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WorksheetsChemistry
Total questions: 25
Worksheet time: 13mins
How is a mixture different from a compound?
Components of a mixture can only be separated chemically.
Particles of a mixture are combined chemically.
Components of a mixture can be separated by physical means.
The composition of a mixture may be constant.
Which of the following decreases the rate of reactions?
Heterogeneous catalyst
Catalytic promoters
Homogeneous catalyst
Catalytic poison
Which one of the following is not radioactive?
Tritium
Francium
Astatine
Zirconium
Which ion has the highest magnetic moment?
Cr+4
V+2
Fe+3
Sc+3
The energy of an electron in an orbit was calculated by?
John Dalton
Neils Bohr
Rutherford
J.J. Thomson
Which gas is used in filling electric bulb?
Radon
Neon
Krypton
Argon
Materials that are weakly attracted to magnets, are called:
(a)
What is the process of losing water of crystallization from a hydrated salt when exposed to air called?
Dehydration
Hydration
Hardening
Efflorescence
Which one of the following is the heaviest?
1 mole of water molecules
1 mole of sodium atoms
1 mole of hydrogen molecules
1 mole of ammonia molecules
Which of the following is the chemical formula for calcium nitrate?
CaNO3
CaNO4
Ca(NO3)2
Ca(NO2)3
The existence of of a substance in more than one solid modification is known as?
Isomorphism
Polymorphism
Amorphism
Allotropy
A cathode and an anode are the most common components of an electrochemical cell. Which of the following claims about the cathode is correct?
l
Is usually made up of insulating materia
Electrons move into the cathode
Oxidation occurs at the cathode
Usually denoted by a negative sign
To get carboxylic acids directly from alcohol, which of the following oxidising agents is used?
Acidified KMnO4
Anhydrous CrO3
Alkaline KMnO4
Aqueous KMnO4
Which of the reactions below can result in ketones?
Dehydrogenation of primary alcohols
Dehydrogenation of tertiary alcohols
Oxidation of secondary alcohols
Oxidation of primary alcohols
Which of the following compounds is formed when benzyl alcohol is oxidised with KMnO4?
CO2 and H2O
Benzoic acid
Benzaldehyde
Benzophenone
The term homogenous mixtures signifies that
its properties are uniform throughout the mixture.
its composition is uniform throughout the mixture.
neither composition nor properties are uniform throughout the mixture.
both composition and properties are uniform throughout the mixture
A plant cell shrinks when it is kept in a
hypertonic solution
isotonic solution
pure waterAnswer
hypotonic solution
The Italian chemist, Amedeo Avogadro, concluded that at the same temperature and pressure
equal volumes of different gases contain the same number of moles
different volumes of different gases contain the same number of moles
equal volumes of different gases contain a different number of moles
Non of the above
Hydrocarbons with only single covalent bonds are known as
ethane
alkanes
alkenes
ethene
What is the volume of 1.00 mole of any gas at STP?
22.4 L
6.02 × 10 23 L
2.24L
2.24 × 10 23 L
Glycerol is a by-product of Saponification:
True
False
Which is the chimical formula for Caustic Potash?
NaOH
NaCl
H2 SO4
KOH
Graphite, and Diamond are......of Carbon?
Isotopes
Allotropes
Isomers
Crystals
Which of the following is most soluble in water?
MgSO4
BaSO4
H2SO4
CaSO4
How many moles are there in 22.2 gm of Calcium chloride?
2moles
4moles
0.4moles
0.2moles
