Science

Question: Mention one reason why tungsten is used for making filament of electric lamp. Answer: It has low resistivity and high melting point. Question: Calculate the number of electrons constituting one coulomb of change. (Charge one electron = 1.6 × 10-19C) Answer: Number of electron = 1C/1.6 × 10-19C = 0.625 × 1019 = 6.25 × 10-18 …

Question: What is Hydrotropism? Answer: Hydrotropism is a type of tropism, where the plant shows movement in response to water. Question: What is coordination? Answer: The organ system cannot work independently. They are linked in one way or the other. Working together of all these systems is called coordination. Question: …

NCERT 10th Class (CBSE) Science: Life Process Quiz 35 Multiple Choice Questions related to NCERT 10th Class (CBSE) Science (Biology) Life Processes Quiz The feeding of complex organic matter by ingesting, which is subsequently digested and absorbed is called holozoic nutrition e.g., Amoeba, frog, human beings etc. It is because …

Question: Name the components of blood which transport: Food, carbon dioxide and nitrogenous wastes Oxygen Answer: (1) Plasma, (2) Hemoglobin Question: When we breathe out, why does the air passage not collapse? Answer: Because it is supported by cartilaginous rings which prevent its collapsing. Question: Name the process of loss …

NCERT 10th Class (CBSE) Science: Work, Life and Leisure Quiz 20 Multiple Choice Questions related to NCERT 10th Class (CBSE) Science (Chemistry) Metals and Non-metals Quiz Elements can be classified as metals and non-metals. Metals are lustrous, malleable, ductile and are good conductors of heat and electricity. They are solids …

NCERT 10th Class (CBSE) Science: Chemical Reaction & Equations Quiz 34 Multiple Choice Questions related to NCERT 10th Class (CBSE) Science (Chemistry) Chemical Reaction & Equations Quiz In a physical change, no new substance is formed while in a chemical change, a new substance is formed. It should be cleaned …

NCERT 10th Class (CBSE) Science: Acids, Bases and Salts Quiz 37 Multiple Choice Questions related to NCERT 10th Class (CBSE) Science (Chemistry) Acids, Bases and Salts Quiz p in pH stands for ‘potenz’ in Germany and H is for hydrogen. When milk changes to curd, it becomes acidic due to …

Question: What is meant by p and pH? Answer: p in pH stands for ‘potenz’ in Germany and H is for hydrogen. Question: What are antacids? Explain their role in providing relief from stomach ache. Answer: Antacids are mild base. Antacids neutralise the effect of extra acid produced in the …

Question: Give composition of the alloy – ‘brass’ and ‘bronze’. Answer: Brass – Cu and Zn Bronze – Cu and Tin Question: What is the formula of rust? Answer: Fe2O3.xH2O. Question: An alloy has low melting point and is, therefore, used for electrical fuse. Name they alloy and write its …

Chemical Reaction & Equations: 10 Science – Chapter 1 Question: What is a balanced chemical equation? Why should chemical equations be balanced? Answer: An equation for a chemical reaction is an equation in which the number of atoms for each element in the reaction and the total charge is the same …