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What is meant by term bond order? Write bond orders for N2, O2?

Answer: The bond order shows the number of chemical bonds present between a pair of atoms. The Bond Order Formula can be defined as half of the... View Article

The moment of inertia of a square lamina about the perpendicular axis through its centre of mass is 20 kg per metre square then its moment of inertia about an axis touching its side and in the plane of the lamina will be

Answer: Given parameters Moment of inertia of a square lamina about the perpendicular axis at the center of the square (I0) = 20 kgm-2 Let us... View Article

Two numbers are in the ratio 5:6. If 8 is subtracted from each of the numbers , the ratio becomes 4:5 find the numbers.

Answer: Let us consider the two numbers are x and y Given: x/y = 5/6 x × 6 = y × 5 6x - 5y = 0....................(1) If 8 is subtracted... View Article

Two water taps together can fill a tank in 9 (3/8) hours. The tap of larger diameter takes 10 hrs less than the smaller one to fill the tank separately. Find the time in which each tap can separately fill the tank.

Answer: Let the tap with smaller diameter fills the tank alone in x hours Let the tap with larger diameter fills the tank alone in (x - 10)... View Article

A motorboat whose speed in still water is 18 km/h, takes 1 hour more to go 24 km upstream than to return downstream to the same spot. Find the speed of the stream.

Answer: Given parameters: The speed of the motorboat in still water =18 kmph Let us consider The speed of the stream = s Speed of boat... View Article

The dimensional formula for permittivity of free space (?0) in the equation F = (1/4??0) (q1q2/r2) where, symbols have their usual meaning is (1)

Answer: The permittivity of free space Dimensions of F = [MLT-2] Dimensions of q = [AT] Dimensions of r = [L]... View Article

The distance of closest approach of an alpha-particle fired towards a nucleus with momentum p is r. If the momentum of the alpha-particle is 2p, the corresponding distance of closest approach is (1) 4r (2) 2r (3) 2/r (4) r/4

Answer: (4) All of the kinetic energy of incident particles is converted to the potential energy of the system at the distance of closest... View Article

Pneumatophores occur in (1) Carnivorous plants (2) Free-floating hydrophytes (3) Halophytes (4) Submerged hydrophytes

Answer: (3) Pneumatophores are respiratory roots which are found in halophytes such as mangroves. Halophytes grow in saline swamps, hence... View Article

In albuminous seeds, food is stored in ……… and in exalbuminous seeds, food is stored in ………… (1) Endosperm, cotyledons (2) Cotyledons, cotyledons (3) Cotyledons, endosperm (4) Endosperm, endosperm

Answer: (1) The majority of the monocotyledonous seeds are albuminous seeds, i.e., they have thick, swollen endosperms for nourishment. The... View Article

Polycot is a mixture of __________. (a) Cotton and nylon (b) Polyester and nylon (c) Polyester and cotton (d) Wool and polyester

Answer: (c) Polyester and cotton Polycot is obtained by mixing polyester and cotton. Polycot is popular polyester used in textile manufacturing... View Article

What is meant by teminism??

Answer: Teminism is a theoretical concept. nIt is actually know as Reverse Transcription. This was first discovered in 1978 by Temin and... View Article

Who is the father of genetic engineering? (1) Steward Linn (2) Stanley Cohen (3) Paul Berg (4) Kary Multis

Answer: (4) In 1972 Paul Berg began genetic engineering. With the assistance of the lambda phage, he was able to introduce an SV-40 virus gene... View Article

Write any two solutions of the equation x+y=7

Answer: Given x + y = 7.................(1) Let us consider x = 1 Then equation (1) becomes 1 + y = 7 y = 6 Let us consider x = 2 Then... View Article

Transgenic mice may be used for testing of ________________. (1) The safety of vaccines (2) Efficiency of fertilisers (3) Does of antibiotics (4) All the above

Answer: (1) Trangenic animals are the animals with the modified genome. A foreign gene is inserted into the genome of the animal to alter its... View Article

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