Difference between coprecipitation and post precipitation
Coprecipitation is a kind of precipitation where soluble compounds in a solution are eliminated during the course of precipitation Post... View Article
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Why does sodium keep immersed in kerosene oil?
Sodium is a highly reactive metal and reacts vigorously with the oxygen, carbon dioxide and moisture present in the air... View Article
Name a non-metal which is a good conductor of electricity
Graphite is a non-metal which conducts electricity. This crystal carbon has a structure that is planar and layered. Graphene is... View Article
Define the term brisk effervescence?
Brisk effervescence is defined as the rapid or vigorous evolution of a gas in a chemical reaction. It is evidence... View Article
What is the formula of rectified spirit?
Rectified spirit is a very powerful stimulant. The formula of rectified spirit is C2H5OH. Explanation Ethanol of about 95 per... View Article
Give two important uses of washing soda and baking soda.
Answer: Baking soda Baking soda is the common name of sodium bicarbonate. The chemical formula of baking soda is NaHCO3. Sodium... View Article
Which of the following is most elastic? a) Steel b) Rubber c) Glass d) Sponge
Steel is more elastic. What is Young’s modulus? Young’s modulus defines the relationship between stress (force per unit area) and strain... View Article
Name the softest metal
Caesium is considered to be the softest metal, and Lead is considered one of the softest metals. Answer 3: Mercury... View Article
Which of the following does not form an acidic salt? (a) Phosphoric acid (b) Carbonic acid (c) Hydrochloric acid (d) Sulphuric acid
Carbonic acid does not forms acidic salt. Explanation Carbonic acid is a carbon-containing compound which has the chemical formula H2CO3.... View Article
In an S N1 reaction of alkyl halide on chiral centres there is _______
In an S N1 reaction of alkyl halide on chiral centres there is inversion more than retention to partial racemization.... View Article
Why is the dipole moment of CH4 zero?
The dipole moment of methane CH4 is zero. Explanation The CH4 is tetrahedral in shape and due to this structure,... View Article
Name the ash formed on burning of magnesium ribbon
Ash from magnesium ribbon is magnesium oxide. Explanation When magnesium ribbon is burnt in air, it combines with oxygen to... View Article
How does the chick recognise her own mother?
The chick bonds with mom soon after hatching. The process is called imprinting. It involves vision, hearing and olfaction along... View Article
Why does cactus have so many thorns or spines?
Most cactus species don’t have true leaves or branches. Instead, they have highly modified branches called areoles – the tiny... View Article
How does the bee know which flower has nectar?
Bees can sense electrical charge of flower having nectar. If flower’s nectar has already harvested by any other bee it’s... View Article
What is the full form of 1) DPT 2) DDT 3) BCG?
DPT stands for diphtheria-pertussis-tetanus. It is a vaccine that provided protection against the three diseases. DDT Stands for dichloro-diphenyl-trichloroethane, it... View Article
What is embryonal axis?
A typical dicotyledonous embryo, consists of an embryonal axis and two cotyledons. The Embryonal axis has two main parts :... View Article
What is stock and scion in grafting?
Scion is the detached living part of the plant which is grafted to the stalk by the process of grafting.... View Article
What is the minimum and maximum body temperature?
The average normal body temperature is generally accepted as 98.6°F (37°C). Few research studies have shown that the ‘normal’ body... View Article
What are scientific names of dog, cat, buffalo, fox, cow and ox?
Scientific names of dog,cat,buffalo,fox,cow and ox are Dog – Canis lupus familiaris Cat – Felis catus Buffalo – Bubalus bubalis... View Article
