Arrange the following conformational isomers of n-butane in order of their increasing potential energy :

The Eu²⁺ ion is a strong reducing agent in spite of its ground state electronic configuration (outermost) : [Atomic number of Eu = 63]

The structures A and B formed in the following reaction are : [Ph = $$-$$C₆H₅]

In which one of the following sets all species show disproportionation reaction?

Match List - I with List - II

	List - I (Parmeter)		List - II (Unit)
(a)	Cell constant	(i)	$$S\,c{m^2}mo{l^{ - 1}}$$
(b)	Molar conductivity	(ii)	Dimensionless
(c)	Conductivity	(iii)	$${m^{ - 1}}$$
(d)	Degree of dissociation of electrolyte	(iv)	$${\Omega ^{ - 1}}{m^{ - 1}}$$

Choose the most appropriate answer from the options given below :

The major products A and B formed in the following reaction sequence are :

Which of the following is not an example of fibrous protein?

For the reaction given below :-



The compound which is not formed as a product in the reaction is a :

Spin only magnetic moment in BM of [Fe(CO)₄(C₂O₄)]⁺ is :

The incorrect expression among the following is :

Match List - I with List - II :

	List - I (Metal Ion)		List - II (Group of Qualitative analysis)
(a)	$$M{n^{2 + }}$$	(i)	Group - III
(b)	$$A{s^{3 + }}$$	(ii)	Group - IIA
(c)	$$C{u^{2 + }}$$	(iii)	Group - IV
(d)	$$A{l^{3 + }}$$	(iv)	Group - IIB

Choose the most appropriate answer from the options given below :

The major product of the following reaction is :

For the following sequence of reactions, the correct products are :

Identify correct A, B and C in the reaction sequence given below :

1.22 g of an organic acid is separately dissolved in 100 g of benzene (K_b = 2.6 K kg mol^$$-$$1) and 100 g of acetone (K_b = 1.7 K kg mol^$$-$$1). The acid is known to dimerize in benzene but remain as a monomer in acetone. The boiling point of the solution in acetone increases by 0.17$$^\circ$$C. The increase in boiling point of solution in benzene in $$^\circ$$C is x $$\times$$ 10^$$-$$2. The value of x is ______________. (Nearest integer) [Atomic mass : C = 12.0, H = 1.0, O =16.0]

The value of magnetic quantum number of the outermost electron of Zn⁺ ion is ______________.

The pH of a solution obtained by mixing 50 mL of 1 M HCl and 30 mL of 1 M NaOH is x $$\times$$ 10^$$-$$4. The value of x is ____________. (Nearest integer) [log 2.5 = 0.3979]

For the reaction A $$\to$$ B, the rate constant k(in s^$$-$$1) is given by

$${\log _{10}}k = 20.35 - {{(2.47 \times {{10}^3})} \over T}$$

The energy of activation in kJ mol^$$-$$1 is ____________. (Nearest integer) [Given : R = 8.314 J K^$$-$$1 mol^$$-$$1]

Sodium oxide reacts with water to produce sodium hydroxide. 20.0 g of sodium oxide is dissolved in 500 mL of water. Neglecting the change in volume, the concentration of the resulting NaOH solution is ______________ $$\times$$ 10^$$-$$1 M. (Nearest integer) [Atomic mass : Na = 23.0, O = 16.0, H = 1.0]

According to molecular orbital theory, the number of unpaired electron(s) in $$O_2^{2 - }$$ is :

The transformation occurring in Duma's method is given below :

$${C_2}{H_7}N + \left( {2x + {y \over 2}} \right)CuO \to xC{O_2} + {y \over 2}{H_2}O + {z \over 2}{N_2} + \left( {2x + {y \over 2}} \right)Cu$$

The value of y is ______________. (Integer answer)