What is the ratio of sigma and pi bonds in benzene?
The molecular formula of benzene is C 6 H 6 . Benzene molecule contains 12 σ and 3 π bonds.... View Article
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Name any two soft metals.
Soft metals are those which can be cut and easy to dent, work, or cut without shattering, malleable.Sodium metal is... View Article
What is the mass of (a) 1 mole of nitrogen atoms? (b) 4 moles of aluminium atoms (Atomic mass of aluminium = 27) (c) 10 moles of sodium sulphite (Na2SO3)
Answer: A mole is defined as the amount of a substance that contains exactly 6.02214076 X1023 elementary entities of the... View Article
Gold, Petroleum and coal are examples of – (a) Minerals (b) Rocks (c) Fossils (d) Stones
Answer: (a) Minerals. Gold, petroleum and coal are examples of Minerals. Minerals A mineral is a naturally occurring inorganic solid... View Article
How to convert chlorobenzene into aniline?
When aniline under goes diazo nium reaction in presence of sodium nitrite and hydrochloric acid under 273K- 278K temperature ,... View Article
What is intermolecular space?
The space or gab between the molecules of the matter ex soild, liquid, gas called intermolecules space. The molecules of... View Article
Explain the statement metal oxides are basic in nature
Metallic oxides are basic in nature because they react with dilute acids to form salt and water. Group 1 &... View Article
What is the colour of Zinc metal? a) reddish-brown b) silvery C) white D) grey
Zinc is a bluish-silver, lustrous metal that tarnishes in moist air, producing a layer of carbonate. Zinc reacts with both... View Article
What is the colour of barium sulphate precipitate in the reaction of barium chloride and sodium?
On mixing a solution of barium chloride with sodium sulphate, a white precipitate of barium sulphate is immediately formed. These... View Article
What type of change is the melting of wax?
On heating, candle wax melts and form liquid wax. It is a physical change. Since it again turns into solid... View Article
Milk is an example of A) Emulsion B) Solution C) Gel D) Suspension
Milk is an emulsion of oil in water. A suspension of droplets of one liquid in another is called emulsion,... View Article
An emulsion is a colloidal solution formed by mixing (A)Two immiscible liquids (B) Two missile liquid (C) Any two solid (D) Any two gases
Answer: (A) Two immiscible liquids An emulsion can be defined as a colloid consisting of two or more non-homogenous types of... View Article
What will produce when Nitrobenzene on reaction with Sn/HCl?
Answer: When nitrobenzene is reduced with a metal and acid (Sn/HCl, Zn/HCl etc.), aniline is obtained. The intermediate products nitrosobenzene... View Article
The equivalent weight of H3PO2 when it disproportionate into PH3 and H3PO3 is?
The disproportionation reaction is 3H3PO2 → PH3 + 2H3PO3. Now the conversion of H3PO2 to PH3 involves the addition of... View Article
Give the general electronic configuration of lanthanides and actinides?
Lanthanides are the elements which follow the rule of Afbau’s principle. For that particular reason they are placed under the... View Article
Calculate the formula unit mass of CaCl2.
Formula unit mass is defined as the sum of the mass of all the atoms each multiplied its atomic masses... View Article
How convert to aniline to flourobenzene?
The Schiemann reaction (also called the Balz–Schiemann reaction) is a chemical reaction which a primary Aromatic amine (Aniline) is transformed... View Article
How many metres is one nanometre?
One nanometre converted into a meter equals = 0.0000000010 m 1 nm = 0.0000000010 m A nanometre is a unit... View Article
Mention the nature of toothpaste. How do they prevent tooth decay?
The nature of toothpaste is alkaline which is basic. They neutralize the acid produced by bacteria in mouth. There are... View Article
Balance the following chemical equations. (a) HNO3 + Ca (OH)2 → Ca (NO3)2 + H2O (b) NaOH + H2SO4 → Na2SO4 + H2O (c) NaCl + AgNO3 → AgCl + NaNO3 (d) BaCl2 + H2SO4 → BaSO4 + HCl
Answer: The representation of a chemical reaction in the form of substances is known as a chemical equation. The equation... View Article
