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Line l is the bisector of an angle A and B is any point on l. BP and BQ are perpendiculars from B to the arms of A . Show that: (i) ΔAPB ≅ ΔAQB (ii) BP = BQ or B is equidistant from the arms of A

Given Line l is the bisector of angle A and the line segments BP and BQ are perpendiculars drawn from l. To prove (i) ΔAPB ≅... View Article

Enzymes are basically made of (a) Nucleic acids (b) Proteins (c) Fats (d) Vitamins

Enzymes are basically made of Proteins Majority of enzymes are proteins with catalytic capabilities crucial to perform different processes.... View Article

How many plants among Indigofera, Sesbania, Salvia, Allium, Aloe, mustard, groundnut, radish, gram, and turnip have stamens with different lengths in their flowers?(a) Three(b) Five(c) Four(d) Six

Answer: Four The family having different length stamens in their flower are Brassicaceae and Lamiaceae. Families of the given plants are:... View Article

What is the voltage of the electricity that is generally supplied to a house?

The voltage of the electricity that is generally supplied to a house is 220 volt.... View Article

Geometrical isomers are differ in (a) Position of functional group (b) Position of atoms (c) Spatial arrangement of atoms (d) Length of carbon chain

Geometrical isomers differs in spatial arrangement of atoms Geometrical isomers have the same formula but differ in the arrangement of the atoms... View Article

A thin rod of length L and mass M is bent at the middle point O at an angle of 60 degree. The moment of inertia of the rod about an axis passing through O and perpendicular to the plane of the rod will be: (a) ML^2/6 (b) ML^2/12 (c) ML^2/24 (d) ML^2/3

The rod is bent at the middle, so each part of it will have same length (L/2) and mass (M/2) Moment of inertia of each part through its one end =... View Article

An ore of potassium is: (a) bauxite (b) dolomite (c) carnallite (d) cryolite

The ore of potassium is carnallite. The structural formula is KCl.MgCl2.6H2O Hence, the correct option is (c)... View Article

The process by which water enters the root hair cell is __________

The process by which water enters the root hair cell is known as osmosis. Water enters into root hair through osmosis due to the semipermeability... View Article

Which of the following is not a pollutant? (a) SO2 (b) CO2 (c) CO (d) NO2

CO2 Carbon dioxide is naturally produced by animals and humans as a byproduct of metabolic activities. It is responsible for maintaining the... View Article

Who am I? I am ATP producing factory

Mitochondria – Mitochondria are membrane-bound organelles present in the cytoplasm of all eukaryotic cells, that produces adenosine... View Article

Water flows through a cylindrical pipe whose inner radius is 1 cm, at the rate of 80 cm/s in an empty cylindrical tank, the radius of whose base is 40 cm. What is the rise of water level in tank in half an hour?

Given radius of tank, r1 = 40 cm The height of water level in tank in half an hour be 1 cm Also given the internal radius of cylindrical pipe, r2... View Article

Avogadro’s number is the number of molecules present in (a) 1 g of molecule (b) 1 atom of molecule (c) 1 mole (d) 1 litre of molecule

1 mole The number of particles present in one mole of any substance is a fixed value of 6.022 x 1023. This value is called Avogadro’s... View Article

Pneumatophores are (a) Negatively geotropic (b) Positively geotropic (c) Negatively phototropic (d) Thigmotropic

Negatively geotropic Pneumatophores are also known as breathing roots. These roots are available in mangrove trees. These are the changes in the... View Article

Kinetic energy depends on (a) Position (b) Velocity (c) Shape (d) Colour

Velocity Kinetic energy of an object is the measure of the work an object can do by the virtue of its motion. Kinetic energy depends on (i)... View Article

Backing storage is so named because it (a) is always kept at the back of the CPU (b) is slow and backward (c) backs up the computer (d) lags behind the main memory (e) None of the above

Backs up the computer In information technology, backing up is a process which refers to the copying into an archive file of computer data in... View Article

Which is valid extension that user creates on operating system? (A) Com (B) Sys (C) Bat (D) Exe

Bat Therefore, the correct option is (C)... View Article

The compressibility of a gas is less than unity at STP. Therefore: (A) Vm greater than 22.4 L (B) Vm less than 22.4 L (C) Vm equal to 22.4 L (D) Vm equal to 44.8 L

For an Ideal gas, PV = nRT Z = 1 Since, compressibility (Z) = pV/nRT for Z less than unity pV/nRT < 1 or pv < nRT At standard... View Article

Use a suitable identity to get following products (2y+5) (2y+5)

Given (2y + 5)(2y + 5) = (2y + 5)2 Using Identity (a + b)2 = a2 + 2ab + b2 (2y + 5)2 = (2y)2 + 2(2y)(5) + (5)2 We get, (2y + 5)2 = 4y2 + 20y + 25... View Article

A guy wire attached to a vertical pole of height 18 m is 24 m long and has a stake attached to the other end. How far from the base of the pole should the stake be driven so that the wire will be taut?

Given A guy wire attached to a vertical pole of height 18 m is 24 m long and has a stake attached to the other end. We need to find the... View Article

What shape is a roadroller?

A road roller is cylindrical in shape. A cylinder is a three-dimensional shape consisting of two parallel circular bases, joined by a curved surface.... View Article

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