Among the following statements on the nitration of aromatic compounds, the false one is:

Which of the following alkyl halides will undergo \(S_N 2\) reaction most readily?

Which phenomenon occurs when an electric field is applied to a colloidal solution and electrophoresis is prevented?
(A) \quad Reverse osmosis takes place
(B) \quad Electroosmosis takes place
(C) \quad Dispersion medium begins to move in an electric field
(D) \quad Dispersion medium becomes stationary
Choose the correct answer from the options given below :

Match List - I with List - II.

List - I (Process)	List - II (Metal)
A. Electrolytic reduction	I. Iron
B. Bessemerization	II. Zinc
C. Smelting	III. Aluminium
D. Reduction from oxide	IV. Copper

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The chemical formula of mineral beryl is

Read the passage carefully and answer the questions
Nearly all the transition elements display typical metallic properties such as high tensile strength, ductility, malleability, high thermal and electrical conductivity and metallic lustre. 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. They have high enthalpies of atomization. lons of the same charge in a given series show progressive decrease in radius with increasing atomic number. However, the variation within a series is quite small. The filling of 4f before 5d orbital results in a regular decrease in atomic radii called Lanthanoid contraction which essentially compensates for the expected increase in atomic size with increasing atomic number. The net result of the lanthanoid contraction is that the second and the third d series exhibit similar radii (e.g., Zr 160 pm, Hf 159 pm) and have very similar physical and chemical properties. There is an increase in ionisation enthalpy along each series of the transition elements from left to right. The first ionisation enthalpy, in general, increases, but the magnitude of the increase in the second and third ionisation enthalpies for the successive elements, is much higher along a series. One of the notable features of a transition elements is the great variety of oxidation states these may show in their compounds.
Among \(\mathrm{Cr}(\mathrm{Z}=24), \mathrm{Co}(\mathrm{Z}=27), \mathrm{Mn}(\mathrm{Z}=25)\) and \(\mathrm{Fe}(\mathrm{Z}=26)\); which will show the maximum variety of oxidation states?

Hybridization of carbon atoms attached with halogens in haloalkanes \\& haloarenes are

The rate of a chemical reaction doubled for every \(10^{\circ} C\) rise in temperature. If the temperature is raised by \(50^{\circ} C\), the rate of reactions will be

Match List-I with List-II

List-I (Formula)	List-II (Physical Quantity)
(A) \( \epsilon = -L \frac{dI}{dt} \)	(I) Self inductance
(B) \( \epsilon = -M \frac{dI}{dt} \)	(II) Mutual inductance
(C) \( L = \frac{\Phi}{I} \)	(III) Mutual Induced emf
(D) \( M = \frac{\Phi}{I} \)	(IV) Self Induced emf

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Which one of the following cause of biodiversity loss is reflected in the phrase "need turns to greed"?

Arrange the given organisms involved in an ecosystem in correct sequence from lower to higher order.
(A) Fish
(B) Phytoplankton
(C) Man
(D) Zooplankton
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The values of \(a\) for which the function \(f(x)=a^x\) is increasing on \(R\) are given by :

The correct statement about 4 f-series elements is: