The atomic number of the element from the following with lowest \(1^{\text {st }}\) ionisation enthalpy is :

Given below are two statements:
Statement I: The correct order of electronegativity of fluorine, oxygen and nitrogen is \(F > O > N\).
Statement II: The oxidation state of oxygen in OF\(_2\) is \(+2\) and in Na\(_2\)O is \(-2\).
In the light of the above statements, choose the correct answer from the options given below

Appearance of blood red colour, on treatment of the sodium fusion extract of an organic compound with \(\mathrm{FeSO}_4\) in presence of concentrated \(\mathrm{H}_2 \mathrm{SO}_4\) indicates the presence of which element/s?

Given below are two statements :
Statement (I) : Potassium hydrogen phthalate is a primary standard for standardisation of sodium hydroxide solution.
Statement (II) : In this titration phenolphthalein can be used as indicator.
In the light of the above statements, choose the most appropriate answer from the options given below:

Electricity is passed through an acidic solution of \( Cu^{2+} \) till all the \( Cu^{2+} \) was exhausted, leading to the deposition of 300 mg of Cu metal. However, a current of 600 mA was continued to pass through the same solution for another 28 minutes by keeping the total volume of the solution fixed at 200 mL. The total volume of oxygen evolved at STP during the entire process is ______ mL.
(Nearest integer)
[Given :
\(Cu ^{2+}( aq )+2 e ^{-} \rightarrow Cu ( s ) E _{\text {red }}^0=+0.34 V\)
\(O _2(g)+4 H ^{+}+4 e ^{-} \rightarrow 2 H _2 O E _{ red }^0=+1.23 V\)
Molar mass of \(Cu =63.54~g~mol ^{-1}\)
Molar mass of \(O _2=32~g~mol ^{-1}\)
Faraday Constant \(=96500~C~mol ^{-1}\)
Molar volume at \(S T P=22.4 L\) ]

At constant volume, \(4\; mol\) of an ideal gas when heated from \(300\; \mathrm{K}\) to \(500\; \mathrm{K}\) changes its internal energy by \(5000\; \mathrm{J}\). The molar heat capacity at constant volume is ............... \(\mathrm{J\,mol}^{-1} \, \mathrm{K}^{-1}\)

Consider all the structural isomers with molecular formula \(C _5 H _{11} Br\) are separately treated with KOH (aq) to give respective substitution products, without any rearrangement. The number of products which can exhibit optical isomerism from these is_________ .

Which of the following is NOT an example of fibrous protein?

Consider the two sets :\(A=\{m \in R:\) both the roots of \(x^{2}-(m+1) x+m+4=0\) are real \(\}\) and \(B=[-3,5)\)
Which of the following is not true?

Total number of alkali insoluble solid sulphonamides obtained by reaction of given amines with Hinsberg's reagent is __________
Aniline, N-Methylaniline, Methanamine,
N, N-Dimethylmethanamine,
N-Methyl methanamine, Phenylmethanamine,
N-propylaniline, N-phenylaniline,
N, N-Dimethylaniline, Allyl amine,
Isopropyl amine

A charge \(q\) is placed at the center of one of the surface of a cube. The flux linked with the cube is _______.

Consider a mixture 'X' which is made by dissolving 0.4 mol of \( [Co(NH_{3})_{5}SO_{4}]Br \) and 0.4 mol of \( [Co(NH_{3})_{5}Br]SO_{4} \) in water to make 4 L of solution. When 2 L of mixture 'X' is allowed to react with excess of \( AgNO_{3} \), it forms precipitate 'Y'. The rest 2 L of mixture 'X' reacts with excess \( BaCl_{2} \) to form precipitate 'Z'. Which of the following statements is CORRECT.

Match List\(-I\) with List\(-II\).

List\(-I\)	List\(-II\)
\(A\) \(16\,g \text { of } CH _{4( g )}\)	\(I\) Weighs \(28\,g\)
\(B\) \(1\,g \text { of } H _{2( g )}\)	\(II\) \(60.2 \times 10^{23}\) electrons
\(C\) \(1\,mole \text { of } N _{2( g )}\)	\(III\) Weighs \(32\,g\)
\(D\) \(0.5\,mol\) of \(SO _{2( g )}\)	\(IV\) Occupies \(11.4\,L\) volume at STP

Choose the correct answer from the options given below: