The product Y is

• p-chloro nitrobenzene

• o-chloro nitrobenzene

• m-chloro nitrobenzene

• o, p-dichloro nitrobenzene

End product of the following reaction is

Following compounds are respectively ..... geometrical isomers

• P - cis ;Q - cis ; R - trans

• P - cis ; Q - trans ; R - trans

• P - trans ; Q - cis ; R - cis

• P - cis ; Q - trans ; R - cis

Which is more basic oxygen in an ester?

• Carbonyl oxygen, α

• Carboxyl oxygen, β

• Equally basic

• Both are acidic oxygen

Match the following and choose the correct option given below:-

• A - I; B - II; C - IV; D - III

• A - II; B - III; C - I ; D - IV

• A - IV; B - III; C - II; D - I

• A - IV; B - II; C - III; D - I

16.

B can be obtained from halide by van- Arkel method. This involves. This involves reaction

• 2BI₃ $\underset{\mathrm{filament}}{\overset{\mathrm{Red} \mathrm{hot} \mathrm{W} \mathrm{or} \mathrm{Ta}}{\to }}$ 2B + 3I₂

• 2BCl₃ + 3H₂ $\underset{\mathrm{filament}}{\overset{\mathrm{Red} \mathrm{hot} \mathrm{W} \mathrm{or} \mathrm{Ta}}{\to }}$ 2B +6HCl

• Both (a) and (b)

• None of the above

The density of solid argon is 1.65 g per cc at -233°C. If the argon atom is assumed to be a sphere of radius 1.54 × 10^-8 cm, what percent of solid argon is apparently empty space? (Ar = 40)

• 16.5%

• 38%

• 50%

• 62%

Acid hydrolysis of ester is first order reaction and rate constant is given by

k = $\frac{2.303}{\mathrm{t}} \log \frac{{\mathrm{V}}_{\infty } - {\mathrm{V}}_0}{{\mathrm{V}}_{\infty } - {\mathrm{V}}_{\mathrm{t}}}$

where, V₀, V_t and V_∞ are the volume of standard NaOH required to neutralise acid present at a given time, if ester is 50% neutralised then

• V_∞ = V_t

• V_∞ = (V_t - V₀)

• V_∞ = 2V_t - V₀

• V_∞ = 2V_t + V₀

Which of these ions is expected to be coloured in aqueous solution?

I. Fe³⁺

II. Ni²⁺

III. Al³⁺

• I and II

• II and III

• I and III

• I, II and III

Consider the following reaction,

The reaction is of first order in each diagram, with an equilibrium constant of 10⁴. For the conversion of chair form to boat form ${\mathrm{e}}^{-{\mathrm{E}}_{\mathrm{a}}/\mathrm{RT}}$ = 4.5 × 10^-8 m at 298 K with pre-exponential factor of 10¹² s^-1. Apparent rate constant (=k_A/ k_B) at 298 K is

• 4.35 × 10⁴ s^-1

• 4.35 × 10⁸ s^-1

• 4.35 × 10^-8 s^-1

• 4.35 × 10¹²s^-1