For the following questions answer them individually
From the following, the least stable structure is :
Which of the following represents the correct trend for the mentioned property ?
A.$$F > P > S > B$$Â -Â First Ionization Energy
B.$$Cl > F > S > P$$ - Electron Affinity
C. $$K > Al > Mg > B$$ - Metallic character
D. $$K_{2}O > Na_{2}O > MgO > AL_{2}O_{3}$$ - Basic character
Choose the correct answer from the options given below :
80 mL of a hydrocarbon on mixing with 264 mL of oxygen in a closed U-tube undergoes complete combustion. The residual gases after cooling to 273 K occupy 224 mL. When the system is treated with KOH solution, the volume decreases to 64 ml. The formula of the hydrocarbon is:
Given below are two statements:
Statement I: Among $$[Cu(NH_{3})_{4}]^{2+},[Ni(en)_{3})]^{2+},[Ni(NH_{3})_{6}]^{2+}\text{ and }[Mn(H_{2}O)_{6}]^{2+},[Mn(H_{2}O)_{6}]^{2+}$$ has the maximum number of unpaired electrons.
Statement II : The number of pairs among $$\left\{[Ni(Cl_{4}]^{2-},[Ni(CO)_{4}]\right\},\left\{[NiCl_{4}]^{2-},[Ni(CN)_{4}]^{2-}\right\} and \left\{[Ni(CO)_{4}],[Ni(CN)_{4}]^{2-}\right\}$$ that contain only diamagnetic species is two.
ln the light of the above statements, choose the correct answer from the options given below:
Identify the correct statements.
A. Arginine and Tryptophan are essential amino acids.
B. Histidine does not contain heterocyclic ring in its structure.
C. Proline is a six membered cyclic ring amino acid.
D. Glycine does not have chiral centre.
E. Cysteine has characteristic feature of side chain as $$MeS-CH_{2}-CH_{2}-.$$
CHoose the correct answer from the options given below :
Consider the following reactions.
$$PbCl_{2}+K_{2}CrO_{4}\rightarrow A+2KCI$$
(Hot solution)
$$A+NaOH\rightleftharpoons B+Na_{2}CrO_{4}$$
$$PbSO_{4}+4CH_{3}COONH_{4}\rightarrow (NH_{4})_{2}SO_{4}+X$$
In the above reactions, A, Band X are respectively.
$$\text{MnO}_4^{2-}$$, in acidic medium, disproportionates to :
Given below are two statements:
Statement I : When an electric discharge is passed through gaseous hydrogen, the hydrogen molecules dissociate and the energetically excited hydrogen atoms produce electromagnetic radiation of discrete frequencies.
Statement II: The frequency of second line of Balmer series obtained from He+ is equal to that of first line of Lyman series obtained from hydrogen a tom.
ln the light of the above statements, choose the correct answer from the options given below :
An organic compound "P" of molecular formula $$C_{6}H_{12}O_{3}$$ gives positive Iodoform test but negative Tollen's test. When "P" is treated with dilute acid, it produces "Q". "Q" gives positive Tollen's test and also iodoform test. The structure of "P" is :
14.0 g of calcium metal is allowed to react with excess HCI at 1.0 atm pressure and 273 K
Which of the following statements is incorrect?
[Given : Molar mass in g $$\text{mol}^{-1}$$ of Ca-40, Cl-35.5, H-1]
