Text SolutionVerified by Experts In our day to day language 'pure' means something with no adulteration. A substance is said to be pure i.e., homogeneous when the composition doesn't change , no matter which part of the substance you take for examination. Show More ...
5 (a) State what is meant by the specific heat capacity of a substance.[2](b) A student carries out an experiment to find the specific heat capacity of aluminium. He uses an electric heater and a thermometer, inserted into separate holes in an aluminium block.The following dat a are ob...
4 (a)drug 1 medicine(AW) 1 chemical 1 substance ;produced by microorganisms ;A ref to idea of synthetic analogueskills 1 stops, growth of, bacteria 1 other microbes ;(b) (i) (most) were killed by the antibiotic ; ora(ii)(only) antibiotic-resistant bacteria transferred from B/ (onl...
When any substance is given heat, a temperature change is generally observed in that substance. If the substance takes heat, the temperature increases, and if the substance gives heat, the temperature decreases.Answer and Explanation: The increase or decreas...
Is water classified as a pure substance (element or compound) or a mixture? Explain. What is meant by a mixed-crystal formation? What is the major difference between a crystal and an amorphous solid? Describe how you would determine the melting point of a salt of...
practiced. Previous research suggests that survey items must be carefully piloted in order to minimise misunderstanding and that one effective approach may be the use of pictograms to unambiguously clarify what is meant by AI [44]. Using confidential interview methods would help reduce social-...
(a) State what is meant by the specific latent heat of fusion (melting) of a substance.[2] 相关知识点: 试题来源: 解析 (a) energy/heat needed to change state of substance/melt(from solid to liquid at constant temperature/ melting point) per kg/per unit mass ...
(a)Natural gas, which is mainly methane, is a fossil fuel.(i) What is meant by the term fuel?[1](ii) Name two other fossil fuels.[2](iii) Name a solid fuel which is not a fossil fuel.[1] 相关知识点: 试题来源: 解析 (a)(i) substance/ material/ compound/element/mixture (...
What is meant by set? Give examples. What is meant by the standard form of a fraction? What is meant spontaneous combustion? Give one example of spontaneous combustion. What is meant by spontaneous combustion? Give one example of a substance which shows spontaneous combustion. What is meant ...
: a substance obtained as a gelatinous mass or a fine powder by the partial hydrolysis of cellulose usually by means of acids.