List of top Chemistry Questions

What is Lanthanoid Contraction? State its consequences.
Write chemical formula of Iron (III) hexacyanidoferrate (II).
Match the correct pair: Column A Column B (i) Glycogen (a) Picric acid
(ii) Sodium benzoate (b) Secondary valency 6
(iii) 2,4,6-trinitrophenol (c) Food preservative
(iv) \(K_4[Fe(CN)_6]\) (d) Half order
(v) Rate = \(K[A]^{3/2}[B]^{-1}\) (e) Animal starch
Substances have zero resistivity or infinite conductivity known as ________.
Write the chemical name of Vitamin \(B_2\).
Write unit of rate constant for second order reaction.
Bromo, iodo and polychloro derivatives of hydrocarbons are heavier than water. (True/False)
Amines behave as ________ due to presence of an unshared pair of electron on Nitrogen atom.
Contrary to electrophilic addition reactions observed in alkenes, the aldehydes and ketones undergo nucleophilic addition reactions. (True/False)
Conductivity of a solution increases with dilution. (True/False)
Lower aliphatic amines are soluble in water while higher amines are essentially insoluble in water. (True/False)
The most common sugar used in our homes is called as glucose. (True/False)
Value of magnetic moment of a divalent ion in aqueous solution having atomic number 25 will be 5.92 B.M. (True/False)
Only ________ are obtained on hydrolysis of Protein.
All ________ properties of solution are related with decreasing in vapour pressure.
Fuel cells produce electricity with an efficiency of about ________ percentage compared to thermal plants whose efficiency is about 40%.
In addition of bromine in \(CCl_4\) to an alkene resulting in disappearance of reddish brown colour of bromine constitutes an important method for the detection of ________ in a molecule.
Zn, Cd and Hg generally are not considered as ________ elements.
Contrast DNA and RNA or Globular and Fibrous Proteins.
Show how to convert substances like Benzene to Aniline or Phthalimide to N-alkyl phthalimide.
Provide chemical equations for reactions such as Aldol Condensation, Cross Aldol Condensation, Wurtz Reaction, Fittig Reaction, and Hoffmann Bromamide Reaction.
Explain why Scandium (Z=21) is a transition element while Zinc (Z=30) is not.
Why do transition elements (d-block) show variable oxidation states and magnetic properties?
Define Specific Conductivity and Cell Constant, including their units.
Differentiate between the Order of Reaction and Molecularity.