Which one of the following elements is most reactive? (a) Fluorine (b) Argon (c) Helium (d) Radon
Fluorine is the most reactive element among the given elements. Why is fluorine highly reactive? Fluorine is a chemical element... View Article
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Which of the following is not a mixture? (a) Milk and chocolate (b) Sulphur (c) Air (d) Brass
Sulphur is an element. Rest all comes under the mixture. Mixture A mixture is a substance that consists of two... View Article
You find your mass to be 42 kg on a weighing machine. Is your mass more or less than 42 kg?
Since the weighing machine measures the apparent weight, our true weight is more, i.e., more than 42 kg Why weighing... View Article
(a) Is every diameter of a circle also a chord? (b) Is every chord of a circle also a diameter?
A chord of a circle is a straight line segment whose endpoints both lie on a circular arc. When the chord passes through the centre of a... View Article
Which one of the following is not an agro-based industry? (a) Cement (b) Jute (c) Cotton (d) Sugar
(a) Cement is not an agro-based industry. Agro-based industries The agro-based industry includes industries related to textiles, sugar, paper and... View Article
Which among the following is a transition metal ? (a) Sodium (b) Potassium (c) Magnesium (d) Copper
Copper is a transition metal as its ion contains partially filled d-orbitals 1s22s22p63s23p63d9 4s2 Transition metal- Copper In the transition... View Article
Name the rule according to which addition reaction takes place in an unsymmetrical alkynes.
In the case of unsymmetrical alkynes, addition takes place according to the Markovnikov rule. When an unsymmetrical reagent adds to... View Article
The largest atomic radius among the following is of: (a) Helium (b) Carbon (c) Oxygen (d) Potassium
Atomic radii increase down the group and decrease throughout the period. So, K has the largest atomic radius among the... View Article
Which among the following is a non-reducing sugar? a) Lactose b) Maltose c) Sucrose d) Fructose
Answer: c) Sucrose Sucrose is a non-reducing sugar because the monosaccharides’ anomeric carbon is involved in glycoside or acetal formation. So... View Article
If you could use any source of energy for heating your food, which one would you use and why?
Natural gas can be used for heating and cooking food because it is a clean source of energy. It does... View Article
Write all the factors of the following numbers: (a) 24 (b) 15 (c) 21 (d) 27 (e) 12 (f) 20 (g) 18 (h) 23 (i) 36
A factor is a number that divides into another number exactly and without leaving a remainder. Most numbers have an even number of factors (a) 24 24 = 1 x 24... View Article
What can you as an individual do to reduce your consumption of the various natural resources?
Natural resources are the essential environment to humans, whether they in one form or the other. Natural resources are available... View Article
Which one of the following elements is a non-metal? a) Mercury b) Phosphorous c) Copper d) Sodium
Phosphorus is a non-metal; the rest all are metals. Phosphorus- The Non-metal Phosphorus gets its name from the Greek word... View Article
Which among the following places has a moderate climate? a) Mumbai b) Daman c) Ludhiana d) Kanpur
Mumbai has a moderate climate Explanation Mumbai experiences moderate climate because of its tropical location. Being located on the coast,... View Article
Ethyl alcohol on oxidation with acidified potassium permanganate results in_______
Primary alcohols on oxidation with a strong oxidising agent like potassium permanganate give carboxylic acid. Oxidation of alcohols The oxidation... View Article
Which of the following animals undergoes summer sleep? a) Frog b) Cow c) Goat d) None of the above
The frog is an ectotherm who aestivates or undergoes summer sleep to escape very high temperatures in summer. What is... View Article
Does the chemical adsorption increase or decrease when the surface area of adsorbent increases?
With the increase in surface area of adsorbent, chemical adsorption increases. If the adsorbent surface is more fine or rough,... View Article
Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km/h?
Answer: Mass of the car (m) = 1500 kg Velocity (v) = 60 km/hr v = 60 x 5/18 v... View Article
Which of the following crops is a commercial crop? a) Cotton b) Sugarcane c) Tea d) All of the above
Cotton, sugarcane and tea are commercial crops. Option (d) all of the above is the correct option Commercial crops Crops... View Article
What is the criterion for classification of organisms as belonging to kingdom Monera or Protista?
The organisms belonging to Kingdom Monera are unicellular and prokaryotic, whereas the organisms belonging to Kingdom Protista are unicellular and... View Article
