For transportation of mercury, container made up of which material is used?
Mercury is a liquid that is transported in iron containers, as iron does not amalgamate with mercury. Only iron and... View Article
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How does the water kept in an earthen pot (matka) become cool during summer?
Vaporisation is the process that takes place in every part of the environment. Similarly, the vaporisation that helps water kept in... View Article
According to Dalton’s atomic theory, what will a chemical reactions involve?
Answer: According to Dalton’s atomic theory, chemical reactions involve the reorganization of atoms. Dalton’s atomic theory In 1808, the English... View Article
Which of the following acid is a weak acid? (1) CH3COOH (2) H2SO4 (3) HCl (4) HNO3
Answer: (1) CH3COOH CH3COOH → CH3COO– + H+ CH3COOH is a weak acid because it ionizes only partially in aqueous solution to form H+ and... View Article
How many electrons are transferred during following change?2I–(aq) → I2 (s)
Answer: Redox reactions are oxidation-reduction chemical reactions in which the reactants change their oxidation states. . It can be noted that... View Article
Name the phenomenon involved in tuning a radio set to a particular station
Resonance is defined as a phenomenon when the applied periodic force’s frequency is equal to the natural frequency of the... View Article
Can the process of melting of ice-cream be considered as a physical change?
The melting of ice cream is a physical change. Liquid ice-cream solidifies again on freezing without change in chemical properties.... View Article
What is the general outermost shell electronic configuration for Actinoids?
The general outermost shell electronic configuration for Actinoids is [Rn] 5f1-146d0-17s2. Actinoids or actinides are 15 consecutive chemical elements in... View Article
Name two safety measures commonly used in electric circuits and appliances.
Two safety measures commonly used in electric circuits and appliances are: Electric Fuse An electric fuse is connected in series.... View Article
Two fuse wires have ratings of 10A and 13A. Which wire has higher resistance?
10A wire has a higher resistance The resistance of a given length of flat fuse wire is inversely proportional to... View Article
What is the mass of: (a) 0.2 mole of oxygen atoms (b) 0.5 mole of water molecules
Solution: A mole is defined as the amount of a substance that contains exactly 6.02214076 X1023 elementary entities of the... View Article
Excess electrons in electron rich hydrides are present as ________
Electron rich hydrides have excess electrons that are present as lone pair. A pair of electrons occupying an orbital in an... View Article
Why is consuming food rich is carbohydrates and fats not a healthy practice?
Consuming food rich in carbohydrates and fats is not a healthy practice because it may lead to obesity. Importance and risks... View Article
What is the conversion of ammonia into nitrates through Nitrosomonas called?
Nitrosomonas convert ammonia into nitrates by a process called nitrification. It is performed in two steps – nitrite formation and... View Article
What is the difference in the electronegativities of interhalogen compounds?
The difference in the electronegativities of interhalogen compounds polarises the bond. Thus, due to polarity and weak bonding, interhalogen compounds... View Article
What would be the consequences of a deficiency of haemoglobin in our bodies?
Haemoglobin is the respiratory pigment that transports oxygen to the body cells for cellular respiration. Therefore, deficiency of haemoglobin in... View Article
Name the factors in Doppler effect on which the change in frequency depends.
Speeds of source and listener. What is the Doppler effect? The Doppler effect can be described as the effect produced... View Article
Find the focal length of a convex mirror whose radius of curvature is 32 cm.
The focal length of a spherical mirror is equal to half the radius of curvature of that mirror. The radius... View Article
The acceleration of an object is inversely proportional to _______
The acceleration of an object is inversely proportional to the mass of the object. Newton’s second law of motion can... View Article
If Z = 3, what would be the valency of the element? Also, name the element.
If Z = 3, i.e., atomic number is 3. Its electronic configuration is 2, 1, i.e. (Z = 3) = 1s2 2s1... View Article
