List of practice Questions

The negation of the statement "72 is divisible by 2 and 3" is
A bag contains 17 tickets numbered from 1 to 17. A ticket is draw at random, then another ticket is drawn at random, then another ticket is drawn without replacing the first one . The probability that both the tickets may show even numbers is
A flashlight has 10 batteries out of which 4 are dead. If 3 batteries are selected without replacement and tested, then the probability that all 3 are dead is
A metallic sphere is placed in a uniform electric field. The line of force follow the path (s) shown in the figure as
The potential energy of a simple harmonic oscillator of mass $2\, kg$ at its mean position is $5\, J.$ If its total energy is $9\, J$ and amplitude is $1\, cm$. then its time period is
Why is the heat evolved in neutralization of HF is highest
The number of the distinct real roots of the equation $\begin{vmatrix}\sin x&\cos x&\cos x\\ \cos x&\sin x&\cos x\\ \cos x&\cos x&\sin x\end{vmatrix} = 0 $ , in the interval $ - \frac{\pi}{4} \le x \le \frac{\pi}{4}$ is
During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
Which one of the following group is nutritionally essential amino acids?
From a collection of $20$ consecutive natural numbers, four are selected such that they are not consecutive. The number of such selections is
The movement of Pollen tube is:
Consider the following statements: Hardy Weinberg equilibrium is maintained in a population where (i) random mating is there (ii) there is no natural selection (iii) a population may gain or loose alleles Which of the statements given above is/are correct?
The antibody produced in allergic reaction is:
The species, which has the bond order same as that of $F_2$, molecule is
Dead burnt plaster is
Identify the major product that is obtained on treatment of \(CH_3CH_2CH(F)CH_3\) with \(CH_3O^-/CH^3OH\) is
Two spheres $P$ and $Q$, each of mass $200\, g$ are attached to a string of length one metre as shown in the figure. The string and the spheres are then whirled in a horizontal circle about $O$ at a constant angular speed. The ratio of the tension in the string between $P$ and $Q$ to that of between $P$ and $O$ is $(P$ is at mid-point of the line joining $O$ and $Q$ )
The ratio of the half-life time $ (t_{1/2}) $ , to the three quarter life-time, $ (t_{3/4}) $ , for a reaction that is second order
The value of magnetic quantum number of the last electron of " $ Na $ " is
A fast train leaves Chennai to Bengaluru and at the same point in time a slow train leaves from Bengaluru to Chennai. The fast train moves at a speed of 60 km /hr and the slow train moves at half of the speed of the fast train. Both these trains meet at a point after some time. Which of these trains are further away from Chennai when they meet? (Do not consider the length of the train)
Unmesh is facing Jayesh and when he hears a bell ring he turns towards Rajesh by making 90 shift. He continues to do this every time the bell rings. If the bell rang 3926 times, whom will Unmesh be facing?
sitting/standing arrangment
two circles then shaded area is represented
If A and B are represented by the above diagrams as two circles then shaded area is represented as?
The figure below has been made by folding paper as given in one of the options, choose the correct option.
folding paper
The figure given has been made by folding paper as given in one of the options, choose the correct option
folding paper
Which of the below pendulums will move the slowest, if each one of them is displaced by an angle of \(60 \degree\) from the center?