What is the action of heat onk2cr2o7?
Answer: Potassium dichromate decomposes when heated very strongly with the evolution of oxygen. First, it melts at 398 ° C... View Article
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Sodium carbonate can be manufactured by Solvay’s process but potassium carbonate cannot be prepared because : (1) K2CO3 is more soluble (2) K2CO3 is less soluble (3) KHCO3 is more soluble than NaHCO3 (4) KHCO3 is less soluble than NaHCO3
Answer: (c) Solvey method can not prepare potassium carbonate since it is relatively soluble in water, unlike sodium carbonate potassium... View Article
The LSA (lateral surface area) of a cube of side 1 cm is (1) 16cm^3 (2) 4cm^3 (3) 2cm^3 (4) 1cm^3
Answer: (2) Cube: A cube is a three-dimensional shape which is defined XYZ plane. It has six faces, eight vertices... View Article
The human brain weight approximately ……….% of the body weight. (1) 1% (2) 2% (3) 5% (4) 10%
Answer: (2) The adult human brain weighs about 1,300-1,400 g that is equal to the 3 pounds. The adult human... View Article
The gap between two neurons is called as (1) dendrite (2) synapse (3) axon (4) impulse
Answer: (2) Synapse Synapse is defined as the point of contact between the terminal branches of the axon of one neuron... View Article
Compare Schizocoelom with enterocoelom
Answer: Based on formation, the coelom is classified into two types: Schizocoelom and Enterocoelom. Schizocoelom – It is present in... View Article
Explain the following terms with suitable examples. (i) cationic detergents (ii) anionic detergents and (iii) non-ionic detergents.
Answer: Detergents are cleaning agents, commonly made from synthetic resources such as petroleum fraction, hydrocarbon or coal. Detergents are sodium... View Article
Distilled water is a good conductor of electricity. (1) True (2) False
Answer: (2) The availability of ions is very important to conduct electricity. Distilled water is a pure type of water... View Article
Cuscuta is an example of (1) Brood parasitism (2) Predation (3) Endoparasitism (4) Ectoparasitism
Answer: (4) Cuscuta is an example of Parasite. It takes shelter in a host cell. It’s dependent on food from... View Article
What is Jhum cultivation? Where is it followed in India?
Answer: Jhum cultivation also called slash and burn agriculture is a form of crop-growing farming activity. In the North-East states,... View Article
State the function of bowman capsule and glomerulus
Answer: The structural and functional unit of the kidney is called a nephron. It consists of two main parts viz.... View Article
The most common type of ovule in angiosperms is (1) Anatrapous ovule (2) Amphitropous ovule (3) Orthotropous ovule (4) Antropous
Answer: (1) The most common form of the ovule in Angiosperm is anatrapous ovule. The ovule is inverted, and the... View Article
Fat is completely digested in the (1) Stomach (2) Mouth (3) Small intestine (4) Large intestine
Answer: (3) Fat is completely digested in the Small intestine The presence of fat in the small intestine produces hormones... View Article
What is the Main Constituent of LPG?
Answer: Liquefied petroleum gas, or commonly referred to as LPG is a flammable mixture of hydrocarbon gases that are used... View Article
What is Baeyer’s reagent?
Answer: Baeyer’s reagent is an alkaline solution of cold potassium permanganate(KMNO4) of violet colour solution. It is a strong oxidizing... View Article
How do you find the coordination number of sodium chloride (NaCl) ?
Answer: Sodium chloride (NaCl) or table salt is an ionic compound. It means that each cation will have exactly one... View Article
Write in numerals: Ten lakh ninety thousand nine hundred nine. (1) 10.09.009 (2) 10,90,909 (3) 10,909 (4) 10, 09, 909
Answer: (2) Ten lakh ninety thousand nine hundred nineIn numerical it can be written as 10,90,909.
Write the properties of electric lines of force.
Answer: Definition: Electric field lines are an excellent way of visualizing electric field. Electrical lines of force can be described... View Article
Inexhaustible resources are (1) Not going to finish (2) Will finish (3) Will renewed (4) None of the above
Answer: (1) Nature has blessed us with an unlimited supply of resources such as air, water and sunlight. These resources... View Article
Find the volume of a hemisphere whose radius is 7 cm. (Given pi = 22/7)
Answer: (3) Radius of hemisphere = 7cm The volume of the hemisphere (V) = (2/3)πr3 V = (2/3) × 3.14... View Article
