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 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 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 I. Multiple Choice Questions (1 mark each) Question 1. [Analytical Chemistry] Ravi was asked to identify the cation present in the salt solution. He added one of the reagents given below and got a reddish-brown precipitate. The reagent that he used is: (a) Silver nitrate solution(b) … Read more
ICSE Class 10 Biology Competency Focused Practice Questions Solution: Long Answer Questions (3 marks each) Question 53Rohit’s father has increased thirst and hunger with frequent urination. He also gets fatigued very often. His doctor advised him to get a blood sugar profile test done. (a) Name the disease based on the symptoms given above. (b) … Read more
ICSE Class 10 Biology Competency Focused Practice Questions Solution: Short Answer Questions (2 marks each) Question 31Haemorrhage frequently happens in viral dengue fever. Compare this condition with haemophilia. Answer: In Dengue fever, the platelet count drops sharply. This leads to coagulation of blood slowly, which can lead to haemorrhage. On other hand, haemophilia is a … Read more