Introduction

Q. What is electrode potential ?

1. It is the potential difference developed between two electrodes.
2. Electrode potential is the electromotive force of a galvanic cell built from a standard reference electrode and another electrode to be characterized.
   
3. None of these
4. It is the potential difference developed between the two electrolytes.

Q.

Is adiabatic process slow or fast?

Q. Which of following is not a function of salt bridge ?

1. To complete the circuit.
2. It provides anions into the oxidation and cations into reduction half cell.
3. To prevent intermixing of solutions.
   
4. None of these

Q. The degrees of freedom of Oxygen gas molecule at normal temperature is:

1. $3$
2. $5$
3. $6$
4. $4$

Q. In ice, each oxygen is surrounded by four oxygen atoms in ______ position.

1. Tetrahedral
2. Square planar
3. Trigond planar
4. Angular

Q. Which of the following statements is not true ?

1. The ratio of the mean speed to the rms speed is independent of the temperature.
2. The square of the mean speed of the molecules is equal to the square of rms speed at a certain temperature.
3. The difference between rms speed and mean speed at any temperature for different gases diminishes as larger and larger molar masses are considered.
4. Mean kinetic energy of the gas molecules at any given temperature is not independent of the mean speed.

Q.
The coordinate covalent bond in the structure is labelled as:

Q. STATEMENT – 1: Compressibility factor for hydrogen varies with pressure having a positive slope at all pressures when at 273 K.
STATEMENT – 2: Even at low pressures, repulsive forces dominate in hydrogen gas at 273 K.

1. Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1
2. Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1
3. Statement-1 is True, Statement-2 is False
4. Statement-1 is False, Statement-2 is True

Q.

Compare the properties of a solid, a liquid, and a gas with respect to:

(a) Intermolecular spaces

(b) Intermolecular forces

(c) Fluidity

(d) Number of free surfaces

(e) Compressibility

Q.

Write the formula and names of the compounds formed between :
Potassium and carbonate ions

Q. Which of the given statements is false regarding the galvanic cell?

1. The half cell electrode where oxidation takes place is called Anode.
2. The half cell electrode where reduction takes place is called Anode.
3. Salt bridge contains the solution of inert electrolyte
4. Both a and c

Q. The ligands in anti-cancer drug cisplatin are

1. $N{H}_3$ and Cl
2. $N{H}_{3}and{H}_{2}O$
3. Cl and $H_{2}O$
4. NO and Cl

Q. The number of ions formed, when tris(ethane-1, 2-diamine)copper$\left(II\right)$ sulphate is dissolved in water will be:

Q. Choose the correct statement regarding atomic structure of hydrogen atom?

1. It contain one proton
2. It contain 2 electron
3. It contain 1 neutron
4. All are correct

Q. Which of the following is a mixed salt?

1. $CaOC{l}_2$
2. $CuS{O}_4.4N{H}_3$
3. $AgCl.2N{H}_3$
4. $PtC{l}_4.5N{H}_3$

Q. In lead storage cell, anode is made up of

सीसा संचायक सेल में, एनोड किसका बना होता है?

1. Nickel
   
   निकल
2. Lead
   
   लेड
3. Grid of lead packed with PbO₂
   
   PbO₂ से भरे हुए लेड का ग्रिड
4. Copper
   
   कॉपर

Q. In Duma’s method of estimation of nitrogen, 0.55 g of an organic compound gave 60 mL of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be:
(aq. tension at 300 K = 15 mm)

1. $11.4\%$
2. $4.6\%$
3. $18.6\%$
4. $25\%$

Q. An ionic compound AB has $ZnS$ (Zinc blende) type structure. If the radius $A^{+}$ is $22.5pm$, then the ideal radius of $B^{-}$ would be

1. $54.35pm$
2. none of these
3. $100pm$
4. $145.16pm$

Q.

Write the chemical name for the ionic compound ${\mathbf{BaSO}}_{\mathbf{4}}$ and mention its molecular weight in brackets after the name.

Q. Which of following is not a function of salt bridge ?

1. To complete the circuit.
2. It provides anions into the oxidation and cations into reduction half cell.
3. To prevent intermixing of solutions.
   
4. None of these

Q.

What does Nernst equation tell you?

