Why is hydrogen a gas at room temp? It is so because, the molecules of HCl are bonded to one another by weak hydrogen bonding. Because of the weak hydrogen bonding the molecules are not close enough to maintain the liquid state of matter. Hence, they are gas at room temperature. How do you store […]
What are mistakes in DNA replication called?
What are mistakes in DNA replication called? Mutations. Diagram of a DNA molecule looking like a twisted ladder. When there is a mistake in the copying of the genetic message that is permanent, a mutation has occurred. UV light can cause mutations, as the DNA molecules are good absorbers of UV. What happens if DNA […]
In which state of matter are the intermolecular forces the weakest?
In which state of matter are the intermolecular forces the weakest? gases What is the strongest intermolecular force of attraction? Dipole-dipole interactions Is hydrogen bonding stronger than London dispersion force? Dipole-dipole forces are stronger than London forces in small molecules. In larger molecules, London forces tend to be stronger than dipole-dipole forces (even stronger than […]
What happens when acid is added to Onion?
What happens when acid is added to Onion? Olfactory Indicators: Substances which change their smell when mixed with acid or base are known as olfactory indicators. Onion: Paste or juice of onion loses its smell when added with base. It does not change its smell with acid. Is vanilla base or acid? Vanilla extract has […]
What do all pure substances have in common?
What do all pure substances have in common? Pure substances are mostly homogeneous in nature containing only one type of atoms or molecules. These substances mainly have a constant or uniform composition throughout. The substances have fixed boiling and melting points. A pure substance usually participates in a chemical reaction to form predictable products. Is […]
Is Aluminium a better conductor of electricity than sodium?
Is Aluminium a better conductor of electricity than sodium? They have metallic bonding , in which positive metal ions are attracted to delocalised electrons. Going from sodium to aluminium;the number of delocalised electrons increases which means there are more electrons which can move and carry charge and so the electrical conductivity increases. Why is Aluminium […]
Which of following is best insulator?
Which of following is best insulator? Plastic, rubber, wood, and ceramics are good insulators. These are often used to make kitchen utensils, such as saucepan handles, to stop heat from flowing up to burn the cook’s hand. Plastic coating is also used to cover most electrical wires in appliances. Air is also a good insulator […]
What is the Endomembrane system and what organelles does it consist of?
What is the Endomembrane system and what organelles does it consist of? These membranes divide the cell into functional and structural compartments, or organelles. In eukaryotes the organelles of the endomembrane system include: the nuclear membrane, the endoplasmic reticulum, the Golgi apparatus, lysosomes, vesicles, endosomes, and plasma (cell) membrane among others. What are the two […]
What is the most important factor when it comes to viscosity of liquids?
What is the most important factor when it comes to viscosity of liquids? Temperature has a major effect on viscosity; the viscosity decreasing significantly with increase in temperature. As the temperature increases the molecules in the liquid move about more, and therefore spend less time in contact with each other, thus the internal friction of […]
Which is not a cell organelle?
Which is not a cell organelle? Ribosomes. Ribosomes are the protein factories of the cell. Mitochondria. Discussed above shows the rest except fat droplet is not a Cell Organelle. Is microsomes a cell organelle? In cell biology, microsomes are heterogenous vesicle-like artifacts (~20-200 nm diameter) re-formed from pieces of the endoplasmic reticulum (ER) when eukaryotic […]