What do you observe on churning the milk?
While churning the milk, a physical process of separation of milk particles is conducted in which the composition of milk... View Article
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On which factors does cooling of water depends?
If the container is copper , then the water will cool a lot faster than if the container were plastic.... View Article
When water solidifies to ice then heat is a) Liberated b) Absorbed c) No change d) Depending on the condition heat may absorbed or liberated.
The process of converting liquid to ice is called as freezing. During freezing, the energy lost by water molecules is... View Article
Evaporation of material takes place-above its boiling point a) above its melting point b) below its boiling point c) below its melting point
Evaporation is the process of molecules leaving the surface of a liquid and entering the space beyond the surface. It... View Article
Which of the following is affected by catalyst? (a) ∆H (b) ∆S (c) ∆G (d) Ea
Answer: Option (d) Ea A Catalyst is a substance that changes the reaction rate without affecting the overall energetics of the... View Article
Which of the following has cross-linked polymer chains? A) bakelite B) polyester C) PVC D) nylon
Bakelite is a condensation polymer of formaldehyde and phenol. Bakelite is a thermosetting plastic which is a poor conductor of... View Article
Which acid is the queen of acids?
Nitric Acid (HNO3) is known as Queen of acids. It is fuming and corrosive. It is a powerful oxidizing agent,... View Article
How is ammonia gas be liquefied?
By applying high pressure and lowering the temperature the ammonia gas can be liquified. When a high pressure is applied... View Article
What is the major product of chlorination of ethyl benzene?
Major product of chlorination of ethyl benzene is 1-chloro-1-phenylethane. In this reaction, C6H5-CH(Cl)-CH3 (1-chloro-1-phenylethane) which is 2° alkyl halide is... View Article
What is the n factor of CO2?
n factor for acids is its basicity,ie, no of replaceable hydrogen ion per molecule. For a base number of OH-... View Article
How Formic acid and formaldehyde can be distinguished?
Formic acid and Formaldehyde when treated with NaHCO3( sodium bicarbonate) Formic acid liberates CO2 on reaction with NaHCO3 while formaldehyde... View Article
State the principle for separation of immiscible liquids
Immiscible layers separate out in layers depending on their densities in separating funnel. For example: Kerosene oil and water can... View Article
Calculate the molar mass of oxalic acid (C = 12, O = 16, H = 1)
Answer: Relative molar mass is defined as the smallest mass unit of a compound with one-twelfth of the mass of... View Article
How to calculate the number of electrons?
The number of electrons in a neutral atom is equal to the number of protons. The number of protons in... View Article
Give 10 examples of amorphous solids and crystalline solids.
Amorphous Solids are solids where the constituent particles of the matter are arranged in the random manner whereas crystalline Solids... View Article
What happens when copper carbonate is heated? Mention the type of reaction.
When green copper carbonate{CuCO3} is heated it decomposes forming copper oxide {CuO} and carbon dioxide {CO2}. This is a decomposition... View Article
Give full forms of PGA, OAA, RuBP
The full form of PGA – 3-phosphoglycerate. The full form of RuBP – Ribulose 1,5-bisphosphate. The full form of OAA... View Article
How to write formula for calcium carbonate by using the criss-cross method?
An alternative way to writing a correct formula for an ionic compound is to use the criss-crossmethod. The numerical value... View Article
Which material is the best conductor? Does it use for electrical transmission? Give reason
Though silver is a very good conductor of electricity primarily due to its cost, that is not used in electric... View Article
Define ebullioscopic constant.
Answer: Molal elevation constant or ebullioscopic constant is defined as the elevation in boiling point when one mole of non-volatile... View Article
