Question paper, Acid, Base chemistry, science , SSC

Question paper I           Acid Base Chemistry

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Solve any 15 questions from 1to  18. Each question carry 1 mark. Total 30 marks.

Q.1:-  The characteristic properties of an acid is due to the presence of                

1. hydride ions   2. hydroxyl ions  3. hydronium ions    4. oxide ions

Q.2:-   A strong acid in solution is ___________.

1. mostly molecules   2. mostly ions    3. both molecules & ions

4. less water

Q3:   A weak acid in solution is ___________.

1. mostly molecules     2. mostly ions         3.   both molecules and ions       4. less water

Q.4:-   The pH of a carbonated drink is ___________.

1. less than 7     2. more than 7    3.  equal to 7      4.   approximately 7.8

Q.5:-   An acid is ___________.

1.  a proton donor      2.   a proton acceptor

3.  electron donor       4.   electron acceptor

Q.6:-   The drying of milk of lime (white washing) is due to the action of ___________.

1.  oxygen in air      2.        nitrogen in air

3.  CO2 in air          4.          hydrogen in air

Q.7:-   A salt derived from a strong base and a weak acid will give a salt that is _______.

1.  acidic   2. Basic                     3.  neutral           4.  volatile

Q.8:-   When litmus is added to a solution of borax it turns___________.

1. red   2. Pink              3. remains colourless      4.  blue

Q.9:-   Which of the following is not a mixed salt?

1.  K.Ca.PO4      2. Ca(OCl)Cl     3.           Na.K.CO3      4.        KCl

Q.10:-   Which is a soluble base in water?

1.  Fe(OH)3     2.  Cu(OH)2        3.           Zn(OH)2        4.   NaOH

Q.11:-   Which of the following is a weak base?

1.  NaOH         2.      KOH              3.          NH4OH          4.        Ca(OH)2

Q.12:-   Choose the acid salt from the following:

1.  NaNO3    2.         Na2SO4         3. NaHSO4          4.             Na2CO3

Q.13:-   In the following reaction, identify the products

NaHCo3  + HCl       Þ

1.  sodium chloride and water      2. water and carbon dioxide

3.  sodium carbonate, carbon dioxide and water

4.  sodium chloride, carbon dioxide and water

Q.14:-   Which of the following ionic species exist in a neutralization reaction?

1.  HCl-    2.  H+       3.        H2O         4.   H3O+

Q.15:- When HI dissolves in water, which ions are formed?
a. H₃O⁺ and H₂I⁺       b. H₃O⁺ and I^-         c. H₃O⁺ and OH^-
d. OH^- and H₂I⁺         e. OH^- and I^-
Q.16:-. Which of the following properties would indicate an acid?
I. pH less than 7   II. Turns litmus paper to a blue color.
III. Turns phenolphthalein to a pink color.
a. I only    b. II only     c. I and II    d. I and III          e. II and III
 Q.17:- Which of the following reactions would indicate a base?
a. reacts with water to give H₃O⁺                       b. reacts with water to give H₂
c. reacts with a metal to give H₂                         d. reacts with HCO₃^- to give CO₂
e. reacts with NH₄⁺ to give NH₃
 Q.18:- An electron pair acceptor is:

a.   an acid.      b. a base.    

Q. 19:- Write down properties of  acids & bases. (back to  the page)    5

Q.20:- Write following reactions with one example.(back to the page)         

A.  Acid + Metal   B. Acid + Metal corbonate    C. Acid + Metallic  oxides  D.  Base + Non metallic oxides   E.  Acid + Base                                          5