Q: In which of the following colloids is the dispersing medium a liquid?
(a)Mist
(b)Foam
(c)Jelly
(d)Shaving cream
Loading...
CDS Chemistry Questions
12 previous year questions
Sub-topics
Colloids (1)Isotopes (1)Metals and Their Properties (1)Chemical Compounds and Uses (1)Gases and Their Properties (1)Chemical Compounds - Trade and Chemical Names (1)Glass and Its Properties (1)Atomic Structure (1)Chemical Processes (1)Classification of Matter (1)Periodic Table (1)Acids and Bases (1)
Q: The two isotopes of elemental chlorine are :
(a)³⁵₁₇Cl and ³⁶₁₇Cl
(b)³⁴₁₇Cl and ³⁶₁₈Cl
(c)³⁵₁₇Cl and ³⁷₁₈Cl
(d)³⁵₁₇Cl and ³⁷₁₇Cl
Q: Which one among the following metals is not stored under oil?
(a)Sodium
(b)Rubidium
(c)Potassium
(d)Lithium
Q: Potassium nitrate is not used :
(a)as a fertilizer
(b)in medicine
(c)in making gunpowder
(d)as a preservative of meat products
Q: Which one among the following statements for the gases mentioned below is not correct?
(a)Hydrogen has 3 isotopes.
(b)Helium is a commonly used gas in electric bulbs.
(c)Oxygen is used to burn fuel in rocket engines in spacecraft.
(d)Nitrogen can be used in gaseous form to replace air in food packaging.
Q: Match List-I with List-II and select the correct answer using the code given below the Lists : List-I (Trade Name) — List-II (Chemical Name) A. Bleaching powder — 1. Sodium bicarbonate B. Baking soda — 2. Sodium carbonate, 10 water C. Washing soda — 3. Calcium oxychloride D. Plaster of Paris — 4. Calcium sulphate, ½ water Code : (a) A-3, B-1, C-2, D-4 (b) A-3, B-2, C-1, D-4 (c) A-4, B-2, C-1, D-3 (d) A-4, B-1, C-2, D-3
(a)A-3, B-1, C-2, D-4
(b)A-3, B-2, C-1, D-4
(c)A-4, B-2, C-1, D-3
(d)A-4, B-1, C-2, D-3
Q: Which one among the following statements is not true for glass?
(a)Sodium silicate is known as water glass.
(b)Glass is also called super cooled liquid.
(c)Crystallinity develops on cooling of the molten mass of the glass.
(d)Coloured glasses can be made by adding different colouring materials.
Q: Which one among the following is responsible for determining the chemical properties of an element?
(a)Protons
(b)Electrons
(c)Neutrons
(d)Nucleus
Q: Which one among the following is used in bleaching of paper?
(a)Chloride
(b)Chlorobenzene
(c)Ammonium chloride
(d)Hydrochloric acid
Q: Which one among the following substances is a compound?
(a)Sugar
(b)Air
(c)Milk
(d)Tea
Q: What is the total number of naturally occurring elements?
(a)114
(b)94
(c)86
(d)82
Q: Which one of the following statements regarding acids is not correct?
(a)Hydrochloric acid is present in the gastric juice secreted by the stomach.
(b)Acetic acid is the main constituent of vinegar.
(c)Oxalic acid is found in tamarind paste.
(d)Lemon and orange juices contain citric acid and ascorbic acid respectively.
Other CDS Subjects
Indian Economy (303)Science & Technology (246)General Studies (160)Geography (133)Indian Polity (124)Modern History (58)Defence & Security (56)Quantitative Aptitude & Data Interpretation (41)Environment & Ecology (37)Current Affairs (37)Art & Culture (32)General Science (27)History (26)English Language (24)Ancient History (20)Medieval History (18)International Relations (17)Geology & Geophysics (9)Internal Security (7)Biology (5)Logical Reasoning & Mental Ability (4)Economy (4)Government Schemes & Current Affairs (3)Indian Polity & Governance (3)Science and Technology (3)Engineering Aptitude (2)Ethics & Aptitude (1)Disaster Management (1)Social Issues (1)Mathematics (1)Economics (1)