Chemistry 1st secondary
Chemistry Fundamentals Quiz
Test your knowledge in chemistry with this engaging multiple-choice quiz designed for 1st secondary students. Challenge yourself with 20 carefully crafted questions covering various topics such as chemical reactions, molecular formulas, and more!
Topics included:
- Atomic Structure
- Stoichiometry
- Molar Mass Calculations
- Chemical Reactions
- Nanoparticles and Their Properties
The number of atoms in sodium sulphate is :
4 atoms
5 atoms
6 atoms
7 atoms
The number of atoms in Magnesium Bicarbonate is :
4 atoms
5 atoms
6 atoms
7 atoms
Use when you need ( N= 14 , H = 1 , O = 16 , C = 12 , S = 32 , Mg = 24 , Al = 27 , Ca = 40 , Fe = 56 , Na = 23 ) The limiting substance and remaining when 5 grams of CH4 with 14 grams of H2O in the following reaction : H2O + CH4 --> 3H2 + CO
Limited is H2O and remaining = 9 grams
Limited is CH4 and remaining = 8.37 grams
Limited is CH4 and remaining = 9 grams
Limited is H2O and remaining = 8.37
The percentage of yield for a reaction between 20 grams of sodium chloride solution with an excess amount of silver nitrate , if 45 grams of AgCl is precipitated from this reaction. ( Cl = 35.5 , Ag = 108 )
20%
37.71%
91.74%
15%
The empirical formula of the compound which contains 25.92% of nitrogen and 74.07% of oxygen is :
N2O5
N3O2
NO
NO2
The coefficient after balancing this equation : Iron + Hydrochloric acid —> Iron II Chloride + Hydrogen
1 , 2 , 1 , 1
1 , 1 , 1 , 2
2 , 1 , 2 , 1
2 , 2 , 1 , 1
The volume of 3.2 grams of O2 gas at STP
22.4
44.8
2.24
88.2
Acid is formed from 40% of Carbon , 6.67% of Hydrogen and 53.33% of Oxygen and it’s molar mass is 60 g/mol . The empirical and molecular formulas of this acid :
CHO
CH2O
CH3O
CH2
The molar mass of hydrated iron III chloride FeCl3 . 6H2O.
270.5 g/mol
260.5 g/mol
230.5 g/mol
200 g/mol
The number of atoms in 1 mol of carbon monoxide is :
28 X 6 X 10*23
6 X 10*23
28 X 10*23
2 X 6.02 X 10*23
When 14 grams of CO gas react with an excess amount of oxygen , the volume of produced CO2 at STP is : ..... L
22.4
44.8
11.2
89.6
Element X2 react with Y2 to produce X2Y3 , the coefficient is :
2 , 3 , 1/2
1/2 , 2 , 3
2 , 3/2 , 3
2 , 3 , 2
All of the following are three - dimensional Nano substances , except :
Nano shell
Bucky ball
Thin films
Carbon nano tube
Which of these statements about nanoparticles is correct ?
They have large volume to surface areas ratios.
They have large surface area to volume ratios.
They have small surface area to volume ratios.
They have constant surface area to volume ratios.
Which of the following is used to determine the volume of body which doesn’t dissolve in water ?
Burette
Pipette
Graduated cylinder
Beakers
The mass of 3 mol of iron III oxide is :
160 grams
320 grams
480 grams
620 grams
The weight percent of oxygen in H2O is :
18%
81.88%
88.88%
36%
The molecular formula of a hydrocarbon compound whose molecular mass is 58 grams. Knowing that a sample of it consists of 48 grams of carbon and 10 grams of hydrogen.
C2H2
C4H8
C4H6
C2H6
The number of sodium ions produced from dissolving 117 grams of sodium chloride in water :
8.23 X 10*23
8.24 X 10*24
12.04 X 10*24
4.84 X 10*23
What is the coefficient needed to correctly balance the following equation ? Fe + O2 —> Fe3O4
1 , 4 , 4 , 1
3 , 2 , 1
4 , 2 , 3 , 1
No correct answer
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