Why the ease of dehydration of alcohols follows sequence, tertiary> secondary> primary?
The ease of dehydration of alcohols follows a sequence, tertiary> secondary> primary. The reason for the ease of dehydration of alcohols... View Article
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Which of the following is an example of a co-polymer? a.Nylon b.Polyester c.Teflon d.Buna-S
(d) Buna-S Buna-S is a copolymer of butadiene and styrene. What is a copolymer? A copolymer is a polymer that... View Article
Choose the metal that is not attracted by magnet: i) Cobalt ii) Iron iii) Nickel iv) Silver
(iv) Silver Silver is not attracted by a magnet. Some of the metals that are magnetic include iron, cobalt, nickel... View Article
What are the important precaution that should be taken while handling radioactive materials?
Radioactive elements are made up of atoms whose nuclei are unstable and give off atomic radiation as part of a... View Article
From these two angles which has larger measure? Estimate and then confirm by measuring them.
Second angle has larger measure.
Explain why some of the leaves may get detached from a tree if we vigorously shake its branch
Some leaves of a tree get detached when we shake their branches vigorously because branches come in motion, while the... View Article
Which of the following base is not found in DNA? a. Adenine b. Guanine c. Cytosine d. Uracil
(d) Uracil DNA does not contain uracil. RNA contains Uracil in place of Thymine, which is the pyrimidine base of... View Article
What is the term used for the photoreceptor cells of the retina which is sensitive to colour?
The photoreceptor cells of the retina sensitive to colour are Cones. Cones are the nerve cells that are more sensitive to... View Article
Which one of the following bases is insoluble in water? a. NaOH b.KOH c.MgO d. NH3
(c) MgO A base like magnesium oxide (MgO) is insoluble in water. Why MgO is insoluble in water? In the... View Article
Explain how does placing of tea in closed vessel help in understanding system and surrounding?
A system that can exchange energy with the surroundings but not mass is called a closed system. When tea is... View Article
Which of the following elements will have the largest atomic radii? i) Cl ii) Br iii) Na iv) K
The correct option iv) K The Atomic radii increases down the group as the number of shells increase down the... View Article
How chemosynthetic autotrophic bacteria recycles nutrients like nitrogen, phosphorus, sulphur?
Chemosynthetic autotrophic bacteria play a great role in recycling nutrients like nitrogen, phosphorous, iron and sulphur. Chemosynthetic autotrophic bacteria oxidise various inorganic substances to obtain... View Article
Which of the following is an example of an amphoteric oxide? i) SO2 ii) P2O5 iii) BaO iv) ZnO3
(iv) ZnO Zinc oxide shows acidic as well as basic behaviour. Amphoteric oxides Amphoteric oxides are compounds of oxygen that... View Article
Which of the following will melt between 500°C to 1500°C ? a. Sugar b. Grpahite c.Glass d. Salt
(c) Glass Sugar, graphite and salt three are crystalline so they will have a sharp melting point while glass is... View Article
Choose the metal that does not react with acid to give off hydrogen: i) Cu ii) K iii) Na iv) Al
(i) Cu Copper (Cu) comes below hydrogen in the activity series. Hydrogen cannot be displaced from metals that are below it... View Article
Which one of the following is a poor conductor of heat? a.Silver b.Copper c.Mercury d.Aluminium
(c) Mercury Mercury is a relatively poor conductor of heat. The materials which cannot transfer heat are poor conductors. Mercury... View Article
Which of the following belongs to the actinoids series of elements? i) La ii) Lu iii) U iv) Sm
(iii) U Uranium (U) belongs to the Actinides series of elements. What are actinides? The second series of f block... View Article
Which of the following is not a product of respiration? a) Carbondioxide b)Water c)Oxygen d)ATP
(c) Oxygen During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell. Carbon... View Article
What are the different ways in which glucose is oxidized to provide energy in various organisms?
Glucose is a vital energy source for all organisms. The nutrition consumed is converted into carbohydrates, in which glucose is... View Article
Which of the following does not form M3+ more easily among group 13 elements? i) B ii) Al iii) Ga iv) In
(i) B Because of their high ionisation energies, all the elements of Group 13 form covalent compounds. But due to... View Article
