Question

A. 0.26 g of a metal hydride contains 0.02 g of hydrogen. What is the equivalent weight of
the metal ?

(A) 28
(B) 24
(C) 16
(D) 12

B. Which one is used to treat acid indigestion ?

(A) Be(OH)2e
(B) KOH
(C) Mg(OH)2
(D) Ca(OH)2

C. The oxidation number of carbon in C12H22O11 is

(A) 0
(B) +22
(C) +6
(D) –6
​

Answer 1

Answer:

c question answer

Explanation:

oxidation of carbon in C12 h22 o11 is zero

Answer 2

A. let M is atomic mass and x is valency of metal , E. then, metal hydride is EHx.

so, molar mass of EHx = (M + x) g/mol

in metal hydride,

one mole of metal hydride contains x moles of hydrogen.

so, (M + x)g of metal hydride contains x g of hydrogen.

or, 0.26g of metal hydride contains x/(M + x) × 0.26 g of hydrogen.

but given mass of hydrogen = 0.02g

or, x/(M + x) × 0.26 = 0.02

or, x/(M + x) = 1/13

or, 13x = M + x

or, 12x = M

or, M/x = 12

hence, equivalent weight = atomic mass/valency = M/x = 12.

B. Mg(OH)2 , milk of magnesia is used to treat acid indigestion.

C. zero, because C12H22O11 is covalent organic compound and we know, covalent bond is formed by sharing of electrons.