State Ostwald’s dilution law.
Answer: Ostwald’s dilution law describes the dissociation constant of the weak electrolyte with the degree of dissociation (α) and the... View Article
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What is the full form of PCRA?
Answer: PCRA – Petroleum Conservation Research Association PCRA is a national government agency dedicated to promoting petroleum product conservation &... View Article
Calculate the molar mass of sulfur?
Answer: The molar mass is defined as the mass of 1 mole of the given substance. To calculate the molar... View Article
What is succus entericus?
Answer: Succus entericus also called intestinal juice is a fluid secreted in the small intestine in small quantities. Succus entericus... View Article
What is the structure of XeOF 4?
Answer: The xenon oxytetrafluoride would have a total of 42 valence electrons 8 valence electrons from the xenon atom 6... View Article
How many structure isomers can you draw for pentane? (1) 2 (2) 4 (3) 3 (4) 6
Answer: (3) 3 Pentane (C5H12) is an organic compound with five carbon atoms. Pentane has three structural isomers that are... View Article
Find the number of ways in which 5 boys and 5 girls may be seated in a row so that no two girls and no two boys are together.
Answer: Number of boys = 5 Number of girls = 5 Number of boys can be seated in the row... View Article
List the biodegradable and non-biodegradable waste products in your school. What are the best ways to get rid of this garbage?
Answer: The following are the list of biodegradable and non-biodegradable waste products found at a school: Biodegradable waste Non-biodegradable waste... View Article
What is the full form of chemical fertilizer N.P.K?
Answer: N.P.K stands for ‘Nitrogen, phosphorus and potassium’. the three nutrients which make up all fertilizers. The fertilizer definition can... View Article
Which animal is called the ship of the desert(1) Yak(2) Horse(3) Deer(4) camel
Answer: (4) Camels are called a ship of the desert because of their ability to survive in the desert climate... View Article
Select the group of plants that possess stilt roots.(1) Pandanus odoratissimus, Ficus benghalensis(2) Rhizophora mangal, Hedera helix(3) Zea mays, Rhizophora mangal.(4) Ficus benghalensis, Pisum sativum
Answer: (3) Stilt roots are adventitious aerial roots that grow obliquely downward from the main stem’s basal nodes and attach... View Article
Fuse wire is made up of an alloy of
Answer: Tin and lead alloy An electrical fuse is a safety device in the circuit that protects electrical systems by... View Article
What is back cross?
Answer: Backcrossing is a crossing of a hybrid with one of its parents, or an adult genetically identical to the... View Article
Which is the smallest whole number?
Answer: 0 A collection of numbers that includes all positive integers and 0 is known as a whole number. Whole... View Article
Detritus food chain begins with (1) Bacteria(2) Viruses(3) Algae(4) Protozoa
Answer: (1) Detritus food chain in the form of chain wherein the dead organic matter named detritus is used to... View Article
Why are bryophytes called amphibians of plant kingdom?
Answer: Bryophytes are non-vascular plants, without xylem and phloem. They reproduce by gamete formation. For eg., mosses, liverworts and hornworts.... View Article
What is the focal length of a convex lens of focal length 30 cm in contact with a concave lens of focal length 20cm? Is the system a converging or a diverging lens? Ignore the thickness of the lenses.
Answer: Given Focal length of a convex lens f1 = 30cm Focal length of a concave lens f2 = -20cm... View Article
Tertiary butyl methyl ether on treatment with HI forms :(1) Isobutane and Methyl iodide.(2) Isobutanol and Methanol.(3) Tertiary butyl iodide and Methyl iodide.(4) Tertiary butyl iodide and Methanol.
Answer: (4) CH3 – O – C – (CH3)3 + HI → CH3 – OH + (CH3)3– C-I Tertiary butyl... View Article
Explain the construction and working principle of an electric motor?
Answer: An electric motor is a device that converts electrical energy into mechanical energy. Electric motors and their functions:... View Article
Give information about commonly used gadgets or devices which are based on the principles of newton’s laws of motion.
Answer: Newton’s first law of motion: Every object either remains at rest or uniform motion until and unless a force... View Article
