Set of Chemistry for CEE-1

Posted by Nepal Quiz

الجمعة، 27 ديسمبر 2024

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Set of Chemistry for CEE-1

The atomic number of an element is determined by the number of:
a) Electrons
b) Protons
c) Neutrons
d) Isotopes
Which of the following is an example of an exothermic reaction?
a) Dissolving salt in water
b) Photosynthesis
c) Combustion of methane
d) Melting of ice
The molar mass of NaCl (sodium chloride) is:
a) 58.5 g/mol
b) 36.5 g/mol
c) 74.5 g/mol
d) 84.5 g/mol
What is the oxidation state of chlorine in NaClO3?
a) +1
b) +3
c) +5
d) -1
The chemical formula for methane is:
a) C2H6
b) CH4
c) C3H8
d) C4H10
Which of the following elements is in the same group as chlorine in the periodic table?
a) Sodium
b) Oxygen
c) Bromine
d) Nitrogen
Which of the following compounds is ionic?
a) H2O
b) CO2
c) NaCl
d) CH4
The law of constant proportion is also known as:
a) Avogadro’s law
b) Dalton’s law
c) Law of definite composition
d) Boyle’s law
The most abundant element in the Earth's crust is:
a) Oxygen
b) Silicon
c) Aluminum
d) Iron
Which of the following is a strong acid?
a) H2CO3
b) HCl
c) CH3COOH
d) HNO3
The pH of a neutral solution at 25°C is:
a) 1
b) 7
c) 10
d) 14
In a redox reaction, the species that gains electrons is called:
a) Oxidizing agent
b) Reducing agent
c) Anode
d) Cathode
What is the empirical formula of C6H12O6?
a) C6H12O6
b) C3H6O3
c) CH2O
d) C2H4O2
The hybridization of the central atom in CO2 is:
a) sp
b) sp2
c) sp3
d) sp3d
Which of the following elements has the smallest atomic radius?
a) Na
b) Mg
c) Al
d) Cl
The number of valence electrons in an oxygen atom is:
a) 6
b) 8
c) 2
d) 4
Which of the following gases has the highest molecular weight?
a) H2
b) O2
c) N2
d) CO2
Which of the following is a property of ionic compounds?
a) They are poor conductors of electricity in solid form.
b) They have low melting and boiling points.
c) They are good conductors of electricity in solid form.
d) They are soluble in nonpolar solvents.
Which of the following is an example of an allotrope of carbon?
a) Ozone
b) Diamond
c) Sodium chloride
d) Methane
Which gas is evolved when an acid reacts with a metal?
a) Nitrogen
b) Hydrogen
c) Oxygen
d) Carbon dioxide
The reaction between an acid and a base is called:
a) Redox reaction
b) Precipitation reaction
c) Neutralization reaction
d) Displacement reaction
The atomic mass unit (amu) is defined as:
a) One-half the mass of a carbon-12 atom
b) The mass of one proton
c) The mass of one neutron
d) The mass of one electron
Which of the following gases is least soluble in water?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Ammonia
The reaction of an alkene with bromine is an example of:
a) Substitution
b) Addition
c) Elimination
d) Polymerization
Which of the following is a characteristic of an exothermic reaction?
a) Absorption of heat
b) Formation of bonds
c) Release of energy
d) Decrease in temperature
Which of the following is true about the electron in an atom?
a) It is located in the nucleus
b) It has a positive charge
c) It has a negligible mass
d) It has the same mass as a proton
Which of the following ions has the smallest radius?
a) Na+
b) Mg2+
c) Al3+
d) K+
What is the chemical name of NaOH?
a) Sodium chloride
b) Sodium hydroxide
c) Sodium oxide
d) Sodium bicarbonate
The most stable ion of oxygen is: a) O+
b) O2-
c) O-
d) O2+
Which of the following is an example of a Lewis acid? a) NH3
b) CO2
c) NaCl
d) CH4
Which of the following gases is most commonly used in electric bulbs? a) Neon
b) Argon
c) Nitrogen
d) Oxygen
The heat required to change the temperature of 1 gram of a substance by 1°C is called: a) Latent heat
b) Specific heat capacity
c) Enthalpy
d) Heat of fusion
The relationship between volume and temperature in Charles's law is: a) Direct
b) Inverse
c) No relation
d) Direct square
What is the main component of natural gas? a) Methane
b) Ethane
c) Propane
d) Butane
Which of the following is an example of a heterogeneous mixture? a) Air
b) Saltwater
c) Oil and water
d) Vinegar
The pH of a solution is a measure of the concentration of: a) Hydroxide ions
b) Hydrogen ions
c) Sodium ions
d) Chloride ions
Which of the following is an acid-base indicator? a) Water
b) Methyl orange
c) Sodium chloride
d) Ammonium chloride
The process by which a liquid turns into a gas at a temperature below its boiling point is known as: a) Evaporation
b) Sublimation
c) Condensation
d) Freezing
Which of the following is the correct IUPAC name for CH3-CH2-COOH? a) Acetic acid
b) Butanoic acid
c) Propanoic acid
d) Methanoic acid
The number of moles of solute in 1 liter of a 1 M solution is: a) 1 mole
b) 0.1 mole
c) 10 moles
d) 0.01 mole
What is the molecular geometry of methane (CH4)? a) Tetrahedral
b) Linear
c) Bent
d) Trigonal planar
Which of the following elements forms an acidic oxide? a) Sodium
b) Calcium
c) Oxygen
d) Magnesium
Which is the least reactive halogen? a) Fluorine
b) Chlorine
c) Bromine
d) Iodine
Which of the following compounds contains a coordinate covalent bond? a) NH3
b) H2O
c) CO2
d) NH4+
Which of the following is not a characteristic of metals? a) Good conductor of electricity
b) Malleable
c) Dull in appearance
d) High melting point
Which of the following elements has the highest ionization energy? a) Sodium
b) Magnesium
c) Chlorine
d) Oxygen
In a covalent bond, the electrons are: a) Transferred from one atom to another
b) Shared between two atoms
c) Lost by both atoms
d) Gained by both atoms
Which of the following is a reducing agent?
a) O2
b) H2O
c) Na
d) Cl2
Which of the following is the correct formula for sulfur hexafluoride?
a) SF2
b) SF4
c) SF6
d) S2F6
The principle behind the law of conservation of mass states that:
a) Mass can be created in chemical reactions.
b) Mass can be destroyed in chemical reactions.
c) Mass is constant and neither created nor destroyed in chemical reactions.
d) Mass is converted into energy in chemical reactions.