Chemistry
25 marks
325 questions · showing 1–50
Paraffins are also called
A green colour is formed in Lassaigne's test if nitrogen is present in an organic compound. This green colour is due, to the formation of
Al4C3 reacts with water to give
Aniline on warming with Benzaldehyde
Which of the following compounds is used as the best anti-knocking agent?
Chloroform reacts with concentrated HNO3 on heating and yields
Which of the following reagents is used to detect the aldehyde group?
Terylene is a
The formula of Zinc blende is
The oxidation state of iron in Mohr's salt is
Which of the following oxides is acidic?
The structure of ammonia molecule is
Orthophosphoric acid is
The formula of Epsom salt is
Ostwald's process is used for the manufacture of
Among the following elements, the one having highest electron affinity is
44 gm of CO2 is equal to
Equivalent weight of potassium dichromate in acidic medium is equal to
The weight of sodium carbonate required to prepare 100 mL of Deci normal sodium carbonate solution is
Which of the following is the unit of surface tension?
Electrons will distribute themselves in degenerate orbitals so as to retain parallel spin as much as possible. This is called
The actual electronic configuration of copper is
If the pH of a solution is 5.2, the hydrogen ion concentration of the solution is
The unit of rate constant for first order reaction is
The enthalpy of formation of the compound is
The gas obtained by adding water on aluminium carbide is
The mixture of HCl and ZnCl2 is known as
The IUPAC name of n-valeric acid is
A blood red coloration of ferric sulphocyanide obtained by addition of ferric chloride in sodium extract confirms the presence of
Which of the following compounds has highest boiling point?
The compound that undergoes Cannizzaro reaction is
Benzene is converted to toluene by
The compound that gives positive carbylamine's reaction is
Hematite is an ore of
is a
Which of the following elements has highest electro-negativity?
Zinc sulphate () is also called
Brass is an alloy of
The formula of dolomite is
The general electronic configuration of zinc is
Equivalent weight of in neutral medium is
Bohr’s model was modified by
How many Oxygen atoms are there in 8.0g of oxygen atoms?
The CGS unit of specific conductance is
What is the pH of 0.001 M HCl?
The rate of reaction is independent of
Hess’s law deals with
The degree of dissociation of an electrolyte
The weight of 100 ml of NH3 gas at NTP is
The law of multiple proportions was given by