Given below are two statements :Statement I : In a typical transistor, all three regions emitter, base and collector have same doping level.Statement II : In a transistor, collector is the thickest and base is the thinnest segment.In the light of the above statements, choose the most appropriate answer from the options given below.
Heat energy of 735J is given to a diatomic gas allowing the gas to expand at constant pressure Each gas molecule rotates around an internal axis but do not oscillate The increase in the intemal energy of the gas will be :
A stone of mass $1 \, kg$ is tied to end of a massless string of length $1 m$ If the breaking tension of the string is $400\, N$, then maximum linear velocity, the stone can have without breaking the string, while rotating in horizontal plane, is :
A body weight W, is projected vertically upwards from earth's surface to reach a height above the earth which is equal to nine times the radius of earth The weight of the body at that height will be :
A microscope is focused on an object at the bottom of a bucket If liquid with refractive index $\frac{5}{3}$ is poured inside the bucket, then microscope have to be raised by $30\, cm$ to focus the object again The height of the liquid in the bucket is :
In Dumas method for the estimation of $N _2$, the sample is heated with copper oxide and the gas evolved is passed over :
When a hydrocarbon A undergoes complete combustion it requires 11 equivalents of oxygen and produces 4 equivalents of water. What is the molecular formula of $A$?
Arrange the following orbitals in decreasing order of energy A. $n=3, l =0, m =0$ B. $n =4, l =0, m =0$ C. $n =3, l =1, m =0$ D. $n =3, l =2, m =1$ The correct option for the order is :
Which of the following compounds are not used as disinfectants? A. ChloroxylenolB. BithionalC. VeronalD. ProntosilE. TerpineolChoose the correct answer from the options given below:
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)Assertion (A): The first ionization enthalpy of $3d$ series elements is more than that of group 2 metalsReason (R): In $3d$ series of elements successive filling of d-orbitals takes placeIn the light of the above statements, choose the correct answer from the options given below :
Match List I with List II
Choose the correct answer from the options given below:
Evaluate the following statements for their correctness A. The elevation in boiling point temperature of water will be same for $01 \,M \,NaCl$ and $01\, M$ urea B. Azeotropic mixtures boil without change in their compositionC. Osmosis always takes place from hypertonic to hypotonic solution D. The density of $32 \% H _2 SO _4$ solution having molarity $409\, M$ is approximately $126\, g mL ^{-1}$ E. A negatively charged sol is obtained when KI solution is added to silver nitrate solutionChoose the correct answer from the options given below :
Given below are two statements : Statement I : Upon heating a borax bead dipped in cupric sulphate in a luminous flame, the colour of the bead becomes green.Statement II : The green colour observerd is due to the formation of copper(I) metaborate.In the light of the above statements, choose the most appropriate answer from the options given below :
Compound $A , C _5 H _{10} O _5$, given a tetraacetate with $AC _2 O$ and oxidation of $A$ with $Br _2- H _2 O$ gives an acid, $C _5 H _{10} O _6$ Reduction of $A$ with $HI$ gives isopentane The possible structure of $A$ is:
Given below are two statements:Statement I : H2O2 is used in the synthesis of CephalosporinStatement II : H2O2 is used for the restoration of aerobic conditions to sewage wastes.In the light of the above statements, choose the most appropriate answer from the options given below :
Which of the following elements have half-filled f-orbitals in their ground state?(Given : atomic number $Sm =62 ; Eu =63 ; Tb =65 ; Gd =64, Pm =61$ )A. $Sm$B. $Eu$C. $Tb$D. $Gd$E. $Pm$Choose the correct answer from the options given below :
The Lewis acid character of boron tri halides follows the order :
The normal rain water is slightly acidic and its $pH$ value is $56$ because of which one of the following ?
Which one of the following statements is incorrect?
The element playing significant role in neuromuscular function and interneuronal transmission is :
Let $a_1, a_2, a_3, \ldots$ be an AP If $a_7=3$, the product $a_1 a_4$ is minimum and the sum of its first $n$ terms is zero, then $n !-4 a_{n(n+2)}$ is equal to :
Let $H$ be the hyperbola, whose foci are $(1 \pm \sqrt{2}, 0)$ and eccentricity is $\sqrt{2}$. Then the length of its latus rectum is _____
The number of values of $r \in\{p, q, \sim p, \sim q\}$ for which $((p \wedge q) \Rightarrow(r \vee q)) \wedge((p \wedge r) \Rightarrow q)$ is a tautology, is :
