and penetrates into water. If speed of sound in water is 
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is
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An object producing a pitch of 400 Hz flies past a stationary person. The object was moving in a straight line with a velocity
. What is the change in frequency noted by the person as the person as the object files past him?
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A motor cycle starts from rest and accelerates along a straight path at 
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A piston fitted in cylindrical pipe is pulled as shown in the figure. A tuning fork is sounded at open end and loudest sound is heard at open length 13cm, 41 cm and 69 cm, the frequency of tuning fork if velocity of sound is 
is
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