Practice Chemistry Questions and Answers

• Which of the following elements is a noble gas?
• The process of conversion of a solid directly into a gas is known as:
• The chemical name of 'baking soda' is:
• Which gas is most abundant in the Earth's atmosphere?
• Pepperonil, ethyl acetate, butyraldehyde and nitrate are some common adulterants used in ____________
• Which element is known as the 'King of Chemicals.
• Which gas is most abundant in the Earth's atmosphere.
• What is the boiling point of water at sea level.
• Which of the following elements has the highest electronegativity.
• Aqua regia, which can dissolve gold, is a freshly prepared mixture of concentrated hydrochloric acid and concentrated ______.
• The slow corrosion of iron in the presence of moist air is known as:
• Oil and water can form a stable dispersion with the help of a substance commonly called a(n):
• The combining power of an element is called its:
• Ultra-purification of metals is achieved using:
• The pH value of an acidic solution is:
• ______ is defined as the number of moles of solute per litre of solution.
• Which of the following is NOT a physical change?
• Which fossil fuel is formed under earth by the decomposition of vegetable matter lying under water by anaerobic bacteria in the absence of oxygen?
• Which device converts sound waves to electrical signals?
• When acid reacts with metal carbonate, _______ is/are formed.
• The green colour of the leaves is due to-
• The IUPAC name of the compound CH₃ -CH₂ -CH₃ is-
• Which of the following colour of white light has the maximum wavelength?
• What is the physical state of water at 250⁰ C?
• The elements with atomic numbers 10, 18, 36, 54 are-
• What is the molecular formula of chloroform?
• A substance X turns the colour of red litmus blue, and it will change methyl orange-
• Which of the following is a non-metal?
• Which of the following statements about the modern periodic table is NOT correct?
• Which of the following pollutants is the major contributor to photochemical smog?
• What is the chemical name of quick lime?
• Which of the following fatty acids does NOT form soap?
• What are antibiotics?
• Which of the following is acidic in nature?
• Which substance is present in green leaves to help in the process of photosynthesis?
• _____________ has the maximum attraction force between the molecules.
• Based on the periodic trends for ionization energy, which element has the highest ionization energy?
• Which of the following is polyatomic?
• What is the colour of base?
• Repetition of sound produced by reflection of sound waves is called-