List of practice Questions

Which one of the following pairs represents stereoisomerism ?
Two batteries,one of emf 18 V and internal resistance 2Ω and the other of emf 12 V and internal resistance 1Ω, are connected as shown.The voltmeter V will record a reading of :
For the network shown in the figure, the value of the current i is:
If a vector 2î+3ĵ+8 is perpendicular to the vector 4ĵ-4î+α,then the value of α is:

A 5-A fuse wire can withstand a maximum power of 1W incircuit.The resistance of the fuse wire is:

Copper has face-centered cubic (fcc) lattice with interatomic spacing equal to 2.54 Å.The value of the lattice constant for this lattice is:

The energy of the second Bohr orbit of the hydrogen atom is -328 kJ mol-1; hence the energy of the fourth Bohr orbit would be:

Which one of the following alkenes will react faster with H2 under catalytic hydrogenation conditions?(R=Alkyl substituent)

Two uniform metal rods of lengths $ {{l}_{1}} $ and $ {{l}_{2}} $ and linear coefficients of expansion $ {{\alpha }_{1}} $ and $ {{\alpha }_{2}} $ respectively are connected to form a single rod of length $ ({{l}_{1}}+{{l}_{2}}). $ When the temperature of the combined rod is raised by t ?C, the length of each rod increases by the same amount. Then $ \left( \frac{{{\alpha }_{2}}}{{{\alpha }_{1}}+{{\alpha }_{2}}} \right) $ is:
Secretin and cholecystokinin are digestive hormones. They are secreted in
A rifle shoots a bullet with a muzzle velocity of $ 500\,m{{s}^{-1}} $ at a small target 50 m away. To hit the target the rifle must be aimed: (Take $ g=10\,m{{s}^{-2}} $ )
A rigid container with thermally insulated walls contains a coil of resistance 100 $\Omega$, carrying current 1 A. Change in internal energy after 5 min will be
In a man, abducens nerve is injured. Which one of the following functions will be affected ?

Raffinose is a :

$KF$ combines with $HF$ to form $KHF_2$. The compound contains the species:
The molecular electronic configuration of $Be_2$ is:
Dacron is polymer of :
Which of the following silver salts is insoluble in water ?
Which of the following is deliquescent ?
Among the following sets of quantum numbers. Which one is incorrect for $4d$ electron ?
In a circuit L, C and R are connected in series with an alternating voltage source of frequency f .The current leads the voltage by 45$^{\circ}$. The value of C is
An electron moves at right angle to a magnetic field of $1.5 \times 10^{-2} T$ with a speed of $6 \times 10^{7} m / s$. If the specific charge of the electron is $1.7 \times 10^{11} C / kg$. The radius of the circular nath will he
Charles' law is represented mathematically as :
Cyanohydrin of which of the following forms lactic acid:
Dinitrogen pentoxide $(N_2O_5)$, a colourless solid, is prepared by :