\(\text{CH}_3-\text{CH}(\text{Br}) - \text{CH}_2 - \text{CH}_3 \xrightarrow{\text{alc. KOH}} \text{A} \xrightarrow{\text{Br}_2} \text{CH}_3-\text{CH}(\text{Br}) - \text{CH}(\text{Br}) - \text{CH}_3 \text{(B)}\)
\(\text{(B)} \xrightarrow{\text{alc. KOH}} \text{CH}_3-\text{C} = \text{C} – \text{CH}_3 \text{(C)}\)
\(\text{(C)} \xrightarrow{\text{Hg}^{2+}/\text{H}^+\atop \text{H}_2\text{O}} \text{D}\)
A and D respectively are :

The reagents used for dehydration of alcohols are:
(A) Concentrated \(H _2 SO _4\)
(B) Phosphoric acid
(C) Alumina
(D) Anhydrous \(ZnCl _2\)
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Match List-I with List-II

List-I	List-II
(A) D	(I) Loss of blood clotting
(B) C	(II) Rickets
(C) \(B_6\)	(III) Scurvy
(D) K	(IV) Convulsions

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Read the passage carefully and answer the following questions
There are mainly four series of the transition metals, \(3 d\) series ( \(S c\) to Zn), \(4 d\) series (Y to Cd), 5d series (La and Hf to Hg) and 6d series which has \(A c\) and elements from Rf to Cn. The two series of the inner transition metals; \(4 f\) (Ce to Lu) and \(5 f\) (Th to Lr) are known as lanthanoids and actinoids respectively. Their chemical properties are transitional between those of \(s\) and p-block elements. The transition metals (with the exception of Zn, Cd and Hg) are very hard and have low volatility. Their melting and boiling points are high. Transition metals have incomplete d subshell either in neutral atom or in their ions. With partly filled d orbitals these elements exhibit certain characteristic properties such as display of a variety of oxidation states, formation of coloured ions and entering into complex formation with a variety of ligands. The transition metals and their compounds are known for their catalytic activity.
In series Sc to Zn, the lowest enthalpy of atomization is shown by

Given that \(\text{E}^{\circ}_{\text{Ni}^{2+}/\text{Ni}} = -0.25 \text{ V}\) and \(\text{E}^{\circ}_{\text{Cu}^{2+}/\text{Cu}} = +0.34 \text{ V}\).
The EMF of the cell containing nickel and copper electrodes in 1 M solution is

What is the product of the following reaction?

Which of the following compounds are aromatic alcohols?
(A)

(B)

(C)

(D)

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Which one of the following is not the invasive alien species?

The intercept made by the plane \(2 x-3 y+5 z+4=0\) on \(z\)-axis is :

The oxidation number of Co in the complex \(\left[ Co \left( H _2 NCH _2 CH _2 NH _2\right)_3\right]_2\left( SO _4\right)_3\) is:

Arrange the given organisms involved in a food chain in correct sequence ?
(A) Fish
(B) Phytoplankton
(C) Man
(D) Zooplankton
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The total cost \(C(x)\) associated with the production of \(x\) units of an item is given by
\(\ C(x)=0.001 x^3+0.06 x^2+20 x+500\).
The marginal cost when 10 units are produced is:

A flask contains Argon and Chlorine in the ratio of 2:1 by mass. The temperature of the mixture is \( 27^{\circ}\text{C} \). The ratio of root mean square speed of molecules of two gases will be : (atomic mass of Argon = 40 u and molecular mass of Chlorine = 71 u)