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Desired improved variety of economically useful crops are raised by (A) Migration (B) Biofertilizer (C) Hybridization (D) Natural selection

Hybridization In hybridization process, two or more plants of unlike genotypes are crossed together to get offsprings with new desirable... View Article

A hollow metallic sphere of radius 10 cm is given a charge of 3.2 x 10^-9 C. The electric intensity at a point 4 cm from the centre is (A) 9 x 10^-9 NC^-1 (B) 288 NC^-1 (C) 2.88 NC^-1 (D) Zero

Zero At any point inside the conductor electric field remains zero. So, the correct option is (D)... View Article

Which of the following carbohydrates is the sweetest sugar? (A) Glucose (B) Fructose (C) Cellulose (D) Maltose

Fructose Among the given compounds, fructose is the sweetest sugar. It is naturally occurring sugar. Fructose is basically a monosaccharide i.e... View Article

The resistance of a discharge tube is (A) non-ohmic (B) ohmic (C) zero (D) Both (B) and (C)

Non-ohmic When the discharge tube is turned off, it has a very high resistance and when it is turned on, it has a very low frequency. Hence, V... View Article

Soil particles determine its (A) Texture (B) Field Capacity (C) Water holding capacity (D) Soil flora

Texture Soil particles determines its texture. The soil particles enclose living spaces in between them known as pore space. In coarse textured... View Article

A light ray entering glass from water, … (A) it goes away from the normal (B) it bends towards the normal (C) it travels straight without bending (D) it returns back into water

It bends towards the normal When the light rays pass from water into glass, they bend towards the normal. Hence, the correct option is (B)... View Article

Which of the following memories must be refreshed many times per second? (A) Static RAM (B) Dynamic RAM (C) EPROM (D) ROM

Dynamic RAM Dynamic Random Access Memory is the most common type of Random Access Memory for personal computers and workstations. DRAM has to be... View Article

A balloon lifting in air follows the following principle (A) Law of gravitation (B) Archimedes principle (C) Principle of buoyancy (D) All of the above

All of the above When the balloon is lifting in the air the upward thrust or buoyant force acts on the balloon. The balloon continues to move... View Article

Find the intersection of A and B using venn diagram (A) {1, 3, 5, 7} (B) {5, 7} (C) {1, 2, 3, 5, 7, 10} (D) None of these

The given Venn diagram is A∩B = {5, 7} Hence, from the venn diagram the intersection of A and B is {5, 7} Therefore, the correct option is (B)... View Article

Suppose refractive index mu is given as mu = A + B/λ^2 where A and B are constants and λ is wavelength, then dimensions of B are same as that of (A) Wavelength (B) Volume (C) Pressure (D) Area

Area μ = velocity of light in vacuum/velocity of light in medium The refractive index μ is dimensionless. Therefore, each term on right... View Article

The chemical formula of marsh gas (methane) is (A) C2H6 (B) CH4 (C) C3H8 (D) C4H10

CH4 Methane is the main constituent of natural gas and is also known as marsh gas or methyl hydride. Methane is the simplest alkane and has a... View Article

How is the variability in oxidation states of transition metals different from that of the non transition metals? Illustrate with examples

In case of transition elements, the oxidation state can vary from +1 to the highest oxidation state by removing all its valence electrons. Also,... View Article

How does amorphous silica differ from quartz?

In amorphous silica, SiO4 tetrahedra are randomly joined each other whereas in quartz they are linked in a regular manner... View Article

How much would a 70 kg man weigh on the moon? What would be his mass on the Earth and on the moon? (Acceleration due to gravity of moon = 1.63 m/s^2)

Given Mass of a man = 70 kg We need to find the weight of a man on the moon The weight of a man is calculated as, W = mg Given that the... View Article

Where do the following functions occur in humans 1. Production of egg 2. Fertilization 3. Implantation of zygote

1. Production of eggs occurs in the ovary 2. Fertilization occurs at the end of the fallopian tube 3. Implantation of the zygote takes place in... View Article

Type metal is an alloy of Pb, Sb and Sn. It consists of (A) Equal amounts of the three metals (B) More amount of lead (C) More amount of antimony (D) More amount of tin

More amount of lead Type metal is an alloy which contain lead in maximum proportion. Type metal: Pb = 82%, Sb = 15%, Sn = 3% Hence, the... View Article

Which of the following ion is diamagnetic? (A) Zn^+2 (B) Cr^+3 (C) Fe^+3 (D) Mn^+2

Ions are diamagnetic if all the electrons are paired in their electronic configuration. Zn2+ is diamagnetic as it has all paired electrons. The... View Article

State the differences between (a) Decay and putrefaction (b) Pasteurization and sterilization of food/objects/equipments

(a) Decay 1. Complete breakdown of organic matter by bacteria 2. Does not produce a foul smell Putrefaction 1. Incomplete breakdown of... View Article

Two stations due South of a leaning tower which leans the north are at distance a and b metres from it’s foot .If alpha and beta be the angles of elevations of the top of the tower from these stations ,prove that it’s inclination theta to the horizontal is given by cot theta = (b cot alpha – a cot beta)/(b – a)

Let AD is leaning tower inclined at an angle θ with horizontal Let B and C are two stations which are at a distances b and a... View Article

01 Oct 2021: UPSC Exam Comprehensive News Analysis

Oct 1st, 2021, CNA:- Download PDF Here TABLE OF CONTENTS A. GS 1 Related GEOGRAPHY 1. Monsoon may withdraw from next week B. GS 2 Related... View Article

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