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Total questions: 50
Worksheet time: 25mins
Select an oxygen-free acid formula:
NCL
KN
H3PO4
NaOH
The molecule is…
the smallest particle of a substance that has its basic properties and is capable of independent existence;
a physical quantity characterized by the number of structural particles contained in a given system;
the smallest particle of a chemical element that has the same charge of the nucleus and has inherent chemical properties;
the amount of substance in the system that contains as many structural units (atoms, molecules) as the number of atoms contained in 0.012 kg of carbon -12
A certain type of atom is:
is a chemical element;
the physical body;
the substance;
the molecule.
What system do we call an open system?
When the system qitself has a metabolism and energy exchange with the environment
If the system exchanges itself with the environment only with its energy without metabolism
If the system does not exchange itself with the environment, neither matter nor energy
Systems in which the phases that make up the system are in each state
What system do we call a closed system?
If the system exchanges itself only with its energy without the environment and metabolism
If the system exchanges itself with the environment and with matter and energy
Systems in which the phases that make up the system are in the same state
Systems in which the phases that make up the system are in each state
What is a phase?
The parts of the body that make up the system are limited to a surface in a certain space, and we mean that the chemical composition of the part is the same as the thermodynamic properties of the part
The spatial part of the environment to be studied
A body or a set of objects that are in thermal and mechanical interaction with each other, mentally separated from the external environment
A system that can only exchange energy without the environment and metabolism
What phenomenon do we call an adiabatic phenomenon?
Heat with the external environment is also a phenomenon that occurs without Exchange in matter ' i.e. occurs in isolated systems
A phenomenon in which the value of the heat capacity of the system is constant
Chemical and phase-a phenomenon that describes the equilibrium state of the island
adiabatic phenomenon-a phenomenon that studies the transformation of energy released as a result of a chemical reaction
What is an isolated system?
If the system does not exchange itself with the surrounding environment, etc., there is no metabolism
The relationship between the system and the environment surrounding it is carried out through energy types, where matter is not exchanged
If the system does not replace itself with the environment
If the system does not exchange energy with the environment
Heterogeneous system :
Multi-phase system
Non-interchangeable with the environment
A system in which energy exchange takes place
Heat exchange with the environment
Homogeneous system:
Single phase system
Multi-phase system
Non-interchangeable with the environment
Heat exchange with the environment
What do we mean by a system?
The spatial part of the environment to be studied
Phases in one state
Substances with the same thermodynamic properties
Chemical and phase intermediate equilibrium state
What is chemical thermodynamics?
Considers the transformation of different forms of energy between themselves, the transformation of energy released as a result of a chemical reaction
The interchangeability of different forms of heat involves the conversion of energy released as a result of a chemical reaction
The possibility of a chemical reaction
Energy is transferred from one type to another
With increasing temperature, the adsorption coefficient in the catalytic process:
decreases;
increases;
remains constant;
increases with intense stirring;
Langmuir adsorption isotherm:
degree of filling with catalyst;
catalyst utilization rate;
adsorption coefficient;
adsorption
Which indicator is mandatory for industrial catalysts:
mechanical strength;
ignition temperature;
porosity;
amorphousness;
The ideal criterion for production efficiency is:
service life of devices;
degree of conversion;
production of products;
healthcare workers;
Renewable energy resources include:
solar energy, wind energy;
electric, thermal energy;
magnetic, electric;
electrostatic;
Raw materials according to their aggregate composition are classified into:
solid, liquid, gaseous;
plastic, semi-plastic;
natural and artificial;
in a plasmatic state;
Based on their origin, raw materials are classified into:
mineral, plant, animal;
fossils, renewable;
non-metallic;
Ore
Chemical method of wastewater treatment:
neutralization;
filtration;
resettlement;
adsorption;
Secondary energy resource generated during the production of sulfuric acid:
roasting gas;
flue gases;
juice steam;
flue gases;
Platriforming is the process of reforming:
aluminum-platinum catalyst;
vanadium catalyst;
tungsten catalyst;
iron catalyst;
Thermal cracking of oil is carried out when
400-450°C
450–470°C;
400-480°C;
420-440°C;
Uranium mines in our region are located:
in the Suzak region;
in the Tyulkubas district;
in Sairam;
in Langer;
In the production of sulfuric acid the following is used:
combined scheme
cyclic chain
circuit break
bypass circuit
For firing sulfur pyrite, use:
open circuit;
closed circuit;
cyclic chain;
bypass circuit;
Inter-technological communication is used in production for the purpose of:
efficient use of energy in housing and communal services;
increase in unit power of units;
integrated use of raw materials;
increasing the degree of processing of raw materials;
When designing and operating production, the following are used:
technological scheme;
block diagram;
operator diagram;
functional diagram;
On the technological diagram, each element is depicted as:
conventional generally accepted image;
rectangle;
blocks;
technology operator;
Reason for turning off the catalyst:
the effect of catalytic poison;
change in the chemical composition of the catalyst;
reducing contact time;
increasing the volumetric velocity of the reagent;
The decisive role in the heterogeneous catalytic process is played by the stage:
adsorption of reagents;
internal diffusion;
external diffusion;
chemical reaction;
One of the main requirements for industrial catalysts:
resistance to poisons;
activity;
ignition temperature;
porosity;
Requirements for industrial catalysts:
high performance
high activity;
ignition temperature;
degree of conversion;
How can the driving force of a heterogeneous process be increased?
removing products from the reaction zone;
increased blood pressure;
increase in temperature;
intensive mixing;
How does increasing the concentration of the reagent affect the rate of the chemical stage?
increases;
does not affect;
reduces;
increases at high temperatures;
The main disadvantage of a fluidized bed furnace:
significant dust removal;
low productivity;
low phase contact surface;
low speed of the process;
First stage of soda ash production:
cleaning of raw brine;
ammoniation of brine;
carbonization of ammonia brine;
calcination of sodium bicarbonate;
The social criterion for production efficiency is:
standard of living of labor;
output product;
product quality;
degree of automation
Methanol content in the contact gas after the synthesis of the column:
4%
14%
20%
50%
The catalyst for low-temperature conversion of monoxide included:
zinc-chrome-copper;
iron-chrome;
nickel;
cobalt;
Temperature of steam-oxygen methane conversion:
800°С
150°С
300°С
350°С
If the catalyst is one of the reacting substances, then this catalytic process:
autocatalytic;
monotonous;
homogeneous;
enzymatic;
The action of a catalyst is to:
decrease in energy;
reducing the driving force of the process;
increasing the phase contact surface;
increasing the process temperature;
Mechanical method of enrichment of production.
gravitational;
flotation;
combustion;
electromagnetic;
Higher octane number:
120
100
150
95
The limiting stage is:
Slowest stage
the fastest stage;
chemical reaction;
stage with the least resistance;
The temperature conversion of the oxide is closed on the iron-chromium catalyst:
450-500°C
150-180°C
200-300°C
550-600°C
Motor fuel is divided into:
carburetor and diesel;
automobile and tractor;
aviation;
tractor;
For ion water purification the following are used:
cation exchangers and anion exchangers;
membranes
electromagnetic field;
polysulfides;
One of the ways to obtain high molecular weight compounds:
polymerization;
correction;
extraction;
neutralization;
