Calcareous material includes limestone, marble, and chalk.
The synthesis of cement involves both dry and wet processes.
The charge in a rotary kiln passes through four zones: dry zone, decomposition zone, burning zone, and cooling zone.
The most suitable catalyst for ammonia synthesis is Fe in a fused mixture of Al2O3, SiO2, and MgO.
The percentage of nitrogen in urea is 46%.
Diammonium phosphate (DAP) provides both nitrogen and phosphorus to the plant.
Cement is a mixture of clay, limestone, and gypsum.
The substance with the greater percentage in cement is lime (CaO).
The correct sequence of steps for the manufacture of cement is crushing, grinding, mixing, and heating.
The composition of the mixture of clay and limestone in the raw material for cement is 75% limestone and 25% clay.
The important function of the burning zone in the rotary kiln is the combination of different oxides like CaO, SiO2, Fe2O3, and Al2O3.
Nitrogen’s importance includes enhancing plant growth, involvement in the synthesis of proteins and nucleic acids, and increasing resistance against diseases.
The macronutrient among the options is Cl (chlorine).
Activated complex is formed due to effective collision.
The substances that reduce the effectiveness of a catalyst are called poisoning catalysts.
The periodic table provides a basic framework to study elements with respect to their physical properties, chemical properties, and properties of their compounds.
The first-order reaction obeying the relation t1/2 = 1/Ka is a second-order reaction.
Elements in the same vertical group of the periodic table have the same number of valence electrons.
The concept of Triads was introduced by Dobereiner.
The elements with similar chemical properties appear in the same family.
The atomic radii decrease by increasing atomic number in alkaline earth metals (II-A Group).
Phosphorus helps in the growth of seeds.
Catalysts and reactants are not in the same phase in heterogeneous catalysis.
The sequence of zones in the rotary kiln is dry zone, decomposition zone, burning zone, and cooling zone.
The rate of reaction decreases as the reaction proceeds.
The rate expression with a negative concentration of reactants shows a decrease in the concentration of reactant.
Energy of activation for the backward reaction is less than the forward reaction for an endothermic reaction.
Spontaneous reactions are fast.
The unit of the rate of reaction is moles per decimeter cubed per second (moles dm-3 sec-1).
The rate of disappearance of a reactant is equal to the rate of the reaction.
For a 3rd order reaction, the half-life is inversely proportional to the initial concentration of reactants, squared.
Radiations are absorbed in the spectrophotometer method.
Energy of the reactant higher than the energy of the product favors an exothermic reaction.
A substance that increases the reactivity of an enzyme is called a promoter.
An enzyme has its specificity due to its structure.
A catalyst cannot affect the products or chemical equilibrium.
Biocatalytical proteins are enzymes.
An enzyme’s end name is -ase.
To determine the order of reaction, we use the half-life method.
When the reaction completes in more than one step, it is called a complex reaction.
The enzymes are specific and sensitive to pH and temperature.
The terminal product in the enzymatic reaction does not affect the reaction.
The law of mass action is not applicable to enzymatic reactions.
The general order of the reaction is given by the sum of the powers of the concentration of the reactant.
A catalyst accelerates the rate of reaction.
In the fermentation process, alcohol is not obtained from glucose.
Enzymes are less effective at low temperatures.
Zeolites are not used as catalysts in the industry.
Catalysis is a surface phenomenon.
Catalysis is the change in the speed of the reaction.
Hydrolysis of an ester in alkaline medium is not a reversible reaction.
The first-order reaction’s unit of rate constant is dm³/mol/sec.
Bases produce hydroxide ions (OH-) in aqueous solutions.
The chemical species that donate protons or accept electron pairs are called Lewis acids.
Methyl orange is a natural indicator.
Bases have a slippery feel.
The products of a neutralization reaction are salt and water.
A solution with pH 7 is neutral.
Phenolphthalein is a suitable indicator for an acidic solution.
