Which of the following is/are not considered as transition elements?
Ag, Mo, Zn, Hg, W

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Werner in 1898, propounded his theory of coordination compounds. In coordination compounds metals show two types of linkages (valences)-primary and secondary. The primary valences are normally ionisable and are satisfied by negative ions. The secondary valences are non-ionisable. These are satisfied by neutral molecules or negative ions. The secondary valence is equal to the coordination number and is fixed for a metal. The ions or group bound by the secondary linkages to the metal have characteristic spatial arrangements corresponding to the different coordination numbers. Both double salts as well as complexes are formed by the combination of two or more stable compounds in stoichiometric ratio. However, they differ in the fact that double salts such as carnallite, Mohr's salt, potash alum etc. dissociate into simple ions completely when dissolved in water. But complex ions do not dissociate completely into simple ions.
Which of the following statement is correct as per Werner theory?

Which of the following statements are true regarding Lanthanoid elements?
i. \(\text{La}(\text{OH})_3\) is the basic hydroxide of Lanthanoids.
ii. \(\text{Zr}^{4+}\) and \(\text{Hf}^{4+}\) ions have almost similar ionic sizes.
iii. \(\text{Ce}^{4+}\) acts as an oxidising agent.
iv. Trivalent Lanthanoid ions are not coloured.
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Which transition metal ion is most stable against oxidation to its \(+3\) state?

The correct sequence of steps during the corrosion of iron is
(A) Ferrous ions are oxidized by atmospheric oxygen
(B) Hydrated ferric oxide (\(\text{Fe}_2\text{O}_3 \cdot \text{H}_2\text{O}\)) formed with production of \(\text{H}^{+}\) ions
(C) At a particular spot of iron object, oxidation takes place and that spot behaves as anode
(D) Electron released at anode moves through metal and reduces oxygen in the presence of \(\text{H}^{+}\)
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Which of the following statements about the rate of a chemical reaction are correct?
(A) The rate of reaction is always proportional to the concentration of reactants
(B) An exponential time course is followed by the first order reaction
(C) The unit of rate of reaction in the gaseous state is atm/s
(D) The concentration of reactant decreases exponentially with time for a zero order reaction
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Among the following reaction(s) which gives (give) tert-butylbenzene as the major product
(A)
(B)
(C)
(D)
(E)

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Flower colour in Antirrhinum sp. is an example of:

List-I (Name reaction.)	List-II (Reaction)
(A) Williamson ether synthesis	(I)
(B) Hydroboration oxidation	(II)
(C) Reimer-Tiemann reaction	(III)
(D) Friedel Craft Acylation reaction	(IV)

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Alien DNA can be introduced in the animal host cell by :

Young's double slit experiment is carried out using green, yellow, red, and blue lights one by one. Arrange the expected values of fringe widths (\( \beta \)) in increasing order :
(A) \( \beta_{Green} \)
(B) \( \beta_{Yellow} \)
(C) \( \beta_{Blue} \)
(D) \( \beta_{Red} \)
Choose the correct answer :

Match List-l with List-II

List-l	List-II
A. Methyl alcohol	I. Highly poisonous
B. Ethyl alcohol	II. Carbolic acid
C. Phenol	III. Highly soluble in water
D. Picric acid	IV. Turns blue litmus red

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If \(A^2-A+I=0\), then \(A^{-1}\) is equal to :