List of practice Questions

Choose the correct enzyme - substrate pair.
A ball is dropped from a spacecraft revolving around the earth at a height of 120 km. What will happen to the ball?
What will be the formula of mass of the earth in terms of g, R and G ?
The density of the material of a cube can be estimated by measuring its mass and the length of one of its sides. If the maximum error in the measurement of mass and length are 0.3% and 0.2% respectively, the maximum error in the estimation of the density of the cube is approximately
Nylon-66 is a polyamide obtained by the reaction of
An electron of mass m and charge e is accelerated from rest through a potential difference V in vacuum. Its final velocity will be
An element (atomic mass $100 \,g /\, mol$ ) having $BCC$ structure has unit cell edge $400\, pm$. The density of element is (No. of atom in $BCC ( Z )=2$ ).
Commonly used antiseptic -Dettol- is a mixture of
Which of the following has zero dipole moment?
A motor
At the mid point along the length of a long solenoid, the magnetic field is equal to x. If the length of the solenoid is doubled and the current is reduced to half, the field at the new mid point will be nearest to
$1000$ drops of water of radius $1\,cm$ each carrying a charge of $10\, esu$ combine to form a single drop. The capacitance of combined drop increases
Which of the following bonds has the highest energy?
Boron compounds behave as Lewis acids, because of their
Two parallel wires carry electric current in same direction. The wires
In India electricity is supplied for domestic use at $220\, V$. It is supplied at $110 \,V$ in USA. If the resistance of a $60 \,W$ bulb for use in India is $R$, the resistance of a $60 \,W$ bulb for use in USA will be
An example of a non ohmic device is
Which of the following is the correct equation?
A particle starts with S.H.M. from the mean position as shown in the figure. Its amplitude is $A$ and its time period is $T$. At one time, its speed is half that of the maximum speed. What is this displacement?
What will be the longest wavelength line in Balmer series of spectrum?
A red flower seen through a green glass looks
Four resistors of $100\,\Omega$ each are connected in the form of a square. Then the effective resistance along the diagonal point is
Resistance of an ideal ammeter is
An electron in motion is associated with
80S ribosomes have two sub units which are: