Q1) Which of the following options is correct regarding the atomic radius of the vion?
Radius Na with Liba +Na
1) NaNa+Li
2) Na+NaLi
3) LiNaNa+
4) NaLiNa+
Q2) According to the elements of the third period of the periodic table
Na Mg Al Si P S Cl Ar
Which element is more metallic?
1) Mg
2) No
3) Ar
4)Al
Q4) Which sentence is correct?
1) Metallic properties also decrease from left to right in a period, just like non-metallic properties.
2) The physical properties of semi-metals are more similar to non-metals, while their chemical behavior is similar to metals
3) Metallic character decreases from left to right in one period and increases from top to bottom in a group.
4) Group 14 of the table includes metals
Q3) Electron arrangement of A2+ ends in Ar, whether it is a metal or a non-metal
Period and element group and. The formula of its oxide is the atomic number of argon (Ar) 18
1) metal -4-2 A2O
2) 42-AO metal
3) Nuffles-24-A2O
4) Naflez-4-2AO
Q5) Which of the following properties is not true about the element lead (Pb, atomic number 15)?
1- It is malleable and does not break due to impact.
2-It shares electrons in the reaction with other atoms.
3- Its surface is bright, it loses electrons in reaction with other atoms.
4- Its surface is bright and conducts heat
Q7) given in the reaction
, 4PH3 + 8O2 → P4O10 + 6H2O
If the percent efficiency of the reaction is 80%, how many moles of water will be produced from 1.5 moles of PH3
1) 1/8
2) 3/6
3) 1/2
4) 18
Q8) Which electron has the highest viscosity?
C12H26, C20H42, C3H8, C5H12
1) C12H26
2) C20H42
3) C3H8
4) C5H12
Q10) Which of the following hydrocarbons has the highest reactivity and why?
1) C2H6 is an alkene
2) C3H6 because it is an alkyne
3) C3H4 is an alkene
4) C3H4 because it is an alkyne
Q11). It is an unsaturated cyclic hydrocarbon that is used in the maintenance of carpets and rugs to prevent willow corrosion.
1) C8H10
2) C10H8
3) C6H6
4) C6H12
Q13) According to the methane burning reaction
CH4+2O2CO2+2H2O+890kj
The heat of reaction for burning 1 gram of methane is several kilojoules
1) 14150
2) 55/62
3) 25/31
4) 28300
Q12) Which of the following statements is incorrect?
1) At a certain temperature, the average speed and the average kinetic energy of the particles are equal
2) The average kinetic energy of particles in a container with a mass of 20 grams of water and a temperature of 25 degrees is equal to a container containing 35 grams of water and a temperature of 25 degrees.
3) The temperature of a material is a measure to describe the speed and total kinetic energy of its constituent particles
4) The smell of hot food comes faster than cold food
Q14) The heat capacity of one mole of hydrogen is 1/4 times the heat capacity of 1 mole of helium. If the same mass of this heat is given to the same amount of heat, the increase in the temperature of helium will be several times the increase in the temperature of hydrogen (temperature in Celsius scale and molar mass of H=1
He = 4
1) 5/6
2) 2/8
3) 11/2
4) 1/4
Q16) The specific heat capacity of sodium chloride is 0.85 joules per gram degree Celsius. If we add 340 joules of heat to 4 grams of this salt, what is the temperature change?
1) 10 degrees
2) 40 degrees
3) 100 degrees
4) 50 degrees
Q15) Some of the changes in subheated states are condensation, evaporation, burning, condensation, evaporation, freezing, melting.
1) 1 item
2) 3 items
3) 4 cases
4) 2 cases
This post is written by Arezoo_a81