List of practice Questions

The orbital angular momentum of a 4d electron will be:

Draw the graphs of the equations \(x – y + 1 = 0 \)and \(3x + 2y – 12 = 0\). Determine the coordinates of the vertices of the triangle formed by these lines and the \(X\)-axis, and shade the triangular region.

Crystals of Bt toxin produced by some bacteria do not kill the bacteria themselves because -
A random variable X has the following probability distribution:
\(X\)012
\(P(X)\)\(\frac{25}{36}\)k\(\frac{1}{36}\)
If the mean of the random variable X is \(\frac{1}{3}\), then the variance is
Describe characteristics and uses of coke.

The following table gives the distribution of the life time of 400 neon lamps :

Life time (in hours)Number of lamps

1500 - 2000

14

2000 - 2500

56

2500 - 3000

60

3000 - 3500

86

3500 - 4000

74

4000 - 4500

62

4500 - 5000

48

Find the median life time of a lamp.

If f is a function satisfying \(f (x +y) = f(x) f(y)\text{ for all}\, x, y ∈ N\) such that f(1) = 3 and \(∑_{x = 1}^n f(x) = 120 \), find the value of n.
Why did Margie’s mother send for the County Inspector?
Which of the following lenses would you prefer to use while reading small letters found in a dictionary?
Which is not true about acetophenone ?
$\displaystyle\lim_{x\to0}\frac{e^{x^2} -cos x}{x^{2}}=$
$\int\left(\frac{x-a}{x}-\frac{x}{x+a}\right) dx$ is equal to
Which one of the following is SHM?
Which of the following gymnosperms is a bushy trailing shrub ?
When a same force of 5 N is applied to two balls A and B separately, they move along the direction of the force with a velocity of 5 ms and 10 ms respectively. The rate of work done on the ball A to that on B are in the ratio
Water flows through a horizontal pipe of diameter $2 \,cm$ at a speed of $3 \,cm \,s^{-1}$, The pipe has a nozzle of diameter $0.5 \,cm$ at its end. The speed of water emerging from the nozzle is
A cell divides every minute. At this rate of division it can fill a 100 ml. of beaker in one hour. How much time does it take to fill a 50 ml beaker ?
The reaction $ {P_4 + 3NaOH + 3H_2O -> 3NaH_2PO_2 + PH_3} $ is an example of
A 240 V,60 Hz voltage source is connected to resistor of 60Ω. Find the value of net power consumed by resistance over a complete cycle.
Certain amount of heat is given to 100 g of copper to increase its temperature by 21 $^{\circ}$C. if the same amount of heat is given to 50 g of water, then the rise in its temperature is (specific heat capacity of copper = 400 Jkg$^{-1} K^{-1}$ and that for water =4200Jkg$^{-1}ZK^{-1}$
If the 21st and 22nd terms in the expansion of $(1 + x)^{44}$, are equal, then x =
Benzonitrile can be prepared from benzaldehyde on treatment with
Intermolecular hydrogen bonding exists in
Draw a well-labelled diagram of an antibody molecule.

In the decomposition reaction AB\(_5\)(g)\(\rightleftharpoons\) AB\(_3\)(g) + B\(_2\)(g), at equilibrium in a 10-litre closed vessel at 227 C, 2 moles of AB\(_3\), 5 moles of B\(_2\) and 4 moles of AB\(_5\) are present. The equilibrium constant K\(_c\) for the formation of AB\(_5\)(g) is