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Practice MCQ Questions and answers on Chemistry-GK

Learn and practice General Knowledge questions and answers on Chemistry with very easy and understandable explanations. GK questions are very helpful different type of competitive exams. Page-9 section-5

Each section contains 100 MCQs on Chemistry .
81
Which of these acids is not organic in origin?
Discuss
Answer & Solution
Answer: Option B
Solution:
Sulphuric acid is produced from sulfur, oxygen and water via the conventional contact process (DCDA) or the wet sulfuric acid process (WSA). Sulfuric acid can be produced in the laboratory by burning sulfur in air and dissolving the gas produced in a hydrogen peroxide solution.
82
Match the sourc in Column B with the product of
Column A. (Product) Column B (Source)
A. Formic acid1. Lemon
B. Citric acid 2. Tamarind
C. Tartaric acid3. Ants
Discuss
Answer & Solution
Answer: Option B
No explanation is given for this question. Let's Discuss on Board
83
Saline soil contains
Discuss
Answer & Solution
Answer: Option A
Solution:
Saline soil contains high concentration of salt.
84
Sour milk contains
Discuss
Answer & Solution
Answer: Option D
Solution:
Sour milk contains Lactic acid.
85
Basicity of boric acid, H3BO3 is
Discuss
Answer & Solution
Answer: Option B
Solution:
Boric acid, H3BO3, has three replaceable hydroxyl groups. When it reacts with a base, it can donate three protons (H+) to form borate ions. Therefore, its basicity is 3.
86
Which one is a soluble salt in H2O?
Discuss
Answer & Solution
Answer: Option C
Solution:
CaCl2 is a soluble salt in H2O.
87
Vinegar is ________ .
Discuss
Answer & Solution
Answer: Option A
Solution:
Vinegar is a common household item used in cooking and cleaning.
It's actually a dilute solution of acetic acid in water.
Acetic acid gives vinegar its sour taste and pungent smell.
Glacial acetic acid is pure (100%) acetic acid, which is a very strong acid and not used in cooking.
Formic acid is a different type of acid entirely, and it’s not what makes up vinegar.
Therefore, the correct answer is that vinegar is a diluted acetic acid.
88
pH value between 6.5-7.5 makes the soil
Discuss
Answer & Solution
Answer: Option B
Solution:
pH value between 6.5-7.5 makes the soil neutral.
89
A pungent smell often present near the urinals is due to
Discuss
Answer & Solution
Answer: Option C
Solution:
A pungent smell often present near the urinals is due to ammonia.
90
Ammonial is a mixture of
Discuss
Answer & Solution
Answer: Option A
Solution:
Ammonial is an explosive made up of ammonium nitrate and aluminium powder. The ammonium nitrate functions as an oxidizer and the aluminium as fuel. The use of the relatively cheap ammonium nitrate and aluminium makes it a replacement for pure TNT. The mixture is affected by humidity because ammonium nitrate is highly hygroscopic. Ammonal is not easily detonated, requiring a fairly substantial shock, though it is still more sensitive than trinitrotoluene and composition C4 . The detonation velocity of ammonal is approximately 4,400 metres per second or 9,842 miles per hour. Ammonal used for military mining purposes was generally contained within metal cans or rubberised bags to prevent moisture ingress problems. The composition of ammonal used at Messines was 65% ammonium nitrate, 17% aluminum, 15% trinitrotoluene (TNT) and 3% charcoal. Ammonal remains in use as an industrial explosive. Typically, it is used for quarrying or mining purposes.