A mixture of iodine and sulphur crystals can be separated by treatment with?
In the preparation of which of the following gases is Kipps apparatus used?
Mild oxidation of propan−1−ol will yield:
The sulphide used in coating electric fluorescent tubes is:
What volume of hydrogen gas is produced at s.t.p when 6.5g of Zinc (Zn = 65) reacts with excess dilute sulphuric acid?
Ethene is prepared industrially by _____
For a reaction to occur spontaneously,
The alloy of aluminium used in the construction of aircraft is _____
A gas X diffuses twice as fast as gas Y. If the relative molecular mass of X is 32, calculate the molecular mass of Y
Which of the following gases is collected by upward displacement of air?
Hydration of ions in solution is associated with
The compound produced when sodium peroxide is heated with excess sodium is
What is the oxidation number of chromium in K2Cr2O7 ?
Which of the following statements is correct about the average kinetic energy of the molecules of a gas?
A compound that gives a brick−red colour to a non−luminous flame is likely to contain _____
The petroleum fraction that is used in heating furnaces is _____
The most suitable method for separating a mixture of ethanol and water is _____
In an electrochemical cell, polarization is caused by _____
Which of these atoms has the least number of electrons in its outermost shell?
Which of the following bond types involves the transfer of elements?
The alkali metals are never found uncombined with other elements in the earth's crust because they
Which of the following is common to all metals?
In electrovalent liquids, the rate of evaporation is usually _____
The addition of charcoal to a filter bed in a town water supply is for the purpose of _____
The following are miscible with water except _____
Potassium vapour burns with a
Butter is an example of emulsion in which
What are The separation techniques involved in obtaining pure alum from powdered mixture of alum and sand?
What changes sodium hydroxide pellets to liquid?
In a given homologous series, successive members differ in their relative molecular mass by:
Which of the following types of bonding does not involve the formation of new substance?
CHCl3 + Cl2 −> HCl + CCl4
The reaction above is an example of?
The bond formed between H2O and H+ to form the hydroxonium H3O+ is:
Which of the following can be used in making perfumes?
Ethyne is passed through a hot tube containing organo−nickel catalyst to produce
On exposure to the atmosphere, a hydrated salt loses its water of crystallization to become anhydrous. This phenomenon is referred to as:
The value of an equilibrium constant Kc is 1.5 × 105 at 298K for a certain reaction. What does this indicate about the reaction?
The number of electronic shells obtained in an atom with electron configuration 1s22s22p63s23p64s2 is _____
If pressure (P) of a gas is increased while its temperature (T) remains constant, what happens to its volume (V)?
The monomer of nylon is
