Friday, August 22, 2014

CBSE Class 10 - Science - CH2 - Acids, Bases and Salts (MCQs)

Acids, Bases and Salts

credits:clker.com
MCQs

Q1: The most commonly used indicator in laboratory is
(a) Methyl Orange
(b) Litmus
(c) Phenolphtalein
(d) Universal Indicator




Q2: Which gas is released when a metal reacts with an acid?

(a) Cl2
(b) O2
(c) H2
(d) SO2


Q3: The strength of acid depends upon

(a) density of the acid
(b) oxygen atoms present
(c) number of hydrogen atoms present in the molecule
(d) concentration of H+ ions furnished by the acid


Q4: Which statement is incorrect?

(a) Acids have pH more than 7
(b) Acids give H+ ions in water
(c) Acid conduct electricity in aqueous solution
(d) Acids turn blue litmus red.


Q5: Which of the following substance is antacid?
(a) NaCl
(b) Mg(OH)2
(c) HCl
(d) H2SO4


Q6: Which of the following is strong acid?

(a) Acetic acid
(b) Nitric acid
(c) Citric acid
(d) Oxalic acid


Q7: Who proposed ionic theory of acid and bases

(a) Arrhenius
(b) Bronsted
(c) Lewis
(d) Lowry


Q8:  Acid present in bee sting?

(a) Methanoic acid 
(b) Hydrochloric acid 
(c) Acetic acid 
(d) Sulphuric acid


Q9: HCl reacts with NaOH to form salt and water, this reaction is called 

(a) Precipitation reaction 
(b) Neutralization 
(c) Redox reaction 
(d) Combination reaction


Q10: Which of the following solutions is the most basic?

(a) pH = 8.2
(b) pH = 9.3
(c) pH = 11.2
(d) pH = 10.5



Answers:
1: (d) Universal Indicator
2: (c) H2
3: (d) concentration of H+ ions furnished by the acid
4: (a) Acids have pH more than 7
5: (b) Mg(OH)2
6: (b) Nitric acid
7: (a) Arrhenius
8: (a) Methanoic acid (also called Formic acid)
9: (b) Neutralization
10: (c) pH = 11.2

2 comments: