Choose the correct statements.
(A) Weight of a substance is the amount of matter present in it.
(B) Mass is the force exerted by gravity on an object.
(C) Volume is the amount of space occupied by a substance.
(D) Temperatures below \(0^{\circ} \mathrm{C}\) are possible in Celsius scale, but in Kelvin scale negative temperature is not possible.
(E) Precision refers to the closeness of various measurements for the same quantity.
Choose the correct answer from the options given below :

Consider the following two half-cell reactions along with the standard reduction potential given:
\(CO_2 + 6H^+ + 6e^- \rightarrow CH_3 OH + H_2 O \quad E°_{red} = 0.02\) V
\(\dfrac{1}{2} O_2 + 2H^+ + 2e^- \rightarrow H_2 O \quad E°_{red} = 1.23\) V
A fuel cell was set up using the above two reactions such that the cell operates under the standard condition of \(1\) bar pressure and \(298\) K temperature. The fuel cell works with \(80\%\) efficiency. If the work derived from the cell using \(1\) mol of \(CH_3 OH\) is used to compress an ideal gas isothermally against a constant pressure of \(1\) kPa, then the change in the volume of the gas, \(\Delta V = \) _____ m\(^3\). (nearest integer)
Given: \(F = 96500\) C mol\(^{-1}\)

Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of:

A protein \('A'\) contains \(0.30\, \%\) of glycine (molecular weight \(75).\) The minimum molar mass of the protein \('A'\) is \(.......\,\times 10^{3} \,g\, mol ^{-1}\) [nearest integer]

The molecular formula of second homologue in the homologous series of mono carboxylic acids is___________.

Consider the cell \(Pt _{( s )}\left| H _2( g , 1\,atm )\right| H ^{+}( aq , 1 M )|| Fe ^{3+}( aq ), Fe ^{2+}( aq ) \mid Pt ( s )\) When the potential of the cell is \(0.712\,V\) at \(298\,K\), the ratio \(\left[ Fe ^{2+}\right] /\left[ Fe ^{3+}\right]\) is \(.......\)(Nearest integer) Given: \(Fe ^{3+}+ e ^{-}= Fe ^{2+}, E ^{\circ} Fe ^{3+}, Fe ^{2+} \mid Pt =0.771\) \(\frac{2.303 RT }{ F }=0.06\,V\)

Correct statements among \(i\) to \(iv\) regarding silicones are \((i)\) they are polymers with hydrophobic character \((ii)\) they are biocompatible \((iii)\) in general, they have high thermal stability and low dielectric strength \((iv)\) usually they are resistant to oxidation and used as greases.

Correct order of basic strength of Pyrrole. ,Pyridine ,and Piperidine is _______.

If the boiling points of two solvents \(X\) and \(Y\) (having same molecular weights) are in the ratio \(2 : 1\) and their enthalpy of vaporizations are in the ratio \(1: 2\), then the boiling point elevation constant of \(X\) is \(\underline{ m }\) times the boiling point elevation constant of \(Y\). The value of \(m\) is \(.....\). (Nearest integer)

Electrolysis of 600 mL aqueous solution of NaCl for 5 min changes the pH of the solution to 12 . The current in Amperes used for the given electrolysis is ____. (Nearest integer).

A small cube of side \(1\) mm is placed at the centre of a circular loop of radius \(10\) cm carrying a current of \(2\) A. The magnetic energy stored inside the cube is \(\alpha \times 10^{-14}\) J. The value of \(\alpha\) is _______. (\(\mu_o = 4\pi \times 10^{-7}\) Tm/A, \(\pi = 3.14\))

If the coefficents of \({x^3}\) and \({x^4}\) in the expansion of  \(\left( {1 + ax + b{x^2}} \right){\left( {1 - 2x} \right)^{18}}\) in powers of \(x\) are both zero, then \( (a,b) \) is equal to 

The spin only magnetic moment of a divalent ion in aqueous solution (atomic number 29\()\) is ...... \(BM.\)