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Worksheetsprelim
Total questions: 40
Worksheet time: 38mins
Proteins are composed of four elements, namely, carbon, hydrogen, oxygen and what other element?
magnesium
Nitrogen
Phosphorus
Sulfur
Which of the following is always true about active ingredients?
They are the cause of the health risks of products.
They constitute the large percentage of a product.
They are more hazardous than inactive ingredients.
They dictate the efficacy of the product for its intended purpose.
Aluminum oxide
(a)
C7H6O3 plus oxygen
(a)
Propane (C2H6) plus oxygen
(a)
The excessive consumption of carbohydrates is converted into which polysaccharides stored in the liver and muscle
Creatinine
Glycogen
hemoglobin
Uric acid
Carbon + water
(a)
8. A theory whose premise is : molecules have to collide to react.
Theory of Evolution
Collision Theory
Constitutional Theory
Lewis Theory
1. The attractive forces present between molecules.
Intermolecular Forces
Normal Force
Air Force
Atomic Force
11. Beneficial in removing hard water deposits, discoloration from aluminum, brass, bronze, copper and iron rust stains.
Zonrox
Acid
Base
Dishwashing Liquid
Identify the product for this reaction.
CH3CH=CH2
CH3CH(SO4)CH3
CH3CH=CH3
CH3CH(OH)CH2(OH)
The number is placed in front of a chemical formula to balance a chemical reaction.
Coefficient
Subscript
Superscript
Significant Figures
Predict the products for the this reaction:
Ag3N + KCl →
AgCl + K3N
AgK + ClN3
AgN3 + KCl
KAg + N3Cl
6. It is a physical substance that is used to make things.
Molecules
Atoms
Material
Matter
What are the products for this combustion reaction:
C2H4 + 2 O2 →
C2O2 + H4
CO2 + HOH
CO + H
CO2 + H2O
9. A substance that increases the rate of a chemical reaction without itself being consumed by the reaction.
Solution
Solvent
Catalyst
Solute
Predict the products for the this reaction:
K + HCl →
KCl + H2
KHCl
KH + Cl2
KCl + H
CH3CH2CH3
CH3CHPtCH3
CH3CH2CH2Pt
CH3CHPtCH2Pt
CH3CH(OH)CH2Br
CH3CHBrCH2OH
CH3CHBrCH3
CH3CH2CH2Br
CH3CHBrCH2Br
Identify the product for this reaction.
CH3CH(OH)CH2OH
CH3CH(OH)CH3
CH3CH2CH2OH
CH3CHMnCH2OH
CH3CH(OH)CH2Mn
12. What element is generally used in common bleaches in household products?
Chlorine
Benzene
Sodium
Iron
Write a balanced equation for this DR reactions [Fe has a charge of 3+ and NO3 has a charged of 1-]
NaOH + Fe(NO3)3 →
NaFe + OH(NO3)3
2NaNO3 + 3Fe(OH)3
NaNO3 + FeOH
3NaNO3 + Fe(OH)3
Write a balanced reaction for this reaction
Zn(s) + H2S(aq) →
ZnS + H
ZnS + H2
ZnS2 + H
Zn2S + H2
Identify the product for this reaction.
CH3CH(OH)CH3
CH3CH2CH2OH
CH3CH(OH)CH2OH
CH3CH2CH3
The following molecules have polar covalent compounds EXCEPT?
BCl3
CS2
HBr
NH3
From the given Lewis structure of NH3, how many nonbonding pairs of electron are around the central atom.
0
1
2
3
The following are examples of viscous substances EXCEPT
Blood
Honey
Syrup
Vinegar
Which of the following is TRUE about nonpolar molecules.?
Have high boiling point
Have high melting point
Have low surface tension
Have low vapor pressure
The following are intermolecular forces of attraction EXCEPT.
Covalent Bond
Dipole Dipole
HBond
London Dispersion
What is true about IMF?
Substances can form more than 1 but 1 will predominate.
They are Strong bonds that form between atoms of molecules.
They are stronger than the Intramolecular forces between atoms.
There is vague relationship between intermolecular forces and bulk properties.
Which of the following does not belong to the classification of Lipids.
Hemoglobin
Phospholipids
steroid
triglyceride
Intermolecular forces of attraction are forces of attraction or repulsion that act between atoms, molecules, or ions. What type of IMF interaction results from dissolving sodium chloride in water?
Dipole -Dipole
Ion-Dipole
Hydrogen bond
London Dispersion
When does a star become unstable?
When it runs out of fuel.
When it contracts and expands
When its core is converted to iron.
When the outer shell of star is pulled by the gravity from the center.
What are the atoms that make up the Carbohydrates?
C&H
C,H&O
C,H, &N
C,H,O,& N
It deals with the processes that involve the rearrangement of the molecular or ionic structure of a substance to form a new substance or products.
Chemical equilibrium
Chemical symbol
Chemical reaction
Stoichiometry
In the equation Mg+ HCL--> Mg Cl2 + H2,how many molecules of hydrogen do we need to make hydrogen balanced? a.3 b 6 c2 d7
In using cleaning products, one must remember some precautionary measures. Choose the best answer.
A &B
B
read the instruction carefully before using the products
wear appropriate protective equipment when using the product.
in order to attain a better and healthy living, one must practice proper hygiene and one of them is handwashing. What will you use to perform good handwashing?
Bacterial soap
detergent
dishwashing liquid
wax
Aside from the active ingredients, there are also other ingredients included in cleaning agents. This ingredient helps in keeping the minerals out of way of the surfactants.
Builders
Fragrance
pH Adjusters
Solvents
Many people feel bubbles showing that a product is working. What is the ingredients that create suds in a cleaning agent?
dye
foam enhancer
pH adjuster
preservatives
