set 3 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 4 EXERCISES
The following question based on acids, bases, salts and metals topic of general science mcq
(a) it has a universal appearance
(b) it can be used for entire pH range
(c) it is available universally
(d) all the above are correct
The correct answers to the above question in:
Answer: (b)
It can be for entire pH range.
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Question : 1
Match Column-I with Column-II:
Column-I | Column-II |
A. Titanium | P. Coinage metal |
B. Palladium | Q. Fuel |
C. Uranium | R. Catalyst |
D. Platinum | S. Strategic metal |
a) A – R; B – S; C – Q; D – P
b) A – S; B – R; C – Q; D – P
c) A – P; B – R; C – Q; D – S
d) A – S; B – Q; C – R; D – P
Answer »Answer: (b)
Question : 2
The reaction of metal with acid results in the formation of–
a) only salt
b) both salt and hydrogen gas
c) only hydrogen gas
d) none of these
Answer »Answer: (b)
e.g. Na + HCl ⟶ NaCl + $1/2H_2$
Question : 3
Which of the following pairs of substances are chemically same?
a) Dead burnt plaster and gypsum
b) Both the above
c) Lime water and milk of lime
d) None of the above
Answer »Answer: (c)
Question : 4
Neutral water with pH about 7 becomes slightly acidic when aerated. This is because
a) ultraviolet radiation dissociates water molecules and makes water acidic
b) oxygen from air is dissolved in the water which makes the water acidic
c) dirt, which get contaminated with the water during aeration makes the water acidic
d) carbon-dioxide from air is dissolved
Answer »Answer: (d)
Question : 5
Acids are ____________ in taste while bases are ____________ in taste.
a) sweet, sour
b) sour, salty
c) sweet, salty
d) sour, bitter
Answer »Answer: (d)
All acids are sour in taste, like tartaric acid in tamarind and acetic acid in vinegar while all bases are bitter in taste like baking soda.
Question : 6
Arrange the following bases in increasing order of their, basic strength
- Sodium hydroxide
- Magnesium hydroxide.
- Aluminium hydroxide
- Ammonium hydroxide
a) 4 3 2 1
b) 4 2 1 3
c) 4 1 2 3
d) 1 2 3 4
Answer »Answer: (a)
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