Q. Which of the following plot(s) is/are correct for a first order reaction?

1. I, II
2. II, I
3. I, II, III
4. I, III

Q. Which of the following molecule(s) has/have highest number of the features given below?
1. Have three traslational degrees of freedom.
2. Have two rotational degrees of freedom.
3. Triatomic and non linear
4. Triatomic and linear

1. $C{O}_2$
2. $S{O}_2$
3. $He$
4. $N_2$

Q. Paragraph for below question
नीचे दिए गए प्रश्न के लिए अनुच्छेद

In electrolytic cell external source of voltage is used to bring about a chemical change. One of the simplest electrolytic cell consists of two copper strips dipping in an aqueous solution of copper sulphate. If a DC voltage is supplied to the two electrodes, then copper ions are deposited on the cathode. While at anode, Cu is converted to Cu²⁺(aq).

At cathode : $C{u}^{2+}\left(aq\right)\stackrel{}{\to }Cu\left(s\right)$

At anode : $Cu\left(s\right)\stackrel{}{\to }C{u}^{2+}\left(aq\right)$

20 g strip of impure copper and 10 g strip of pure copper are dipped in 2 L, 0.1 M CuSO₄(aq) solution. 100 A current is passed for 241.25 s through the solution to cause electrolysis. Efficiency of current is 80%.

Answer the following two questions based on above stem. [Cu = 63.5 g/mol]

विद्युत अपघटनी सेल में रासायनिक परिवर्तन सम्पन्न करने के लिए बाह्य स्रोत की वोल्टता प्रयुक्त की जाती है। एक सरलतम विद्युत अपघटनी सेल को कॉपर सल्फेट के जलीय विलयन में दो कॉपर की पट्टियों को डुबोकर बनाया जाता है। यदि दोनों इलेक्ट्रॉडों पर DC वोल्टता प्रयुक्त की जाती है, तो कॉपर आयन कैथोड पर निक्षेपित होते हैं। जबकि एनोड पर Cu, Cu²⁺(aq) में परिवर्तित हो जाती है।

कैथोड पर : $C{u}^{2+}\left(aq\right)\stackrel{}{\to }Cu\left(s\right)$
एनोड पर : $Cu\left(s\right)\stackrel{}{\to }C{u}^{2+}\left(aq\right)$

20 g अशुद्ध कॉपर की पट्टी तथा 10 g शुद्ध कॉपर की पट्टी को 2 L, 0.1 M CuSO₄(aq) विलयन में डुबोया जाता है। विलयन में 241.25 s तक 100 A की धारा प्रवाहित करके विद्युत अपघटन किया जाता है। धारा दक्षता 80% है।

उपरोक्त अनुच्छेद पर आधारित निम्नलिखित प्रश्न के उत्तर दीजिए। [Cu = 63.5 g/mol]


What is the total weight of pure copper at cathode after the electrolysis?
विद्युत अपघटन के बाद कैथोड पर शुद्ध कॉपर का कुल भार क्या है?

1. 16.35 g
2. 10.635 g
3. 18.25 g
4. 12.35 g

Q. $180\text{g}$ of a compound containing $C,H$ and $O$ reacts fully with excess oxygen and produces $264\text{g}$ of $C{O}_2$ and $108\text{g}$ of $H_{2}O$. If the ratio of molar mass of the compound to the empirical formula mass is $6$ then find the molecular formula of given compound.

Q. The $pH$ of a solution of $N{H}_3$ is $11.43$. If its concentration is $0.40M$, then what is the value of $p{K}_b$?

1. 7.6
2. 10.12
3. 3.12
4. 4.74

Q. Which of the following is(are) true?

1. Bleaching agents undergoes oxidation and oxidises stain molecules to less coloured forms of the molecule.
2. Breathalyzer is the device used to detect presence ethanol in the breath is based on concept of redox.
3. Photographic film is made of AgBr grains in a gel spread.
4. Both b and c

Q. The preferential discharge theory explains the __________.

1. preferential use of an electrolyte.
2. preferential use of an electrode.
3. preferential discharge of current.
4. preferential discharge of ions.

Q. Which of the following is/are true when $NaCl$ is dissolved in Dimethyl sulfoxide (DMSO)?

1. $N{a}^{+}$remains unsolvated.
2. $C{l}^{-}$remains unsolvated.
3. $C{l}^{-}$ is solvated by the solvent.
4. Both (a) and (b)

Q. Wilkinson’s catalyst used as homogenous catalyst in hydrogenation of alkenes contains

1. Iron
2. Aluminum
3. Rhodium
4. Cobalt