List of practice Questions

The process to remove unwanted impurities from the ore is called -
The product obtained by treating $ {CH_3 - CH = CH_2 + HBr -> ?}$
The product of first nine terms of a GP is, in general, equal to which one of the following?
The process of removing lighter gangue particles by washing in a current of water is called
The process of respiration
The process of vulcanization of rubber was introduced was
The process of extraction of metal from its ores, is known as -
The process of excretion involves the
The process of conversion of soil nitrates into free $N_2$ is called and is carried out by bacteria
The process of decay of dead organic matter is known as
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