set 2 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 4 EXERCISES
The following question based on classification of elements, chemical bonding, periodicity in properties & physical transformation topic of general science mcq
- Maximum covalency of carbon is 4, whereas maximum covalency of silicon is 6.
- The maximum covalency of an element is limited to 6.
(a) 2 only
(b) Both 1 and 2
(c) 1 only
(d) Neither 1 nor 2
The correct answers to the above question in:
Answer: (c)
Practice classification of elements, chemical bonding, periodicity in properties & physical transformation (set 2) Online Quiz
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Question : 1
Mendeleev classified elements in
a) eight periods and eight groups
b) seven periods and eight groups
c) increasing order of atomic groups
d) eight periods and seven groups
Answer »Answer: (b)
Mendeleev’s periodic table consists of seven periods and eight groups.
Question : 2
Which of the following statement is not true?
a) Addition of solute to a solution increases its water potential
b) Water vapour pressure of any solution is lower than vapour pressure of pure water
c) Boiling point of any water solution is higher than pure water
d) When a solution is separated with the help of semipermeable membrane, then water flow can be stopped by giving pressure to the solution
Answer »Answer: (a)
Question : 3
Newlands could classify elements only upto
a) chlorine
b) calcium
c) copper
d) chromium
Answer »Answer: (b)
Question : 4
Match List-I with List-II:
List-I | List-II |
A. Electrolysis | 1. Resistant to corrosion |
B. Anodization | 2. Laws of electrolysis |
C. Electrochemical cell | 3. Recharging of battery |
D. Faraday | 4. Chemical energy into electrical energy |
a) A – (1), B – (3), C – (4), D – (2)
b) A – (3), B – (1), C – (2), D – (4)
c) A – (3), B – (4), C – (1), D – (2)
d) A – (3), B – (1), C – (4), D – (2)
Answer »Answer: (d)
Question : 5
Which one of the following is not a periodic property i.e., does not show any trend on moving from one side to the other in the periodic table?
a) Valency
b) Radioactivity
c) Atomic size
d) Electronegativity
Answer »Answer: (b)
Question : 6
Which of these choices is not a family of elements?
a) Metals
b) Inert gases
c) Halogens
d) All of these
Answer »Answer: (a)
A family of elements consists of elements present in a group of the periodic table.
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