List of practice Questions

For a transistor, the current ratio $'\beta'_{dc}$ is defined as the ratio of
A thin metal wire of length $'L'$ and uniform linear mass density $'\rho'$ is bent into a circular coil with $'O'$ as centre. The moment of inertia of a coil about the axis $XX'$ is
A molecule of water on the surface experiences a net
For a chemical reaction rate law is, rate $= k[A]^{2}[B]$ If $[A]$ is doubled at constant $[B]$, the rate of reaction
The number of pi-bonds present in benzoic acid molecule are
A uniform rod of length $'6L'$ and mass $'8 \,m'$ is pivoted at its centre $'C'$. Two masses $'m'$ and $'2m'$ with speed $2v$, $v$ as shown strikes the rod and stick to the rod. Initially the rod is at rest. Due to impact, if it rotates with angular velocity $'\omega'$ then $'\omega'$ will be
A galvanometer has resistance of $100\, \Omega$ and a current of $10 \,mA$ produces full scale deflection in it. The resistance to be connected in series, to get a voltmeter of range $50$ volt is
The stopping potential of the photoelectrons, from a photo cell is
How many isomers are possible for an alkane having molecular formula $C_{5}H_{12}$?
Which of the following oxides can act both as an oxidising agent as well as reducing agent ?
The reaction in which $2$ molecules of chlorobenzene reacts with metallic sodium in presence of dry ether forming diphenyl is an example of,
A pipe open at both ends and a pipe closed at one end have same length. The ratio of frequencies of their $P^{th}$ overtone is
In a hydrogen like atom, when an electron jumps from the $M$ - shell to the $L$ - shell, the wavelength of emitted radiation is $\lambda$. If an electron jumps from $N$-shell to the $L$-shell, the wavelength of emitted radiation will be :
Among the following, the one that is not a green house gas is :
The oxidation state of Cr in CrO6 is :

If three distinct numbers a,b and c are in GP and the equation ax2+2bx+c=0 and dx2+2ex+f=0 have a common root, then which of the following statements is correct?

Let f:[0,1]\(\rightarrow\)R be a function. suppose the function f is twice differentiable,f(0)=0=f(1) and satisfies f''(x)-2f'(x)+f(x)\(\geq\)ex,x\(\in\)[0,1], which of the following is true?
 

There are 720 permutations of the digits 1, 2 ,3 , 4, 5, 6 suppose these permutations are arranged from smallest to largest numerical values beginning from 123456 and and ending with 654321.Whihc of the following is correct?

Choose the word which is nearly opposite in meaning of the given word.
Cajole
In our company, we don’t accept such carelessly done work. ________
A person who does not believe in any religion
Find the synonym of the word IMPCCABLE:
Expansion
Each of the following questions consist of a word, followed by four words or group of words. Select the antonym of the word given below.
The scientist’s biography is a blatant ________ of facts.
A person who is in charge of a museum