Questions
- 1801. What are significant figures?
- 1802. What is dimensional analysis?
- 1803. What is accuracy and precision?
- 1804. What are SI units?
- 1805. What are enzymes?
- 1806. How do catalysts work?
- 1807. What is a catalyst?
- 1808. What factors affect the rate of reaction?
- 1809. What is the rate of reaction?
- 1810. Why do reactions release or absorb energy?
- 1811. What is enthalpy?
- 1812. What is activation energy?
- 1813. What is endothermic reaction?
- 1814. What is exothermic reaction?
- 1815. What is neutralization?
- 1816. What are strong and weak acids?
- 1817. What is the pH scale?
- 1818. What are salts?
- 1819. What are bases?
- 1820. What are acids?
- 1821. What is filtration?
- 1822. What is chromatography?
- 1823. What is distillation?
- 1824. What are common separation techniques used in chemistry?
- 1825. What are colloids?
- 1826. What are saturated and unsaturated solutions?
- 1827. What is solubility?
- 1828. What is a solution?
- 1829. What is the Ideal Gas Equation?
- 1830. What is Charles’s Law?
- 1831. What is Boyle’s Law?
- 1832. What is pressure in gases?
- 1833. What is diffusion?
- 1834. What are the properties of gases?
- 1835. What are the properties of liquids?
- 1836. What are the properties of solids?
- 1837. What is theoretical and actual yield?
- 1838. What is limiting reagent?
- 1839. What is stoichiometry?
- 1840. What are different types of chemical reactions?
- 1841. Why must chemical equations be balanced?
- 1842. What is a chemical equation?
- 1843. What is a chemical reaction?
- 1844. What are metals, non-metals, and metalloids?
- 1845. What are periodic trends in electronegativity?
- 1846. What are periodic trends in ionization energy?
- 1847. What are periodic trends in atomic size?
- 1848. What are groups and periods in the periodic table?
- 1849. What is periodicity?
- 1850. Who created the modern periodic table?
- 1851. What is hydrogen bonding?
- 1852. What is polarity of molecules?
- 1853. What is electronegativity?
- 1854. What is a metallic bond?
- 1855. What is a covalent bond?
- 1856. What is an ionic bond?
- 1857. What is a chemical bond?
- 1858. What is percentage composition?
- 1859. What is molarity and molality?
- 1860. How do you convert moles to number of particles?
- 1861. What is molar mass?
- 1862. What is Avogadro’s number?
- 1863. What is a mole?
- 1864. What is the difference between empirical and molecular formulas?
- 1865. How is valency used to write chemical formulas?
- 1866. What is valency?
- 1867. What are chemical formulas?
- 1868. What are chemical symbols?
- 1869. What are shells and subshells?
- 1870. What is electronic configuration?
- 1871. What are orbitals?
- 1872. Describe Bohr’s model of the atom.
- 1873. What is an atomic model?
- 1874. What are isotopes and isobars?
- 1875. What is a mass number?
- 1876. What is an atomic number?
- 1877. What are the three fundamental particles of an atom?
- 1878. What is the Law of Multiple Proportion?
- 1879. What is the Law of Constant Proportion?
- 1880. What modifications were made to Dalton’s atomic theory?
- 1881. What is Dalton’s Atomic Theory?
- 1882. State the Law of Conservation of Mass.
- 1883. What are physical and chemical changes? Give examples.
- 1884. What is the difference between physical and chemical properties of matter?
- 1885. What are homogeneous and heterogeneous mixtures?
- 1886. What is the difference between elements, compounds, and mixtures?
- 1887. How is matter classified into solid, liquid, and gas?
- 1888. What is matter?
- 1889. How does chemistry contribute to medicine and healthcare?
- 1890. What is the difference between pure chemistry and applied chemistry?
- 1891. What are the different branches of chemistry?
- 1892. Why is chemistry important in our daily life?
- 1893. What is chemistry and what is its scope?
- 1894. What are the main applications of modern physics in daily life?
- 1895. What is quantum mechanics used for in electronics?
- 1896. What is band theory of solids?
- 1897. What is covalent bond in quantum terms?
- 1898. What is molecular bonding?
- 1899. What is magnetic moment of an electron?
- 1900. What is spin?