Chemistry set 1 MCQs

Practice interactive objective questions for this topic. Select an option to instantly verify your answer and read detailed explanations.

Showing 504 questions
Q.61 Which substance is commonly added to tap water to make it safe for drinking by killing harmful microorganisms?
A Fluoride
B Calcium
C Iron
D Chlorine
Discuss / Board
Q.62 What is the primary acid found in citrus fruits like oranges and lemons?
A Citric acid
B Tartaric acid
C Acetic acid
D Lactic acid
Discuss / Board
Q.63 Which of the following is the common name for the reaction of an acid with a base?
A Precipitation
B Neutralisation
C Maillard reaction
D Caramelisation
Discuss / Board
Q.64 Quicklime (CaO) is often added to soils that are ____ to increase fertility.
A neutral soils
B strongly acidic soils
C alkaline soils
D slightly acidic soils
Discuss / Board
Q.65 Which of the following statements about nutrients are correct? Statement A: C, H, O, N, P and K are macro nutrients. Statement B: Fe, Mn, Ni, Co and Mo are micronutrients. Statement C: Micronutrients are not essential for our body.
A All statements A, B and C
B Only statements A and C
C Only statements B and C
D Only statements A and B
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Q.66 The property of rock or soil that indicates the ability of allowing fluids to flow through it is called:
A Plasticity
B Density
C Permeability
D Stability
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Q.67 Which of the following halogen elements are liquid and gas respectively at room temperature?
A Iodine and Fluorine
B Bromine and Chlorine
C Astatine and Iodine
D Bromine and Fluorine
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Q.68 What is the chemical formula for potassium permanganate?
A K2MnO4
B KMnO2
C K2MnO2
D KMnO4
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Q.69 What is denatured alcohol?
A Ethanol mixed with little methanol
B Pure Ethanol
C Propanol
D Pure Methanol
Discuss / Board
Q.70 The elements in Group 17 of the periodic table are known as:
A noble gases
B alkali metals
C transition metals
D halogens
Discuss / Board
Q.71 What is the chemical formula for sodium bicarbonate?
A Na2CO3
B NaOH
C NaCl
D NaHCO3
Discuss / Board
Q.72 Which element is located in Group 18 of the periodic table and is known for its lack of chemical reactivity?
A Chlorine
B Fluorine
C Helium
D Oxygen
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Q.73 Metals are often described as having which two physical properties?
A Malleability and sonorous
B Ductility and lustre
C Malleability and lustre
D Lustre and sonorous
Discuss / Board
Q.74 What is the theoretical state where the particles of a substance have minimum motion?
A freezing point of water
B zero-point energy
C standard temperature
D absolute zero temperature
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Q.75 Select the imbalanced chemical equation from the following.
A 10KClO3 +3P4 → 3P4O10 +10KCl
B 3CaCl2 + 2Na3PO4 → Ca3(PO4)2 + 6NaCl
C 6HClO4 +P4O10 → 4H3PO4 +6Cl2O7
D 3Hg(OH)2 +2H3PO4 → Hg3(PO4)2 +6H2O
Discuss / Board
Q.76 Select the INCORRECT statement regarding Ozone.
A Ozone is a deadly poison
B Ozone(O_3),like oxygen,is a life supporting gas
C Ultraviolet radiation causes skin cancer
D Ozone is formed from oxygen in the presence of ultraviolet radiation.
Discuss / Board
Q.77 What is the chemical formula for the compound commonly known as 'laughing gas'?
A NO
B N2O3
C N2O
D NO2
Discuss / Board
Q.78 What is the primary gas responsible for the leavening effect in bread when yeast ferments sugars?
A Carbon dioxide
B Oxygen
C Nitrogen
D Helium
Discuss / Board
Q.79 Below are two chemical equations: Zn(s) +CuSO4(aq) →ZnSO4(aq)+Cu(s) Pb(s) +CuCl2(aq) → PbCl2(aq)+ Cu(s) Why does copper get separated from its compound form in both the cases?
A Zinc and Lead are unstable in element form.
B Zinc and Lead are more reactive than Copper.
C Copper compounds break down under high pressure.
D Copper is more reactive than Zinc and Lead.
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Q.80 JJ Thomson is known for developing which model in 1898?
A Plum pudding model
B Double-slit model
C Gold foil model
D Oil drop model
Discuss / Board
Q.81 Which chemical compound is commonly utilised as a preservative in beverages and food products to maintain freshness?
A Carboxylic acid
B Carbolic acid
C Benzoic acid
D Carbamic acid
Discuss / Board
Q.82 Select the INCORRECT statement from the following.
A Evaporation is a surface phenomenon.
B Both boiling and evaporation are bulk phenomena.
C Boiling is a bulk phenomenon.
D Evaporation causes cooling.
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Q.83 How does salt contribute to the preservation of food?
A By acting as an antioxidant.
B By inhibiting the growth of microorganisms through osmosis.
C By reducing the pH of the food.
D By promoting the Maillard reaction.
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Q.84 Suspended solids in water can increase the haziness of the water. Which of the following represents the measurement of haziness of water?
A Solubility
B Turbidity
C Salinity
D Viscosity
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Q.85 At what temperature are the numerical values on the Celsius and Fahrenheit scales identical?
A 32 degrees
B -32 degrees
C 40 degrees
D -40 degrees
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Q.86 Which gas is released when you combine vinegar and baking soda in a balloon, causing it to inflate?
A Carbon dioxide
B Oxygen
C Nitrogen
D Hydrogen
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Q.87 Select the correct order of the following metals in terms of their increasing reactivities.
A K,Cu,Mg and Au
B Au, Mg,Cu and K
C K,Mg,Cu and Au
D Au,Cu,Mg and K
Discuss / Board
Q.88 In the context of water pollution, what does a high Biological Oxygen Demand (BOD) usually indicate?
A The random changes in pH values
B Increasing amount of carbon dioxide
C Changes in turbidity
D The water is heavily polluted with organic matter
Discuss / Board
Q.89 Select the correct order of processes used for water purification in waterworks. 1. Filtration 2. Chlorination 3. Suspended impurity sedimentation 4. Solid impurity sedimentation
A 2-1-4-3
B 1-2-3-4
C 4-3-2-1
D 4-3-1-2
Discuss / Board
Q.90 Ortho-sulphobenzimide is one of the artificial sweeteners. It is also known as .
A Aspartame
B Sucralose
C Saccharin
D Alitame
Discuss / Board

Master Chemistry set 1 for All Competitive Exams 2026

Practicing Chemistry set 1 MCQs is one of the most effective ways to prepare for competitive examinations in 2026. This topic-wise question bank contains carefully selected multiple-choice questions designed to strengthen conceptual understanding, improve accuracy, and enhance problem-solving speed. Our collection includes beginner, intermediate, and advanced-level questions frequently asked in JKSSB, SSC, Banking, Railway, Police, Defence, State PSC, and various national-level examinations. Every question is structured to reflect real exam patterns and helps candidates become familiar with objective-type assessment formats. Instant answer verification enables students to identify mistakes immediately and learn the correct approach without wasting valuable preparation time. Regular practice of topic-wise MCQs improves retention, reinforces key concepts, and develops confidence required to perform well under exam pressure. Whether you are revising important concepts, preparing for an upcoming recruitment test, or strengthening weak areas, these practice questions provide a reliable platform for continuous improvement. Consistent participation in MCQ-based learning sessions can significantly increase your chances of achieving higher scores and better ranks in competitive examinations.

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