1 A mixture in which the particles are large enough to be seen with the naked eye and settle down on standing is called: A Solution B Colloid C Suspension D Alloy
2 The solubility of a gas in a liquid generally ______ with increase in temperature. A increases B decreases C remains constant D first increases then decreases
3 The branch of chemistry that deals with the study of radioactive substances is: A Polymer chemistry B Nuclear chemistry C Geochemistry D Biochemistry
4 Allotropy is the existence of an element in: A Only one form B Two or more different physical forms C Only gaseous state D Only liquid state
6 The branch of chemistry that deals with the study of the composition and structure of materials is: A Physical chemistry B Analytical chemistry C Organic chemistry D Inorganic chemistry
7 Which of the following shows the Tyndall effect? A Salt solution B Sugar solution C Colloidal solution D Pure water
9 The process in which a solid changes directly into a gas without passing through the liquid state is called: A Evaporation B Sublimation C Condensation D Melting
10 Which of the following is an example of a chemical change? A Dissolving sugar in water B Boiling of water C Rusting of iron D Breaking of glass
11 Which of the following is NOT a branch of chemistry? A Biochemistry B Geochemistry C Astronomy D Polymer chemistry
12 The scattering of light by colloidal particles is known as: A Brownian movement B Tyndall effect C Diffusion D Osmosis
13 Which effect is shown by colloidal solutions when a beam of light passes through them? A Tyndall effect B Brownian effect C Doppler effect D Photoelectric effect
14 Which branch of chemistry deals with the study of carbon compounds? A Inorganic chemistry B Organic chemistry C Physical chemistry D Analytical chemistry
15 Which of the following is an example of a homogeneous mixture? A Oil and water B Sand and iron filings C Salt solution D Muddy water
16 The process in which a solid changes directly into a gas without becoming a liquid is called: A Evaporation B Sublimation C Condensation D Melting
17 Which state of matter consists of ionized gas with free electrons? A Solid B Liquid C Gas D Plasma
19 When a gas changes into a liquid, the process is called: A Melting B Freezing C Condensation D Sublimation
20 The solubility of most gases in water with increase in temperature: A Increases B Decreases C Remains same D First increases then decreases
21 The solubility of most solids in water ______ with an increase in temperature. A decreases B increases C remains the same D becomes zero
22 What is the approximate particle size range in a colloidal solution? A Less than 1 nm B 1 nm to 1000 nm C More than 1000 nm D More than 1 mm
23 Which of the following is an example of a physical change? A Burning of wood B Melting of ice C Rusting of iron D Digestion of food
24 Which of the following is an example of a colloid? A Salt solution B Milk C Sand in water D Sugar solution
25 Which method is suitable for separating a mixture of two miscible liquids with different boiling points? A Filtration B Sublimation C Fractional distillation D Magnetic separation