The reagents used for dehydration of alcohols are:
(A) Concentrated \(H _2 SO _4\)
(B) Phosphoric acid
(C) Alumina
(D) Anhydrous \(ZnCl _2\)
Choose the correct answer from the options given below:

Arrange the following in decreasing order of the \(\text{pK}_\text{b}\) value :
(A) \(\text{C}_2\text{H}_5\text{NH}_2\)
(B) \(\text{C}_6\text{H}_5\text{NHCH}_3\)
(C) \((\text{C}_2\text{H}_5)_2\text{NH}\)
(D) \(\text{C}_6\text{H}_5\text{NH}_2\)
(E) \((\text{CH}_3)_3\text{N}\)
Choose the correct answer from the options given below :

Select the correct statement.

The half life of a radioactive element is \(1 4 0\) days. After \(5 6 0\) days, one gram of the element will be reduced to:

Match List-I with List-I

LIST – I (Common Name)	LIST – II (IUPAC Name)
(A) oxalic acid	(I) Ethanedioic acid
(B) Adipic acid	(II) Alpha - hydroxy propanoic acid
(C) Lactic acid	(III) Hexanedioic acid
(D) Phthalic acid	(IV) Benzene-1,2-dicarboxylic acid

Choose the correct answer from the options given below:

Predict the correct sequence of reagents to carry out the following conversion:

Match List-l with List-ll

List-l (Rate expression)	List-II (Overall order of reaction)
(A) \(r=k[A]^{0.2}[B]^{0.3}[C]\)	(I) \(\frac{3}{10}\)
(B) \(r=k[A]^{0.2}[B]^{-0.3}[C]\)	(II) 1
(C) \(r=k[A][B]^{0.8}[C]^{-1}\)	(III) \(3 / 2\)
(D)\(r=k[A]^{0.2}[B]^{0.3}[C]^{0.5}\)	(IV) \(9 / 10\)

Choose the correct answer from the options given below:

A container is full of pure milk. From this container, one third of milk is taken out and then an equal amount of water is poured into the container to fill it. This operation is repeated four times. The final ratio of milk and water in the container is :

Answer the question on the basis of passage given below :
Adsorption is a surface phenomenon and it differs from absorption which occurs throughout the body of the substance that absorbs. In physiosorption the attractive forces are mainly van der Waal's forces while in chemisorption ionic/covalent bonds are formed between particles of adsorbent and adsorbate. The catalytic activity of finely divided iron in Haber's process of ammonia manufacture can be explained by adsorption theory. Adsorption being an exothermic process, the heat of adsorption is utilised in enhancing the rate of the reaction. Adsorption has many applications being used in gas masks, control of humidity, chromatograph separation, curing diseases etc.
Which of the following is not a surface phenomenon?

Match List I with List II.

LIST I	LIST II
A. Dodo	I. Australia
B. Quagga	II. Mauritius
C. Thylacine	III. Africa
D. Stellar's Sea cow	IV. Russia

Choose the correct answer from the options given below:

Choose the correct statements for a zero order reaction
(A) The rate of the reaction is independent of the initial concentration of the reactant
(B) The rate of the reaction increases linearly as the initial concentration of the reactant is increased
(C) The plot of concentration against time is a straight line with a positive slope
(D) The unit of rate constant is mol \(L^{-1}s^{-1}\)
Choose the correct answer from the options given below:

Applying the Kirchhoff's rule to the loop (a) ABCA and (b) BCDEB, two correct equations are given

(A) \(8-4 I_2-2\left(I_2+I_3\right)-I_1=0\)
(B) \(4-2\left(I_2+I_3\right)-4\left(I_2+I_3-I_1\right)=0\)
(C) \(4+2\left(I_2-I_3\right)-4\left(I_2+I_3-I_1\right)=0\)
(D) \(8+4 I_2+2\left(I_2-I_3\right)-I_1=0\)
Choose the correct answer from the options given below:

If \(\mathbb{Z}\) and \(\mathbb{R}\) set of integers and set of real numbers respectively, then match List I with List II.

List - I	List - II
(A) \(5 x-3<3 x+1, x \in \mathbb{Z}\)	(I) \(x \in(-\infty,-3)\)
(B) \(3 x+17 \leq 2(1-x), x \in \mathbb{R}\)	(II) \(x \in(-\infty,-1)\)
(C) \(13 x+17<2(1-x), x \in \mathbb{R}\)	(III) \(\{\ldots,-4,-3, \ldots, 0,1\}\)
(D) \(\frac{2 x+3}{5}-2>\frac{3(x-2)}{5}, x \in \mathbb{Z}\)	(IV) \(\{\ldots,-4,-3,-2\}\)

Choose the correct answer from the options given below: