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Spirogyra is called pond silk because (1) Filaments are made up of silk (2) Filaments are slippery to touch (3) It looks like thread (4) All of the above

Answer: (2) Filaments are slippery to touch Spirogyra is free-floating green algae present in freshwater habitats such as ponds, lakes, etc.... View Article

Why do we store Silver chloride in dark coloured bottles?

Answer: Silver chloride is an example of a light-sensitive chemical compound and the reaction is an example of a photolytic decomposition... View Article

Which one of the following statement is correct? (1) If x⁶ + 1 is divided by x + 1 reminder is -2. (2) If x⁶ + 1 is divided by x – 1 reminder is 2. (3) If x⁶ + 1 is divided by x + 1 reminder is 1. (4) If x⁶ + 1 is divided by x – 1 reminder is -1.

Answer: (2) If x6 + 1 is divided by x - 1 reminder is 2 To understand the true statement each condition has to be considered Let us consider... View Article

Boiling point of petrol in degree celsius is (1) Below 20 (2) 170 – 120 (3) 35 – 70 (4) 270 – 340

Answer: (3) Petroleum is a fossil fuel that naturally occurs in the liquid form created by the decomposition of organic matter beneath the... View Article

What is the systematic position of funaria?

Answer: Funaria is a Moss genus. The plant is a part of the Funariaceae family. The order is Funariales, and Bryopsida is class. The Bryophyta... View Article

Pebrine disease of silkworms is caused by (1) Nosema (2) Plasmodium (3) Dugesia (4) Monocystis

Answer: (1) Pebrine, is a dangerous disease to in silkworms and the causative organism is Nosema bombycis, a protozoan. This silkworm disease is... View Article

What is the chemical formula of zeolite?

Answer: Zeolites are microporous, three dimensional crystalline solid of aluminium silicate. The chemical formula of zeolites is... View Article

Write two examples of plants with prop roots.

Answer: The root is an underground part of the plant that absorbs water and minerals from the soil and anchors the plant firmly. In some plants,... View Article

How can you verify the Faraday’s First Law Of Electrolysis experimentally?

Answer: Faraday’s – First Law of Electrolysis It states, during electrolysis, the amount of chemical reaction which occurs at any... View Article

List the three events that occur during the process of photosynthesis. Explain the role of stomata in this process

Answer: Photosynthesis is a process by which phototrophs convert light energy into chemical energy, which is later is used to fuel cellular... View Article

Factorise:a^3 – b^3 – C^3 – 3abc

Answer: We know that a3 + b3+ c3− 3abc = (a + b + c)(a2 + b2+ c2− ab − bc − ca)...........................(1) By using... View Article

(1) Differentiate between microsporogenesis and megasporogenesis. (2) Which type of cell division occurs during these events? (3) Name the structures formed at the end of these two events.

Answer: (1) The difference between microsporogenesis and megasporogenesis is listed below. Microsporogenesis Megasporogenesis... View Article

Phenols do not respond to which of these tests? (1) Ferric chloride test (2) Litmus test (3) Bromine test (4) Nessler’s reagent test

Answer: (4) The reagent of Nessler is a mercury(II) iodide (HgI2) solution in potassium iodide and potassium hydroxide, named after the German... View Article

Choose the correct answer among the following: (1) Gastric juice contains (i) pepsin, lipase, and rennin (ii) trypsin, lipase, and rennin (iii) trypsin, pepsin, and lipase (iv) trypsin, pepsin, and renin (2) Succus entericus is the name given to (i) a junction between the ileum and large intestine (ii) intestinal juice (iii) swelling in the neck (iv) appendix

(1) Answer: (i) Gastric juice has pepsin, lipase, and rennin in it. Pepsin is secreted as pepsinogen in an inert form which is activated by... View Article

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