List of practice Questions

Glucose reacts with excess of phenyl hydrazine and forms

Ethyl bromide is industrially prepared from

The force of gravitation is

Consider a family of circles which are passing through the point (-1, 1) and are tangent to xaxis. If (h, k) are the co-ordinates of the centre of the circles, then the set of values of k is given by the interval

The set $S=\left\{1, 2, 3, \dots, 12\right\}$ is to be partitioned into three sets $A, B, C$ of equal size. Thus, $A\cup B\cup C=S, A\cap B = B\cap C = A \cap C=\phi.$ The number of ways to partition $S$ is

The largest interval lying in $\left(-\frac{\pi}{2}, \frac{\pi}{2}\right)$ for which the function $f \left(x\right)=4^{-x^2}+cos^{-1}\left(\frac{x}{2}-1\right)+log\left(cos\,x\right)$ is defined, is

In a geometric progression consisting of positive terms, each term equals the sum of the next two terms. Then the common ratio of this progression equals

If $sin^{-1}\left(\frac{x}{5}\right)+cos\,ec^{-1}\left(\frac{5}{4}\right)=\frac{\pi}{2} $ then a value of $x$ is

In the binomial expansion of $(a - b)^n, n \geq 5,$ a the sum of $5^{th}$ and $6^{th}$ terms is zero, then $\frac{a}{b}$ equals

The sum of the series ${^{20}C_0} - {^{20}C_1} + {^{20}C_2} - {^{20}C_3} + ..... - .... + {^{20}C_{10}}$ is

A pair of fair dice is thrown independently three times. The probability of getting a score of exactly $9$ twice is

Formation of RNA on DNA template is called

Sperms are nourished by

A light emitting diode $(LED) $ has a voltage drop of $2 \,V$ across it and passes a current of $10 \,mA$. When it operates with a $6 \,V$ battery through a limiting resistor $R$. The value of $R$ is :

What happen to the O dissociation curve of haemoglobin if the pH is decreased.

At high altitudes, RBC of human blood will

A charged particle (charge $q$) is moving in a circle of radius $R$ with uniform speed $v$. The associated magnetic moment $\mu$ is given by

A particle of mass $m$ moves in the $XY$ plane with a velocity ' $v$ ' along the straight line $A B$. If the angular momentum of the particle with respect to origin $O$ is $L _{ A }$ when it is at $A$ and $L_{B}$ when it is at $B$, then

The resistance of an ammeter is $13\, \Omega$ and its scale is graduated for a current upto $100\, A .$ After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto $750\, A$ by this meter . The value of shunt resistance is

The primary and secondary coils of a transformer have $50$ and $1500$ turns respectively. If the magnetic flux $\phi$ linked with the primary coil is given by $\phi=\phi_{0}+4t$, where $\phi$ is in weber, $\phi$ is time in second and $\phi_{0}$ is a constant, the output voltage across the secondary coil is

A particle executes simple harmonic oscillation with an amplitude $'a'$. The period of oscillation is $'T'$. The minimum time taken by the particle to travel half of the amplitude from the equilibrium position is

In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons respectively. The material is a/an

If the cold junction of a thermo-couple is kept at $0^{\circ} C$ and the hot junction is kept at $T^{\circ} C$, then the relation between neutral temperature $\left(T_{n}\right)$ and temperature of inversion $\left(T_{i}\right)$ is

A particle starting from the origin $(0,0)$ moves in a straight line in the $(x, y)$ plane. Its coordinates at a later time are $(\sqrt{3}, 3)$. The path of the particle makes with the $x$-axis an angle of

Which of the following cells does not respire ?