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Which of the following continent was not part of the Gondwanaland? i) India ii) Europe iii) South America iv) Australia

Answer (ii) Europe Gondwanaland also referred to as Gondwana was a supercontinent that broke 180 million years ago. The Gondwanaland... View Article

A machine, on an average, manufactures 2,825 screws a day. How many screws did it produce in the month of January 2006?

Given that Number of screws manufactured in one day =2,825 Find out Screws produced in the month of January 2006. Solution We know that... View Article

During electrolysis, the reaction that takes place at cathode is _____. a. Oxidation b.Reduction c.Decomposition d.Redox

During electrolysis, the reaction that takes place at the cathode is (b) reduction Electrolysis is defined as a process of decomposing ionic... View Article

Which of these hormones is/are NOT secreted by the pituitary gland? a. Cortisone b.Somatostatin c.Vasopressin d.Ghrelin

Answer (a) Cortisone Cortisone is a glucocorticoid and is secreted by the adrenal cortex The Pituitary gland, also known as the hypophysis,... View Article

Which of the following elements has the electronic configuration 3s¹? a.Sodium b. Chlorine c.Oxygen d. Helium

Answer (a) Sodium Sodium is a chemical element with the symbol Na and the atomic number 11. It has a single electron in its outer shell that... View Article

Compute the heat generated while transferring 96000 coulomb of charge in one hour through a potential difference of 50 V.

Answer: Given parameters Charge (Q) = 96000 C Time (t) = 1hr = 60 x 60 = 3600 s Potential difference (V) = 50 V Let us calculate current (I)... View Article

Select the parameter that needs to be constant for Charles law: i) Pressure ii) Temperature iiii) Volume iv) Surface area

The parameter that needs to be constant for Charles law is i) Pressure It states that at constant pressure, the volume of a fixed amount of dry... View Article

What are the advantages and disadvantages of using a solar cooker? Are there places where solar cookers would have limited applications.

Answer: A solar cooker is defined as a cooker that uses direct sunlight as the energy for cooking and heating of food. The most commonly used... View Article

A student multiplied 7236 by 65 instead of multiplying by 56. By how much was his answer greater than the correct answer?

Given that The student multiplied the number 7236 by 65 instead of 56 We need to find out We need to find out by how much was his answer... View Article

Which of the following tissue is not found in animals? (a)epithelial tissue (b)connective tissue (c)muscle tissue (d)parenchyma

Answer Option (d) Parenchyma Parenchyma is a type of simple permanent tissue that makes a major part of ground tissues in plants, where other... View Article

Which of the following oxides has a three dimensional structure? a. CO₂ b.SO₂ c.CO d. SiO₂

Answer (d) SiO2 Silicon dioxide is a covalent, network solid in which each silicon atom is tetrahedrally surrounded by 4 oxygen atoms. Silicon... View Article

Which of the following carbohydrate is an example of an oligosaccharide? i) Glucose ii) Lactose iii) Fructose iv) Galactose

Answer (ii) Lactose Lactose is an oligosaccharide because it gives 2 to 10 monosaccharide units on hydrolysis. Oligosaccharides are compounds... View Article

Which of the following substances is used for supporting fractured bones? a. Plaster of Paris b. Iron c. Copper d. Titanium

The substances are used for supporting fractured bones is (a)Plaster of Paris Plaster of Paris is a chemical compound consisting of fine white... View Article

Choose the correct option for the electronic configuration of magnesium: i) 3s2 ii) 4f14 5d10 6s1 iii) 4d10 5s1 iv) 2s2 2p2

The correct option for the electronic configuration of magnesium is (i)[Ne] 3s2 The atomic number of magnesium is 12. The electronic... View Article

Which of the following is not an example of a tissue? i) Neuron ii) Cardiac muscle tissue iii) Epithelial tissue iv) Muscle

Answer (i) Neuron Neurons are the fundamental unit of the nervous system specialized to transmit information to different parts of the body. A... View Article

How can three resistors of resistances 2 Ohm, 3 Ohm and 6 Ohm be connected to give a total resistance of (a) 4 Ohm, (b) 1 Ohm?

Solution Given There are three resistors of resistances 2 Ohm, 3 Ohm, and 6 Ohm respectively. Let R₁ = 2 Ω R₂ = 3 Ω R₃ = 6 Ω (a) ... View Article

Among the following molecules, the molecule with linear shape is: a)Water b)BH₃ c)Ch₄ d)CO₂

Answer (d) CO2 The carbon dioxide molecule has two double bonds between the carbon and oxygen atoms. Each double bond is made up of one sigma... View Article

Which of the following is not a research laboratory waste?a)Chemical Waste b)Radioactive Waste c)Clinical Waste d)Cattle dung

Answer (d) Cattle dung Chemical Waste, Radioactive Waste and Clinical Waste are generated after doing certain experiments in the laboratory.... View Article

When a balloon is inflated by blowing air into it, the What happens to the balloon when it is inflated by blowing air into it?

Gas particles exert pressure on the walls of the container in which the gas is filled. For example, when a balloon is inflated, the air inside it... View Article

Which of these is a genetic defect related to the eye? a.Colour blindness b.Usher’s syndrome c.Pallister W syndrome d.Alopecia

Answer (a) Colour Blindness Colour blindness is a disease present on the X chromosome. It is a genetic disease and affects males mostly.... View Article

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