ICSE 10 Physics Competency Based Questions Solution II. Very Short Answer Questions Question 36. [Force, Work, Power and Energy]Anu and Amy purchased ice creams in plastic balls and cones, respectively, during their outing at the science fair. After consuming their ice creams, Anu stated that regardless of whether they were filled with ice cream or … Read more
ICSE Physics Competency Based Questions Solution: I. Multiple Choice Questions Question 1. [Light]When light enters from air to glass, it bends toward the normal. If red, blue, and yellow colours are allowed to enter the same glass block at the same angle of incidence, then for which colour, the value of ∠𝑖 − ∠𝑟, be … Read more
ICSE 10 Chemistry Competency Focused Practice Questions Solution: IX. Long Answer Questions Question 108. [Metallurgy]With respect to the Hall Heroult process related to the extraction of aluminium, justifythe following:(a) Powdered Coke is sprinkled over the electrolytic mixture undergoing electrolyticreduction.(b) Graphite anodes are continuously replaced during the electrolysis.(c) Cryolite and fluorspar must be added to the … Read more
ICSE 10 Chemistry Competency Focused Practice Questions Solution VIII. Short Answer Questions Question 91. [Study of Acids, Bases and Salts]Some general rules for the solubility of salts in water are listed. Answer: (c) silver nitrate and zinc chlorideSilver chloride is formed, which is an insoluble precipitate, while for all others, noprecipitate is formed 2AgNo3 + … Read more
ICSE Chemistry Competency Focused Practice Questions Solution- VII. Very Short Answer Questions Question 84. [Analytical Chemistry]Calcium hydroxide solution is used to detect the presence of carbon dioxide gas, whilesodium hydroxide is NOT. Justify. Answer: Carbon dioxide gas reacts with calcium hydroxide to form a white precipitate of calcium carbonate. In reaction with sodium hydroxide, the … Read more
ICSE Class 10 Chemistry Competency Focused Practice Questions Solution VI. IUPAC Names Question 77. [Organic Chemistry] Give the IUPAC name of the following organic compounds: Answer: 2- methyl but-1-ene Question 78. [Organic Chemistry] Answer: 3- bromo butanoic acid Question 79. [Organic Chemistry] Answer: 2- methyl propan-2- ol Question 80. [Organic Chemistry] Answer: 2- methyl propanol … Read more
ICSE Class 10 Chemistry Competency Focused Practice Questions Solution: V. Structural diagram: (1 Mark each) Question 69. [Organic Chemistry]Draw the structural diagram of the product obtained when ethene reacts with chlorine. Answer: Explanation: When ethene reacts with chlorine, the product formed is 1,2-dichloro ethane. CH2 = CH2 + Cl2 → ClCH2 – CH2Cl Question 70. … Read more
ICSE Class 10 Chemistry Competency Focused Practice Questions Solution IV. One Word Answer: (1 Mark each) Question 59. [Analytical Chemistry] Name a positive non-metallic radical which is basic in nature. Answer: Ammonium (NH4+) Explanation: In ammonia the two electrons remaining on the nitrogen atom form a bond with the hydrogen ion. This bond that is … Read more
ICSE Class 10 Chemistry Competency Focused Practice Questions Solution III. Match the Following Question 50. [Periodic Properties and Variations of Properties] Column A Column B (a) Alkali metals (i) Be, C, O, F (b) Alkaline earth metals (ii) F, Cl, Br, I (c) Atomic radius decreases (iii) P, Al, Na, S (d) Non-metallic character decreases … Read more
ICSE Class 10 Chemistry Competency Focused Practice Questions Solution II. Fill in the Blanks (1 mark each) Question 39. [Mole Concept and Stoichiometry]Fill in the blanks by choosing the correct options given in the brackets: An aqueous solution of gas X turns red litmus blue, so it must contain (i)_______________(hydrogen/ hydroxyl) ions. When this solution … Read more