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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 What is plaster of pairs? Plaster of Paris is a... 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 Electronic configuration of magnesium The atomic number of... 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 What is a neuron? Neurons are the fundamental unit of the nervous system specialized to transmit information... 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... View Article

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

Answer (d) CO2 Structure of CO2 The carbon dioxide molecule has two double bonds between the carbon and oxygen atoms.... 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... 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... View Article

Which of the following cannot be prepared by Kolbe’s electrolysis process? i) Methane ii) Ethyne iii) Ethane iv) None of these

Answer (ii) Ethyne Kolbe’s electrolytic process is used to prepare alkanes. Kolbe’s electrolytic process In this process, the alkane is... View Article

Which of the following has least bond dissociation energy ? a.F₂ b.Cl₂ c. Br₂ d. I₂

I2 has least bond dissociation energy due to its largest size.

Which of the following is not an element of phloem tissue? (1) Tracheidit (2) Sieve tubes (3) Phloem fibres (4) Companion cells

Answer: (1) Tracheidit Phloem Phloem is a living tissue in vascular plants which conducts the soluble organic compounds synthesized during photosynthesis... View Article

Which among the following is an examples of secondary cells?a)Leclanche cell b)Lead-storage battery c)Dry cell d) Alkaline cell

Answer (b) Lead storage battery What is a Lead acid battery? The lead-acid battery is also known as a lead... View Article

Which of the following are the temperate grasslands of North America? i) Eurasian steppes ii) Pampas iii) Prairies iv) Chaurs

Answer (iii) Prairies What are Prairies? The temperate grasslands of North America are known as the Prairies. It is a... View Article

Will current flow more easily through a thick wire or a thin wire of the same material, when connected to the same source? Why?

Answer: As per ohm’s law of electrical resistance, the thickness of the conductive wire is inversely proportional to the amount of... View Article

Find the difference between the greatest and the least number that can be written using the digits 6, 2, 7, 4, 3 each only once.

Given: Few digits: 6, 2, 7, 4, 3 To find: We need to find the difference between the greatest number and the... View Article

Which among the following does not belong to phylum Platyhelminthes? a.Roundworm b.Planeria c.Fasciola d.Echinococcus granulosus

Answer (a) Roundworm Roundworm belongs to the kingdom Aschelminthes commonly called nematodes. Phylum Platyhelminthes Phylum Platyhelminthes belongs to the kingdom... View Article

Which of the following best describes a sol-gel colloidal system? i) Butter and milk ii) Blood iii) Beaten egg whites iv) Paper

Answer (i) Butter and milk Butter is gel and milk is sol. What is a colloid? A colloid is a... View Article

Which of the following is an example of the fold mountain? i) The Himalayas ii) Mount Fuji iii) Appalachian mountain iv) Tetons

Answer (a) The Himalayas Fold mountains Fold mountains are formed by the effects of folding on layers within the upper... View Article

Which of the following group contain mostly radioactive elements ? a)actinoids b)alkaline earth metals c) halogens d) Non metals

Answer (a) Actinoids What are radioactive elements? Radioactive elements are composed up of atoms whose nuclei are unstable and give... View Article

Which set of quantum numbers is correct with n = 3?a. l = 3 , m1 = – 3 b.l = 2 , m1 = + 2 c. l = 2 , m1 = + 3 d. l = 4 , m1 = – 1

For given n, the possible l values are 0, 1, and 2. For l =0, possible ml values is 0.... View Article

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