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Which is the smallest whole number?

Answer: 0 A collection of numbers that includes all positive integers and 0 is known as a whole number. Whole numbers are fractions, decimals,... View Article

Detritus food chain begins with (1) Bacteria(2) Viruses(3) Algae(4) Protozoa

Answer: (1) Detritus food chain in the form of chain wherein the dead organic matter named detritus is used to a full extent, and organic... View Article

Why are bryophytes called amphibians of plant kingdom?

Answer: Bryophytes are non-vascular plants, without xylem and phloem. They reproduce by gamete formation. For eg., mosses, liverworts and... View Article

What is the focal length of a convex lens of focal length 30 cm in contact with a concave lens of focal length 20cm? Is the system a converging or a diverging lens? Ignore the thickness of the lenses.

Answer: Given Focal length of a convex lens f1 = 30cm Focal length of a concave lens f2 = -20cm Focal length formula is 1/f = 1/30 +... View Article

Tertiary butyl methyl ether on treatment with HI forms :(1) Isobutane and Methyl iodide.(2) Isobutanol and Methanol.(3) Tertiary butyl iodide and Methyl iodide.(4) Tertiary butyl iodide and Methanol.

Answer: (4) CH3 - O - C - (CH3)3 + HI → CH3 - OH + (CH3)3- C-I Tertiary butyl methyl ether + Hydrogen iodide → Methanol + Tertiary... View Article

Explain the construction and working principle of an electric motor?

Answer: An electric motor is a device that converts electrical energy into mechanical energy. A power supply – In general, a... View Article

Give information about commonly used gadgets or devices which are based on the principles of newton’s laws of motion.

Answer: Newton's first law of motion: Every object either remains at rest or uniform motion until and unless a force is applied on... View Article

The study of flower is known as(1) Floriculture(2) Pomology(3) Spermology(4) Anthology

Answer: (4) Flowers farming, also known as floriculture, is the cultivation and sale of ornamental and flowering plants for gardens. Indoor... View Article

The valency of potassium ion is:

Answer: 1 Potassium is an alkali metal belonging to group 1, period 4 and s-block element. The atomic number of potassium is 19, the electronic... View Article

What is the full form of LPG

Answer: LPG - Liquefied Petroleum Gas. Liquefied petroleum gas is also called liquid petroleum gas is a flammable blend of hydrocarbon gases... View Article

Write the full name of DDT?

Answer: DDT = Dichloro-Diphenyl Trichloroethane DDT is a colourless, tasteless and odourless organic compound used as an insecticides or pesticide... View Article

The full form of NASA is(1) National Aeronautics and Space Administration.(2) National Aerospace and Space Administration.(3) National Aeronautics and Satellites Administration.(4) National Aeronautics and Space academy.

NASA full from is National Aeronautics and Space Administration. NASA is an agency of the United States government that works for the civil... View Article

Give the full form of LPG and CNG

Answer: The full form of LPG and CNG are given below LPG - Liquefied Petroleum Gas. The principal component in LPG is propane and butane. It... View Article

State the chemical formula of blue vitriol

Answer: The blue vitriol is also known as the Cu(II) sulphate pentahydrate or crystalline copper sulphate. The chemical formula for... View Article

DNA stands for

Answer: DNA - Deoxyribonucleic Acid DNA is a hereditary element present in all living organisms. DNA comprises the genetic instruction to... View Article

Who is regarded as the father of modern chemistry?(1) Albert Einstein(2) C.V Raman(3) Ernest Rutherford(4) Antoine Lavoisier

Answer: (4) Antoine Lavoisier is French chemist and born in Paris on 26 August 1743. His significant contributions to the field of science... View Article

Which one of the following is the correct statement?(1) Q1,Q2,Q3……..are in A.P. with common difference 10.(2) Q1,Q2,Q3……..are in A.P. with common difference 6.(3) Q1,Q2,Q3……..are in A.P. with common difference 12.(4) Q1 = Q2 = Q3 = …..

Answer: (2) Let us consider Tr = 3r2 + 2r - 1 T(r+1)= 3(r-1)2 + 2(r-1) - 1 Qr = T(r+1) - Tr Qr = [3(r-1)2 + 2(r-1) - 1] - [3r2 + 2r -... View Article

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