set 2 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 2 EXERCISES
The following question based on inorganic chemistry topic of general science mcq
(a) Carbon
(b) Nickel
(c) Nitrogen
(d) Zinc
The correct answers to the above question in:
Answer: (a)
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Question : 1
Match List-I with List-II :
List-I | List-II |
A. Element with the largest size in the second period | 1. boron |
B. Element with the smallest size in group 13 | 2. fluorine |
C. Element with a maximum non-metallic character | 3. bromine |
D. Element with the smallest size in the fourth period | 4. lithium |
E. Element with the most metallic character in group 14 | 5. lead |
a) A – (4); B – (2); C – (1); D – (3); E – (5)
b) A – (1); B – (4); C – (2); D – (3); E – (5)
c) A – (4); B – (1); C – (2); D – (5); E – (3)
d) A – (4); B – (1); C – (2); D – (3); E – (5)
Answer »Answer: (d)
Question : 2
Which of the following statements about pH and $H^+$ ion concentration are incorrect?
- The addition of one drop of concentrated HCl in NH4OH solution decreases the pH of the solution.
- A solution of the mixture of one equivalent of each of CH3COOH and NaOH has a pH of 7.
- The pH of pure neutral water is not zero.
- A cold and concentrated H2SO4 has a lower $H^+$ ion concentration than a dilute solution of $H_2SO_4$.
a) 1, 2 and 4
b) 1, 3 and 4
c) 1, 2 and 3
d) 2, 3 and 4
Answer »Answer: (a)
CH3COOH is weak acid while NaOH is a strong base, so one equivalent of NaOH can not be neutralized with one equivalent of CH3COOH.
Concentrated H2SO4 has a higher H+ ion concentration than dilute solution of H2SO4.
Question : 3
Which is the most abundant element after oxygen?
a) Silicon
b) Sodium
c) Carbon
d) Chlorine
Answer »Answer: (a)
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