List of practice Questions

The process of diffusion is involved in
The probability that a man hits a target is p = 0.1. He fires n = 100 times. The expected number n of times he will hit the target is :
The probability that A speaks truth is $\frac{4}{5}$ , while the probability for B is $\frac{3}{4}$. The probability that they contradict each other when asked to speak on a fact is
The probability that a two digit number selected at random will be a multiple of ?
The probability of safe arrival of one ship out of five is $\left(\frac{1}{5} \right)$ . The probability of safe arrival of atleast 3 ship is:
The probability that a leap year will have 53 Sundays or 53 Mondays is
The probability that a man A will be alive for 20 more years is $\frac{3}{5}$ and the probability that his wife will be alive for 20 more years is $\frac{2}{3} $, The probability that only one will be alive at the end of 20 years is
The probability of occurrence of an event A is 0.3 and that of occurrence of an event B is 0.4. If A and B are mutually exclusive, then the probability that neither A occurs nor B occurs is:
The probability of having a king and a queen when the two cards are drawn at random from a pack of 52 cards is:
The probability of drawing an honour card from a well shuffled pack of 52 playing cards is (K,Q,J,A are honour cards)
The probability of getting at least 2 heads, when an unbiased coin is tossed 6 times is
The probability of guessing correctly at least $8$ out of $10$ answers on a true-false type examination is
The probability of getting tail, when an unbiased coin is tossed is
The probability of an event lies in
The probability of drawing a card which is at least a spade or a king from a well shuffled pack of cards is
The principal value of $\sin^{-1} \left(\sin \frac{2\pi}{3}\right) $ is:
The principle involved in paper chromatography is
The probability density plots of $1s$ and $2s$ atomic orbitals are given in figures.
The density of dots in a region represents the probability density of finding electrons in the region. On the basis of the above diagram, which of the following statements is incorrect?
The principal functional group in the compound $BrCH_2CH(OH)CH_2COCH_2NO_2$ is
The principal gas evolved from sludge digestion tank is
The principal value of $\sin^{-1} \left( - \frac{\sqrt{3}}{2} \right)$ is :
The primary treatment of waste water involves the removal of
The primary valency of iron in $K_4[Fe(CN)_6$ is
The primary winding of a transformer has 100 turns and its secondary winding has 200 turns. The primary is connected to an A.C. supply of 120 V and the current flowing in it is 10 A. The voltage and the current in the secondary are
The prime source of taxonomic studies is