The cell emf depends on:

Answer the question on the basis of passage given below :
A colloid is a heterogeneous system in which a substance is dispersed (dispersed phase) as fine particles in another substance called dispersion medium.
Their particle size is intermediate between that of pure solutions (less than 1 nm ) and suspensions (greater than 1000 nm ).
They are known for interesting properties such as enormous surface area, Tyndall effect, Brownian motion etc.
They are widely used in industries and day to day life.
Some prominent uses of colloids are those in smoke precipitators, purification of water, medicines, cleansers etc.
Stability of a colloid is intermediate between that of a solution and suspension. This stability can be attributed to _____________
A. Presence of charge on the particles of dispersed phase.
B. Prolonged mechanical stirring.
C. Solvation by the dispersion medium.
D. Brownian Motion.
E. Dialysis
Choose the correct answer from the options given below :

Read the passage carefully and answer the Questions:
Amines are classified as primary \(\left(1^{\circ}\right)\), secondary \(\left(2^{\circ}\right)\) and tertiary \(\left(3^{\circ}\right)\) depending upon the number of hydrogen atoms replaced by alkyl or aryl groups in ammonia molecules. Aliphatic amines are a stronger bases due to \(+I\) effect of an alkyl groups. Intermolecular hydrogen bonding in primary and secondary amines affects the boiling points of amines. The intermolecular association is more in primary amines than in secondary amines as there are more number of hydrogen atoms available for hydrogen bond formation. Nitro compounds are reduced to amines by passing hydrogen gas in the presence of finely divided nickel, palladium or platinum and also by reduction with metals in an acidic medium. Gabriel synthesis is used for the preparation of primary amines. Primary amines react with nitrous acid to give unstable diazonium-salts which can be used to synthesize a variety of compounds.
Identify the amine possessing least basic strength:

The formation of micelle takes place only :
(A) quad above a particular temperature called kraft temperature
(B) quad above a particular concentration called critical micelle concentration
(C) quad when catalyst is added
Choose the correct answer from the options given below :

Phenols are acidic in nature. Which of the following statements is incorrect about them?

Match the compounds given in List-I with the oxidation state of cobalt present in it given in

List-l (Compound)	List-II (Oxidation state of cobalt)
(A) \(\left[ Co ( NCS )\left( NH _3\right)_5\right]\left( SO _3\right)\)	(I) +3
(B) \(\left[ Co \left( NH _3\right)_4 Cl _2\right] SO _4\)	(II) +2
(C) \(Na _4\left[ Co \left( S _2 O _3\right)_3\right]\)	(III) \(0\)
(D) \(Co _2( CO )_8\)	(IV) \(+4\)

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Identify the optically active compounds from the following:
(A) \(\left[ Co ( en )_3\right]^{3+}\)
(B) trans \(-\left[ Co ( en )_2 Cl _2\right]^{+}\)
(C) cis- \(\left[ Co ( en )_2 Cl _2\right]^{+}\)
(D) \(\left[ Cr \left( NH _8\right)_5 Cl \right]\)
Choose the correct answer from the options given below:

Match the properties given in list-l with the metals given in list-ll

List-I (Property)	List-II (Metal)
(A) Element with highest second ionization enthalpy	(I) Co
(B) Element with highest heat of atomisation	(II) Cu
(C) M in \(M(\mathrm{CO})_6\)	(III) Zn
(D) Element with highest third ionization enthalpy	(IV) Cr

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The value of b for which the function \(f(x) = \sin x - bx + C\), where b and C are constants is decreasing for \(x \in R\) is given by

Two identical capacitors are joined in parallel, charged to a potential V and then separated and connected in series, i.e., negative plate of first is connected to positive plate of second :

A region has a uniform magnetic field in it. A proton enters the region with a velocity, making an angle of \( 45^\circ \) with the direction of the magnetic field. In this region the proton will move in :

A coordination compound \(CrCl _3 \cdot 4 H _2 O\) precipitates silver chloride when treated with silver nitrate. The molar conductance of its solution corresponds to a total of two ions.
What is the formula of the compound?

Tritium has a half life of \(12.5\) years against beta decay. What fraction of a sample of pure tritium disintegrates in 25 years ?