Equilibrium

An equilibrium mixture contains 2.0 moles of A(g) and 4.0 moles of B(g). Now, 2.0 moles of A(g) is added in this equilibrium mixture and the system is allowed to re-achieve equilibrium at constant volume and temperature. Now, the volume of system is doubled at constant temperature. What should be the moles of B(g) at new equilibrium? The reaction involved is

$A\left(g\right)\stackrel{}{?}2B\left(g\right)$ .

For the reaction NH₄Cl(g) ⇌ NH₃(g) + HCl(g)

Arrange the following solutions in the decreasing order of pH :
(1) 0.1 NaOH
(2) 0.1 M NaCl
(3) 0.1 M H₂SO₄
(4) 0.1 M NH₄Cl

The increasing order of pk_b values of the following compounds is:
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At 1990K and 1 atm pressure, there are equal number of Cl₂ molecules and Cl atoms in the reaction mixture. The value of K_P for the reaction Cl_2(g) <!-- [if gte mso 9]><xml> </xml><![endif]-->  $?$ 2Cl_(g) under the above conditions is x × 10^-1. The value of x is______ (Rounded off to the nearest integer)

The equilibrium constant for the reaction
A(s) ⇌ M(s) + ½ O₂(g)
ln Kp = 4. At equilibrium, the partial pressure of O₂ is _____ atm. (Round off to the Nearest Integer).

0.25 M solution of pyridinium chloride C₅H₆N⁺Cl⁻ was found to have a pH of 2.699. if the value of Kₑ of pyridine C₅H₅N is a × 10⁻¹⁰, then the value of a is (given, 10⁻².⁶⁹⁹ = 2 × 10⁻³)

Given below are two statements:
Statement I: A unit formed by the attachment of a base to 1' position of sugar is known as nucleoside
Statement II: When nucleoside is linked to phosphorous acid at 5'-position of sugar moiety, we get nucleotide.

In the light of the above statements, choose the correct answer from the options given below:
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Match List - I with List - II
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Choose the correct answer from the options given below.
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The major product formed in dehydrohalogenation reaction of 2-Bromo pentane is Pent-2-ene. This product formation is based on?
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