Diurnal range of temperature is
Diurnal range of temperature is the difference between the maximum and minimum temperatures of the same day.
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Brass is an alloy of _____ and _____ metals which shows significant ductility.
(a) Cu and Zn(b) Pb and Sn(c) Zn and Pb(d) Sn and CuCorrect answer: (a) Cu and ZnBrass is an... View Article
State effective atomic number(EAN) rule.
Effective atomic number (EAN) in a complex is defined as the total number of electrons present around the central metal... View Article
Write the balanced chemical equation for the following word equation.
Ammonia + oxygen = nitric oxide + water The chemical equation for the above word equation can be written as:... View Article
Which one of the following is a secondary alcohol?
(a) 2-methyl-2-propanol(b) 1-propanol(c) 1-butanol(d) 2-pentanolCorrect answer: (d) 2-pentanolThe secondary alcohol is 2-pentanol, i.e. propan-2-ol.
Formation of manure from leaves is a physical change. State whether the statement is True or False? Justify your answer.
Formation of manure from leaves is a physical change.The above statement is false since the formation of manure from leaves... View Article
Name the source from which litmus solution is obtained. What is the use of this solution?
Answer: The litmus solution is obtained from lichens. Litmus solution is generally a purple dye. The Litmus solution is used... View Article
The first metal used by man was
Copper was first metal used by man over 10,000 years ago.
How would you convert Aniline to Chlorobenzene?
The process of conversion of Aniline to Chlorobenzene happens in two steps: Step 1: Sodium nitrite and hydrochloric acid is added... View Article
Which of the following is an example of absorption? a) Water on silica gel b) Water on calcium chloride c) Hydrogen on finely divided nickel d) Oxygen on metal surface
Answer: (b) Water on calcium chloride This is because when water is spread over calcium chloride, water gets penetrate into... View Article
276 g of silver carbonate on being strongly heated yield
Silver carbonate on being strongly heated yield into elemental silver liberating mixture of carbon dioxide and oxygen gas. So, 276... View Article
Write any four properties of material.
Four properties of material are:1. Hardness2. Malleability3. Ductility4. Good conductor of heat and electricity
Fluids are ____.
(a) liquids (b) gases (c) both (a) and (b) (d) none of theseCorrect answer: (c) both (a) and (b)Fluids are... View Article
List top 5 electropositive elements.
The most electropositive element in the periodic table is Caesium (Cs). The list of top five electropositive elements is given... View Article
Why gases are highly compressible?
Gases are highly compressible to large vacant spaces between the molecules of a gas. As a result, its intermolecular force... View Article
Structural formula of benzene is
Benzene is one of the most commonly known aromatic compounds. Structural formula of benzene is C6H6.
Which of the following is the lightest metal
Which of the following metals is the lightest in the periodic table of elements?(a) Lithium(b) Aluminium(c) titanium(d) MagnesiumSolution: (a) Lithium
The freezing point of water in kelvin scale is
The freezing point of water on the kelvin scale is 273.2 K Freezing point Freezing point, where a liquid becomes... View Article
Draw the lewis electron dot structure for oxygen molecule
A Lewis electron dot structure describes the bonding atoms, the number of bonds in the molecule, and the lone pairs... View Article
A solution containing 10g per dm3 of urea is isotonic with a 5% solution of non volatile solute. Calculate the molecular mass of this non-volatile solute.
The molecular mass of non-volatile solute is 300gmol-1.
