Which one of the following ores is best concentrated by froth floatation method?

Extraction of copper by smelting uses silica as an additive to remove :

18 g glucose (C6H12O6) is added to 178.2 g water. The vapor pressure of water (in torr) for this aqueous solution is :

An aqueous solution of a salt MX2 at certain temperature has a van’t Hoff factor of 2. The degree of dissociation for this solution of the salt is :

The solubility of N2 in water at 300 K and 500 torr partial pressure is 0.01 g L−1. The solubility (in g L−1) at 750 torr partial pressure is :

The equilibrium constant at 298 K for a reaction A + B $$\leftrightharpoons$$ C + D is 100. If the initial concentration of all the four species were 1M each, then equilibrium concentration of D (in mol L–1) will be:

A solid XY kept in an evacuated sealed container undergoes decomposition to form a mixture of gases X and Y at temperature T. The equilibrium pressure is 10 bar in this vessel. Kp for this reaction is :

BOD stands for :

Which one of the following substances used in dry cleaning is a better strategy to control environmental pollution?

The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb, 40 ppb, 100 ppm and 0.2 ppm, respectively. This water is unsuitable for drinking due to high concentration of :

In the Hofmann bromamide degradation reaction, the number of moles of NaOH and Br2 used per mole of amine produced are:

The test to distinguish primary, secondary and tertiary amines is :

Fluorination of an aromatic ring is easily accomplished by treating a diazonium salt with HBF4. Which of the following conditions is correct about this reaction ?

The “N” which does not contribute to the basicity for the compound is :

What will occur if a block of copper metal is dropped into a beaker containing a solution of 1M ZnSO4?

Identify the correct statement :

Oxidation of succinate ion produces ethylene and carbon dioxide gases. On passing 0.2 Faraday electricity through an aqueous solution of potassium succinate, the total volume of gases (at both cathode and anode) at STP (1 atm and 273 K) is :

Galvanization is applying a coating of :

Which of the following statements about low density polythene is FALSE ?

Which of the following polymers is synthesized using a free radical polymerization technique ?