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Which gas is released during preparation of bread is. a) Nitrogen. b) Oxygen c) Carbon dioxide d) hydrogen

CO2 (Carbon dioxide) is released when bread is baked. During fermentation yeast cells produce Carbon dioxide rapidly, which forms the pores in... View Article

Differentiate between saturated and unsaturated solutions.

Answer: A solution is defined as a homogenous mixture that mainly comprises two components namely solute and solvent. Depending upon the... View Article

What is the number of moles of KMnO4 that will be needed to react with one mole of sulphite ions in acidic solution?

The reaction is 2MnO4− + 5SO32− + 6H+ → ;2Mn2+ +5SO42− + 3H2O So one mole of sulphire ion will need 2/5 moles of KMnO4... View Article

How to convert ethyne to benzene?

When ethyne gas is passed through the red-hot iron tube, it leads to the formation of cyclic aromatic compound. When acetylene is heated in... View Article

State Distribution Law and give its three applications.

The distribution law states that a solute gets distributed between the two layers of immiscible solvents in such a way that the ratio of its... View Article

Differentiate between exhaustible and inexhaustible resources.

Exhaustible resources Inexhaustible resources These resources are non-renewed once exhausted. These are renewable or replenishable... View Article

When an electric current is passed, electrons move from (a) High potential to low potential. (b) Low potential to high potential. (c) Electrons flow from lower to higher potential except through power sources. (d) Electrons flow from higher to lower potential, except through power sources.

Answer: (b) Low potential to high potential. The (+) terminal of a battery has a higher potential than the (-) terminal. In a way, the higher... View Article

Which of the following has zero dipolemoment? a) ClF b) PCl₃ c) SiF₄ d) CFCl₃

Dipole moment is the measurement of polarity of a bond. If the molecule has some net dipole moment then it means the molecule is over all polar.... View Article

How to find the molecular mass of K₂CO₃?

The total sum of the masses of the atoms or elements present in the molecule is termed as molecular mass. K2CO3 molecular mass The atomic mass... View Article

The first manmade fibre is: (a) Nylon (b) Rayon (c) Polyester (d) Silk

The first man made fibre is NYLON. Nylon is a well-known synthetic polymer (derived from the Greek words ’poly’ meaning... View Article

Give examples for allylic halides.

Allylic halides are the compounds in which the halogen atom is bonded to sp 3 −hybridised carbon atom next to carbon-carbon double bond... View Article

What is carbonisation?

Carbonization is the conversion of an organic substance into carbon or a carbon-containing residue through pyrolysis or destructive distillation.... View Article

Bakelite is an example of ________ plastics

Bakelite is one example of a thermosetting polymer. A thermosetting plastic is a polymer that irreversibly becomes rigid when heated. Such a... View Article

Why oxygen is called gas?

Answer: In the periodic table, oxygen belongs to the chalcogen group. It is a necessary component in the majority of combustion processes. It’s... View Article

Write down the names of composite radicals

An atom or an ion or a molecule that has a free valence electron that is unpaired is termed as a 'Radical'. Some composite radicals are listed... View Article

Give reasons for the following. a) Aluminium foils are used to wrap food items. b) Immersion rods for heating liquids are made up of metallic substances. c) Copper cannot displace zinc from its salt solution. d) Sodium and potassium are stored in kerosene.

Answer: (a) Aluminium foils are used to wrap food items because aluminium metal is malleable. Therefore, it can be beaten into thin foils. (b)... View Article

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