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Hydrogen and S block Elements II

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Question 1

Sodium bicarbonate on heating decomposes to form sodium carbonate, CO₂ and water. If 0.2 moles of sodium bicarbonate is completely decomposed, how many moles of sodium carbonate is formed

Question 2

Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy?

Question 3

The commercial name for calcium oxide is:

Question 4

A metal M forms water soluble MSO₄ and inert MO. MO in aqueous solution forms insoluble M(OH)₂ soluble in NaOH. Metal M is:

Question 5

Hydrogen peroxide oxidises

in acidic medium but reduces

in alkaline medium. The other products formed are, respectively :

Question 6

When calcium carbide is added to water, the gas that is evolved is

Question 7

Select the correct option:
Which of the following elements show diagonal relationship with each other?
i) Be and Si
ii) Li and Mg
iii) B and Na
iv) B and Si
v) Li and Al
vi) Be and Al

Question 8

Which of the following arrangements is correct in respect of solubility in water?

Question 9

Which one of the following process will produce hard water?

Question 10

A₀/2 atoms of X(g) are converted into X⁺(g) by absorbing energy E₁. A₀/2 ions of X⁺(g) are converted into X^–(g) with release of energy E₂. Hence ionization energy and electron affinity of X(g) are is -