NSMQ 2024 Chemistry True/False
Review past NSMQ 2024 Chemistry True/False round questions with detailed answers and comprehensive explanations
Greenhouse gases strongly absorb and emit ultraviolet radiations, contributing to the greenhouse effect and global warmi…
At high altitudes, atmospheric pressure is low and water boils at a temperature higher than 100°C.
The given postulates of Dalton's atomic theory has limitations.
In the solid state, non metals are generally brittle and have higher density than metals.
The boiling point of a liquid is defined as a temperature at which its vapour pressure equals the external atmospheric p…
The reaction of sodium with water is slow at room temperature but can be vigorous upon heating.
The pOH of a solution is directly proportional to the concentration of hydroxide ions.
The rate of a zero-order reaction is independent of the concentration of the reactants.
During the electrolysis of brine,
A primary alcohol can be directly oxidized to a ketone.
Elements with high electronegativity typically have high electron affinity.
Carboxylic acids generally have higher boiling points than alcohols due to stronger hydrogen bonds.
The presence of double bonds in alkenes means all alkenes exhibit geometric isomerism.
Ground level ozone is beneficial for human health, as it absorbs UV radiation.
Under normal circumstances, alkanes can be converted into alcohols via oxidation reactions.
An oxidizing agent always gains electrons during a chemical reaction, and it is reduced.
Lithium and manganese are commonly extracted from their ores using electrolysis.
Crude oil is separated into different fractions based on boiling points.
Steel is a compound of iron and carbon.
Alkali metals have low melting and boiling points compared to most other metals.
The ionic radius of Mg²⁺ is larger than that of Na⁺.
Based on the IUPAC system of naming, the given is incorrect.
Iron reacts readily with water at room temperature to form iron hydroxides and hydrogen gas.
The equilibrium constant of a reversible reaction always increases with temperature.
According to Rutherford’s model of the atom, …
Cyclopropane is less stable than cyclobutane.
Electron affinity of all noble gases is negative because they have a stable electron configuration and do not easily gai…
Compounds with the same mass cannot be distinguished from each other in a mass spectrometer.
The rate of a reaction is directly proportional to the number of collisions.
2-methyl-1-butanol is a primary alcohol.
The effective nuclear charge experienced by an electron in an atom is always equal to the actual nuclear charge.
In exothermic reactions, heat is a reactant and flows out from the system into the surroundings.
According to Thomson’s model, electrons move around the nucleus in fixed orbits.
Free radical halogenation reactions are highly selective and favour the formation of primary alkyl halides.
The position of an element on the periodic table is primarily determined by the number of electrons present in an atom o…
Collision frequency always increases with temperature irrespective of reactant state.
In the hydrogen atom, the angular momentum quantum number is always smaller than the principal quantum number.
Seawater is a heterogeneous mixture.
For a sample of a radioisotope, the rate of decay is constant over time.
All compounds contain at least two different elements combined in a fixed ratio.
The reactivity of an element depends solely on the number of electrons it possesses.
In potassium permanganate, manganese has an oxidation state of +6.
The solubility of sparingly soluble salts generally increases with pressure.
The reaction of chlorine with water is exothermic.
Nuclides with the same number of protons but different number of neutrons are isotopes.
The reduction of propyne with hydrogen gas over a palladium catalyst yields propane.
According to Dalton's atomic theory, compounds are formed when atoms of an element combine in fixed, simple, whole numbe…
Cyclopropane is the simplest cyclic hydrocarbon.
According to Graham's law, the rate of diffusion of two gases with equal molar masses will always be the same.
The sum of pH and pOH of a solution at 25°C is always equal to 14.
The standard hydrogen electrode consists of a platinum electrode immersed in 1.00 mol/dm³ solution of H+ ions saturated …
The boiling point of 3-methylpentane is higher than that of 2,3-dimethylbutane.
Zinc metal and hydrochloric acid react to produce hydrogen gas in an endothermic process.
Based on Boyle's law, if the volume of a gas is decreased, its pressure will increase proportionally, assuming temperatu…
The pH of a solution containing an acidic salt is always less than 7.
If the emf of a redox reaction is zero, the reaction is at equilibrium and no net reaction occurs under standard conditi…
In redox titrations, no indicator is required as the reagents are usually colored.
A buffer solution is formed when the partial neutralization of an acid occurs to form its salt or conjugate base.
All the carbon-carbon bonds in benzene are of equal length.
The thermal decomposition of sodium carbonate generally produces sodium oxide and carbon monoxide at reduced temperature…
Ammonia gas is lighter than water and can be collected by downward displacement of water.
The heat of combustion of alkanes generally increases linearly with the number of carbon atoms.
Heat capacity measures the amount of heat required to raise the temperature of one unit of mass of a substance by one de…
A salt formed from the reaction of a weak acid and a weak base will always produce a neutral solution upon hydrolysis.
The enthalpy of atomization of a molecule is always positive.
The presence of a common ion in solution always decreases the solubility of a sparingly soluble salt.
Triglycerides undergo acidic hydrolysis to produce free fatty acids and glycerol.
During protein synthesis, the carboxyl group of one amino acid reacts with the amino group of another amino acid to form…
The Benedict's test can be used to detect both monosaccharides and disaccharides containing free aldehyde or free ketone…
In a multi-step reaction, the rate-determining step is always associated with the highest energy transition state, irres…
Starch is a polysaccharide made up of only glucose units linked primarily by alpha and beta glycosidic bonds and is used…
For an element in its standard state, the enthalpy of combustion is zero.
