What is the work done by the force of gravity on a satellite moving round the earth? Justify your solution.
Answer: Work is said to be done when a force applied to an object moves that object. We can calculate work... View Article
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Give an example of characteristics being used to determine how close two species are in evolutionary terms.
Let us take the example of humans and apes. Both of them have similar body design. Body hair and mammary... View Article
Compare the traditional water harvesting system with portable system in hilly/mountains areas or plains or plateau regions.
Rainwater harvesting is the simple process or technology used to conserve Rainwater by collecting, storing, conveying and purifying Rainwater that... View Article
What are the components of the transport system in human beings? What are the functions of these components?
The transport system’s main components in human beings are the heart, blood, and blood vessels. Given below article gives a... View Article
Write the names according to International system of numeration: (a)78921092 (b)7452283 (c)99985102 (d)48049831
Answer: In the Indian numbering system, place values of digits in the number go in Ones, Tens, Hundreds, Thousands, Ten... View Article
Which one of the following is the correct electronic configuration of sodium? (a) 2, 8 (b) 8, 2, 1 (c) 2, 1, 8 (d) 2, 8, 1.
Answer: (d) 2, 8, 1 The correct electronic configuration of sodium is 2, 8, 1 (electronic configuration is the distribution of... View Article
Explain what is the definition of pH with the help of examples and equation that is used for calculating it.
pH is defined as the measure of hydrogen ion concentration used to measure the acidity or alkalinity of a given... View Article
A diver is able to cut through water in a swimming pool. Which property of matter does this observation show?
Given that a diver can cut through water in a swimming pool. This happens due to the special properties of... View Article
Which of the following leaves have reticulated venation? Wheat, tulsi, maize, grass, coriander (dhania), china rose.
The leaves of tulsi, coriander, and china rose have reticulate venation, whereas maize, grass, and wheat have parallel venation. Reticulate... View Article
Which of the following has the maximum number of moles? a) 7 gram of N2 b)2 grams of H2 c) 8 grams of O2 d) 20 gram of NO2
Answer: (b) 2 grams of H2 The number of moles is given by= Molecular weight (M)/ given Weight (W) Therefore, (a)... View Article
If the product of two whole number is 1, can we say that one or both of them will be 1? Justify through examples.
Given If the product of two whole number is 1, can we say that one or both of them will... View Article
Which of the following is a test for proteins? a) Biuret Test b) Iodine Test c) Emulsion test d) None of the above
Biuret Test is the test conducted to test proteins. A Biuret test is a chemical test used to determine a... View Article
Which of the following are completely absent in plants? a) Nerves b) Secondary Roots c) Axillary Bud d) Apical Drug
Nerves are absent in plants. Plants do not have a nervous system like animals but are known to respond to... View Article
Which of following acid is present in tamarind? a) Nitric acid b) Citric acid c) Tartaric acid d) Hydrochloric acid
Tartaric acid is present in tamarind. Tartaric acid It is also known as dihydroxybutanedioic acid, is a dicarboxylic acid, one of the... View Article
Which of the following compounds is not an antacid? a) Cimetidine b) Ranitidine c) Aluminium hydroxide d) Phenelzine
Phenelzine is an anti-depressant, and the remaining are antacids. What are antacids? Antacids neutralise the acid made by your stomach.... View Article
Which of the following compounds is not coloured yellow? a) Zn2[Fe(CN)6] b) BaCrO4 c) K3[Co(NO2)6] d. (NH4)3[As(Mo3O10)4]
Zn2[Fe(CN)6] is not a yellow coloured compound. Colour of coordination complexes The colour of a coordination complex can be predicted... View Article
Which one of the following is a weak acid? a) Perchloric acid b) Hydrochloric acid c) Nitric acid d) Hydrogen Fluoride
Hydrogen Fluoride or HF is a weaker acid as compared to other given acids. Strong acids and weak acids Strong... View Article
Which of the following is a strong base? a) Acetic acid b) Hydrochloric acid c) Sodium bicarbonate d) Sodium hydroxide
Sodium hydroxide is a strong base. Explanation: Strong bases dissociate completely in an aqueous solution. Sodium hydroxide is a strong... View Article
Which of the following is a polar molecule? (a) Ammonia (NH3) (b) Methane (CH4) (c) Ethylene (C2H4) (d) Carbon Tetrachloride (CCl4)
Answer: (a) Ammonia (NH3) Ammonia is a polar covalent molecule. Polar covalent bonds are formed when the shared pair of... View Article
Which one of the following is a strong electrolyte? a) Sulphuric Acid b) Acetic Acid c) Carbonic Acid d) Phosphoric Acid
Sulphuric acid is a stronger electrolyte among the following. What are strong electrolyte and weak electrolyte? Electrolytes are substances that, when... View Article
