Why is hydrogen peroxide kept in coloured bottles?
Answer: Hydrogen peroxide is a chemical compound containing molecules of hydrogen and water. Its chemical formula is written as H2O2.... View Article
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The atomic number of chromium is 24 Its electronic configuration in ground state in 1s22s22p63s24s13d5 .Chromium atom by using 3 electron from Cr2+ .A chromium atom contain 17% morte neutron than the proton. Now answer the following questionsThe number of occupied sub- shell in Cr3+ ion is (a) 3 (b) 6 (c) 5 (d) 1
Answer: (1) The atomic number of chromium = 24. The electronic configuration in the ground state is Cr (Z =... View Article
What is the number of spinal nerves in human?
Answer: The spinal nerve is a combined nerve that contains the motor , sensory and autonomic signals between the spinal... View Article
Mouth parts of Cockroach are (1) Piercing and sucking (2) Sucking and siphoning (3) Biting and chewing (4) Spoiging
Answer: The cockroach mouthparts are kind of biting and chewing. Which are used in nutritional searches and intakes. Sections of... View Article
What is the S.I. unit of electrical power?
Answer: Electric power is the rate at which work is done, or energy is transformed into an electrical circuit. It... View Article
The pair of amphoteric hydroxides is (1) AI(OH)3, LiOH (2) Be(OH)2, Mg(OH)2 (3) B(OH)2, Be(OH)2 (4) Be(OH)2, Zn(OH)2
Answer: (4) Explanation An amphoteric substance is an ion or molecule able to act as an acid and as well... View Article
Give one example each of pseudo halide and pseudohalogen.
Answer: Pseudohalides are false halides, and their composition resembles true halides. These are generally weak bases of Lewis which carry... View Article
Why is it necessary to conserve our environment?
Answer: Environmental conservation is necessary for many reasons including the protection of the ozone layer, the sustainability of food chains... View Article
Explain the energy losses in a transformer. How are they minimized?
Answer: A transformer is a device used in the power transmission of electric energy. The transmission current is AC. It... View Article
What is the difference between antibiotics and antibodies
Answer: Antibody (Ab) is also known as an immunoglobulin(Ig). These are large, Y-shaped blood proteins produced by plasma cells. They... View Article
What is the hydrate isomerism? Explain with in example?
Answer: Hydrate isomerism or solvate isomers are a special case of ionisation isomerism in which compounds differ depending on the... View Article
Explain the preparation and uses of nylon-2-nylon-6.
Answer: Nylon 2–nylon-6 is a polyamide copolymerization of glycine (H2N−CH2−COOH) and aminocaproic acid (H2N−(CH2)5−COOH). It is an example of a... View Article
Distinguish between intrinsi and extrinsic semiconductors.
Answer: Semiconductors are the materials which have a conductivity between conductors known as metals and non-conductors or insulators such ceramics.... View Article
Classify the following resources as exhaustible and inexhaustible natural resources :wind, petroleum, coal, natural gas, sunlight, forests, water, minerals.
Answer: Exhaustible Natural Resources – Exhaustible sources are those sources of energy, which will deplete and exhaust after a few... View Article
What are the advantages of intercropping and crop rotation?
Answer: Intercropping Intercropping is the practice of growing more than one crop on the same field at the same time... View Article
Examples of lyophilic colloids are (1) Albumin (2) RBC (3) Smoke (4) Metasulphide
Answer: (1) and (2) A colloid is primarily a heterogeneous mixture in which the minute particles of one substance are... View Article
The actual formula of sodium chloride is: (1) NaCl (2) Na^+Cl^- (3) (Na^+Cl^-) n (4) NanCln
Answer: (3) Sodium Chloride is an ionic compound with the chemical formula NaCl. Since sodium chloride is not a molecule... View Article
What is tonoplast and where it is found?
Answer: The membrane surrounding the vacuole is known as tonoplast. Tonoplast is a single membrane that separates the cytoplasm from... View Article
Monomer used to prepare orlon is (1) CH2=CH – CN (2) CH2=CH ? Cl (3) CH2=CHF (4) CH2=CCl2
Answer: (1) Acrylonitrile ( CH2 = CH – CN) is the monomeric unit of orlon polymer. Orlon is also called... View Article
Define organic evolution. Why is biological evolution called organic evolution ?
Answer: The term “organic evolution” consists of two words organic meaning “living species” and “evolution”, meaning “unfold”. The organic evolution... View Article
