Answer: Exchange of gases takes place in the alveoli. Alveoli have thin and moist walls, which enable gaseous diffusion. Oxygen is transported... View Article
Answer: Sound waves is an example of a longitudinal wave. The vibrating motion of particles moving via a conductive medium generates a sound... View Article
Answer: The drying agent for chlorine gas is concentrated sulphuric acid. The absorption of residual water vapour in concentrated sulphuric... View Article
Answer: Epidermis is made up of stratified epithelium. Epidermis is made up of a thin layer of flat, thin and scale-like dead cells, which are... View Article
Answer: In BH3, B is sp2 hybridized. In BeH2, BeF2 and BeCl2, Be is sp hybridized. When two atomic orbitals combine to form a hybrid orbital... View Article
Answer: The formula of iron (III) sulphate is Fe2(SO4)3. Iron (III) Sulfate has yellow colour and is water-soluble. It can be found in a range... View Article
Answer: Blacking coating on silver is due to the formation of silver sulphide (Ag2S). When silver is exposed to air, it combines with the... View Article
Answer: Methylated spirit is used to dissolve chlorophyll. Since chlorophyll is soluble in organic solvents including ethanol, the leaf is... View Article
Answer: Housefly has mouth parts that help in sucking. The housefly refers to the Diptera family. Chemo sensilla are receptors on the tarsi of... View Article
Answer: Complete alimentary canal is found in ascaris. Ascaris are nematode roundworms that reside like parasites in a human being’s small... View Article
Answer: The pitch of a sound is the response of our ear which gives to the sound frequency. Pitch of sound depends on the frequency of vibration... View Article
Answer: The Strength of an acid increases with the increase in H+ ions. The sour taste is the most common characteristic of acid. An acid is a... View Article
Answer: Mixed farming ensures a steady income to the farmers. Growing two or more crops on the same area of land is known as mixed cropping.... View Article
Answer: Lion, cat and tiger belong to a common family. The lion is a member of the Felidae family, which is a big cat family. However, lions... View Article
Answer: The human skeleton consists of 206 bones. The skeletal system protects the body and offers a structural framework. An adult human is... View Article
Answer: Since decomposition of silver chloride takes place in the presence of sunlight, so it is a photolytic decomposition reaction. A... View Article
Answer: Parenchymatous cells performing photosynthesis are called Chlorenchyma as they contain chloroplast in them. Parenchyma is the most... View Article
Solution: Acetone, petrol, perfume etc., being volatile, evaporate very fast when exposed to larger surfaces. When we put some acetone or petrol... View Article
Answer: Mendeleev's classification was based on increasing atomic masses. Elements were arranged in Mendeleev's periodic table according to... View Article