Which of the following elements shows +7 oxidation state? a) Maganese b) Boron c) Carbon d) Oxygen
Only Mn shows a +7 oxidation state. Mn shows the highest oxidation state of +7. This is because Mn forms... View Article
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When is the force experienced by a current-carrying conductor placed in a magnetic field largest?
The force experienced by a current-carrying conductor is the maximum when the direction of current is perpendicular to the magnetic... View Article
The number of nuclei present in a zygote is A) none B) one C) two D) four
Correct Option: B Solution: A zygote contains a single nucleus. A zygote is formed by the fusion of the sperm and ovum... View Article
Among the group 17 members, radioactivity is present in: a) Fluorine b) Astatine c) Iodine d) Chlorine
Among halogens, only Astatine is a radioactive element. Astatine Astatine is a highly radioactive element, and it is the heaviest... View Article
Why are the small numbers of surviving tigers a cause of worry from the point of view of genetics?
As the tiger population is decreasing sharply, the genetic pool of the tigers is also decreasing. This leads to a... View Article
A number is divisible by both 5 and 12. By which other number will that number be always divisible?
Factors of 5 = 1,5 Factors of 12 = 1, 2, 3, 4, 6, 12 5 and 12 are co-primes,... View Article
Which of the following is used as antipyretic? a) Paracetamol b) Ranitidine c) Bithionol d) Penicillin
Antipyretic drugs are used to reduce fever. Paracetamol is an antipyretic drug. Ranitidine is an antacid. Bithionol (the compound is... View Article
A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?
When an object falls freely, its potential energy gets converted into kinetic energy. When the object hits the ground, its... View Article
Explain the following giving examples. a) saturated solution b) pure substance c) colloid d) suspension
There are different kinds of solutions. Let us learn some sort of solutions in this article. a) Saturated Solution A... View Article
The above reaction is an example of a: Aluminium + Iron (III) oxide gives Aluminium oxide and iron
It is a displacement reaction since aluminium has displaced iron from its compound, Ferric oxide. The reaction between iron(III) oxide... View Article
Which of the following carbohydrates is called milk sugar? a) Galactose b) Fructose c) Lactose d) Glucose
Lactose is called milk sugar. Carbohydrates Carbohydrates can be divided into two main types: simple and complex. Simple carbohydrates are... View Article
Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like humans?
Unlike unicellular organisms, multi-cellular organisms have complex body structures with specialized cells and tissues to perform various necessary functions of... View Article
Which of the following is the best conductor of electricity? a) Tungsten b) Bismuth c) Silver d) Aluminium
Silver is the best conductor of electricity. Why silver is a good conductor of electricity? Silver also has the highest... View Article
Which of the following compound is not chiral? a) DCH2CH2CH2Cl b) CH3CHDCH2Cl c) CH3CHClCH2D d) CH3CH2CHDCl
a) DCH2CH2CH2Cl is not chiral. This compound has no chiral C-atom. All the C atoms are attached to two identical... View Article
Which of the following is an amorphous solid? a) Graphite b) Quartx glass c) Chrome alum d) Silicon carbide
Answer: b) Quartz glass The amorphous solid consists of particles of irregular shape, and there is no long-range order in them.... View Article
Write an expression for the work done when force acts on an object in the direction of its displacement.
Answer: Work is said to be done when the force applied to an object shows the object’s displacement. Let us... View Article
In which of the three media, air, water or iron, does sound travel the fastest at a particular temperature?
The speed of sound depends on the elasticity of the medium. As solids have the highest elasticity, it travels the... View Article
Which among the following is an artificial sweetening agent? a) Honey b) Maple Syrup c) Saccharin d) Molasses
Saccharin is an example of an artificial sweetening agent. Artificial sweetening agent- Saccharin Saccharin is one of the oldest artificial... View Article
Which of the following has the highest energy? (a) X-rays (b) Ultraviolet radiation (c) Gamma rays (d) Infrared radiation.
Answer: (c) Gamma rays E = h.v the order of frequency is Gamma rays > X-rays > ultra-violet radiation > infrared... View Article
What is the term used for secretions of endocrine glands responsible for changes taking place in the body?
Hormones are chemical substances that are secreted by endocrine glands. They are responsible for changes taking place in the body.... View Article
