When HCl reacts with manganese dioxide what does it evolve chlorine gas?
Answer: When concentrated hydrochloric acid(HCl) reacts with manganese dioxide, chlorine gas, manganese(II) chloride and water are liberated. So chlorine gas... View Article
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Give an example of the specie that has a linear shape.
Answer: NO2+ has linear shape, due to sp hybrid state of N. Determination of linear shape of molecule Molecular shapes... View Article
Which one of the following is 1-bromo-3-methyl butane? (1) (CH3)2CHCH2CH2Br (2) (CH3)2C(Br)CH2CH3 (3) (CH3)2CHCH(Br)CH3 (4) CH3(CH2)5Br
Answer: (1) (CH3)2CHCH2CH2Br The structure of 1-bromo-3-methyl butane is (CH3)2CHCH2CH2Br. UPAC Nomenclature According to the Guidelines set by IUPAC, the nomenclature... View Article
Which of these is responsible for exophthalmic goitre?
Answer: Over secretion of thyroxin leads to symptoms that include fast heartbeat, rapid breathing as well as a protrusion of... View Article
Which light range is most effective in photosynthesis?
Answer: Red light is more effective in photosynthesis because both the photosystems (PS I and PS II) absorb light of... View Article
Which law gives quantitative measurement of the force?
Answer: Newton’s second law of motion gives the quantitative measurement of force. Newton’s Second Law of Motion Newton’s second law... View Article
What is the oxidation number of oxygen in superoxides?
Answer: The oxidation number of oxygen in superoxides is -1/2 i.e. O-1/2. Oxidation number Oxidation number of an atom is... View Article
Name the instrument used for measuring blood pressure.
Answer: Sphygmomanometer is used for measuring blood pressure. Sphygmomanometer A sphygmomanometer also known as a blood pressure metre, blood pressure... View Article
When does diffusion of substances inside a cell occur?
Answer: Diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration down... View Article
What does the sounds lubb-dup mean in a cardiac cycle?
Answer: The period between the end of one heartbeat to the end of the next heartbeat is called a cardiac... View Article
What is the bond energy of covalent O-H bond in water ?
Answer: Bond energy is a quantity that offers insight into the strength of a chemical bond. A weak electrostatic force... View Article
What is the symbol used to represent Avogadro’s number.
Answer: Avogadro’s number is represented by the symbol NA. Avogadro’s number Avogadro’s number is a proportion that relates molar mass on an... View Article
What is the chemical formula for manganese (IV) sulfate?
Answer: Mn(SO4)2 is the chemical formula of manganese (IV) sulfate. Name Manganese(IV) Sulfate Formula Mn(SO4)2 Molar Mass 247.0632
What product is formed on disproportionation of H3PO3?
Answer: The reactions in which a single reactant is oxidized and reduced is known as Disproporionation reactions. The disproportionation reaction... View Article
Express Mass of 6.022 x 1022 molecules of CO2 in grams.
Given that Number of molecules = 6.02 X 1023 molecules We know that 6.02 X 1023 molecules equals 1 mole.... View Article
What is the IUPAC name of the compound C6H5O(CH2)6CH3?
Answer: The IUPAC name of the compound C6H5O(CH2)6CH3 is 1-phenoxy heptane. Rules Of Nomenclature As per the Guidelines set by... View Article
How many significant figures there are in 3.1205?
Answer: The number of significant figures in 3.1205 are 5. Significant figures The significant figures of a given number are... View Article
Which was the first national park established in India?
Answer: Jim Corbett National Park was established in 1936, and it was named Hailey National Park after its founder Sir... View Article
Which crop is associated with the process of Withering?
Answer: Tea is associated with the process of Withering. What is withering? It plays a role in the manufacture of black... View Article
Where is the national sugar institute of India located?
Answer: The national sugar institute of India is located in Kalyanpur. Kalyanpur Kalyanpur, also known as Kalianpur, is a town... View Article
