Which of the following statements about hormones is not correct?

The role of cryolite in the metallurgy of aluminum is:-

Electrolysis of molten \(NaCl\) gives :

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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.
Identify the correct formula of Mohr's salt and potash alum, respectively.

Consider the following statements for the order of a reaction and choose the correct statements.
(A). The order of a reaction is an experimental quantity.
(B). Order can be zero.
(C). Order can be fractional value.
(D). Order is applicable to elementary as well as complex reactions.
Choose the correct answer from the options given below :

Glycosidic linkage is formed by :

The reduction of cyclohexanone with \(NaBH _4\) produces

Iron exhibits \(+2\) and \(+3\) oxidation states. Which of the following statements about iron is incorrect?
(A) Ferrous oxide is more basic in nature than the ferric oxide.
(B) Ferrous compounds are relatively more ionic than the corresponding ferric compounds.
(C) Ferrous compounds are less volatile than the corresponding ferric compounds.
(D) Ferrous compounds are more easily hydrolysed than the corresponding ferric compounds.
Choose the correct answer from the options given below :

The standard reduction potentials are given as :
\(\text{E}^{\circ}_{\text{K}^{+}/\text{K}} = -2.93 \text{ V}\)
\(\text{E}^{\circ}_{\text{Ag}^{+}/\text{Ag}} = +0.80 \text{ V}\)
\(\text{E}^{\circ}_{\text{Cu}^{2+}/\text{Cu}} = +0.34 \text{ V}\)
\(\text{E}^{\circ}_{\text{Ni}^{2+}/\text{Ni}} = -0.25 \text{ V}\)
\(\text{E}^{\circ}_{\text{Li}^{+}/\text{Li}} = -3.05 \text{ V}\)
Arrange the following metals in increasing order of their reducing power :
A. K
B. Ag
C. Cu
D. Ni
E. Li
Choose the correct answer from the options given below :

A 10 V battery having \( 3 \text{ } \Omega \) internal resistance is connected with a 200 V battery and a \( 35 \text{ } \Omega \) resistance as shown in the figure. The terminal potential drop at 10 V battery will be:

A diverging lens of glass (\( \mu = 1.5 \)) has both surfaces of the same radius of curvature (R). On immersion in a medium of refractive index (\( \mu = 1.8 \)), it will behave as:

Which one of the following has the lowest melting point ?

Read the following passage carefully and answer the given questions.
Insulin consists of two short polypeptide chains- chain A and chain B, that are linked together by disulphide bridges. Some strains of Bacillus thuringiensis produce proteins that kill certain insects such as lepidopterans, coleopterans and dipterans. Bt toxin protein is converted into an active form of toxin due to the alkaline pH of the gut which solubilise the crystals. Transgenic animals that produce useful biological products can be created by the introduction of the portion of DNA (or genes) which codes for a particular product such as human protein (alpha-1-antitrypsin) used to treat emphysema. Plants, bacteria, fungi and animals whose genes have been altered by manipulation are called Genetically Modified Organisms (GMO). GM plants have been useful in many ways. Genetic modification has: (i) made crops more tolerant to abiotic stresses. (ii) reduced reliance on chemical pesticides (pest-resistant crops). (iii) helped to reduce post harvest losses. (iv) increased efficiency of mineral usage by plants (this prevents early exhaustion of fertility of soil). (v) enhanced nutritional value of food.
The beetles that infest Bt cotton plant are killed: