Answer: Figures having the same size and shape are known as congruent shapes. Congruence is a term used to describe the relationship between... View Article
Answer: The principal quantum number for the second period is 2. Principal quantum numbers are denoted by the symbol ‘n’. They designate the... View Article
Answer: Vapour pressure decreases with increase in polarity of liquid molecules. Vapour pressure is defined as a measure of the tendency of a... View Article
Valence is the number of electrons an atom must lose or gain to attain the nearest noble gas or inert gas electronic configuration. valence... View Article
Answer: The sex-determining mechanism in humans is the XY type. Humans contain 23 pairs of chromosomes. 22 pairs of chromosomes are the same in... View Article
The chloroplast is an organelle, having chlorophyll pigments in them. These pigments trap light energy to support photosynthetic reaction.... View Article
Answer: Compounds are chemical substances made up of two or more elements that are chemically bound together in a fixed ratio. Compounds can be... View Article
Answer: Bile contains pigments, bilirubin and biliverdin produced by the breakdown of dead and worn out red blood cells. The bile ducts are... View Article
Answer: Leaves, fruits, and flowers are the regions where the parenchyma tissue is present. Parenchyma is found in soft plant parts, including... View Article
Answer: Paramagnetic materials have some unpaired electrons due to these unpaired electrons the net magnetic moment of all electrons in an atom... View Article
Answer: Tranquillizers are substances used for the treatment of mental diseases. Tranquillizers are a medicinal drug that helps in reducing... View Article
Answer:Â Oxidation number of NO3- is +5. Oxidation number of nitrate ion can be calculated as follows, Let X be the oxidation number of N X +... View Article
Answer: The pseudocoelomate animals, showing false coelom are included in phylum Nematoda. True coelom is not present. The blastocoel is... View Article
Answer: Eka aluminium predicted by Mendeleev is Gallium. Eka-aluminum and gallium are two names for the same element, as Eka-Aluminium has... View Article
Answer: Burning of a candle is a chemical as well as physical change as it involves change in both chemical and physical properties. Everything... View Article
Answer: Steam produces more severe burns than boiling water. We know that in both boiling water and steam, the temperature is around 100-degree... View Article
The solid portion of the Earth's surface called Lithosphere. Let u know more about the lithosphere layer. The outermost part of the Earth which... View Article
Answer: In 2Na(S) + Cl2 → 2 NaCl (S): The oxidising agent is chlorine. According to the new concept, loss of electrons is oxidation and the... View Article