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Cell mediated immunity is provided by (A) B-Lymphocytes (B) Plasma cells (C) Interferon (D) T-Lymphocytes

T-Lymphocytes Cell-mediated immunity is facilitated by the T-helper and cytotoxic T-cells. Cytokines secreted by the T- helper cells activate... View Article

Give the exact location of the lenticels

A lenticel is a porous tissue comprising cells with huge intercellular spaces. These can be found in the roots of dicotyledonous flowering... View Article

What is picric acid? How it is prepared from phenol?

Picric acid is an organic compound. 2, 4, 6 - trinitrophenol is the IUPAC name of picric acid. It is an acid phenol and an explosive compound... View Article

A cycle dynamo works on the principle of (A) Chemical effects of current (B) Magnetic effects of current (C) Electromagnetic induction (D) Mechanical effects of current

Electromagnetic induction A cycle dynamo works on the principle of Faradays laws of electromagnetic induction. It is an electric motor in which... View Article

Describe the industrial policy 1991, towards the public sector?

Following reforms were introduced in the Industrial Policy, 1991 for the public sector. 1. Dereservation: In 1991, only 8 industries were... View Article

Phenyl isocyanide is formed when chloroform is treated with alcoholic potassium hydroxide and: (A) Benzaldehyde (B) Aniline (C) Phenol (D) Nitrobenzene

Aniline Phenyl isocyanide is formed when chloroform is treated with alcoholic potassium hydroxide and aniline in carbylamine reaction. C6H5NH2 +... View Article

Which one of the following is the weakest acid? (A) HF (B) HCl (C) HBr (D) HI

HF Hydrofluoric acid is a weak acid with the chemical formula HF. This compound is considered to be a weak acid because it does not completely... View Article

The decimal 0.238 is equal to the fraction (A) 119/500 (B) 238/25 (C) 119/25 (D) 119/50

119/500 Decimals can be converted into fractions by removing their decimal points and writing 10,100, etc in the denominators, depending upon the... View Article

Tick the correct option. The equator does not pass through which one of the following? (A) Kenya (B) Mexico (C) Indonesia (D) Brazil

The equator does not pass through Mexico. Equator passes through 13 countries. It passes through Ecuador Colombia, Brazil, Gabon, Congo,... View Article

The dynamic mass of a photon of wavelength lambda is (A) Zero (B) h/cλ (C) h/λ (D) hc/λ

p = m x v The momentum for photon Since v = c p = m x c We know that, λ = h/p where p is momentum and h is planck's constant... View Article

A rasping organ with transverse teeth and present in the buccal cavity of a molluscs is called (A) Dental plate (B) Radula (C) Tongue (D) Rasper

A rasping organ with transverse teeth and present in the buccal cavity of a molluscs is called radula. Therefore, the correct option is (B)... View Article

Classify the states into four groups each having common frontiers with Pakistan, China, Myanmar and Bangladesh

The states having common frontiers with the countries like Pakistan, China, Myanmar and Bangladesh are as follows 1. Pakistan: Jammu and Kashmir,... View Article

A hemispherical bowl of internal radius 9 cm contains a liquid. This liquid is to be filled into cylindrical shaped small bottles of diameter 3 cm and height 4 cm. How many bottles will be needed to empty the bowl?

Given Radius of hemispherical bowl = 9 cm Hence, volume of the bowl = (2/3)πr3 = (2/3) x (22/7) x 9 x 9 x 9 = 1527.42 cm3 Since height of the... View Article

Nissls granules are absent in (A) Axon (B) Dendron (C) Soma (D) All of the above

Axon Nissl’s Granules are the substances found in the neurons which are a large granular type of body. The granules are basically the... View Article

A rocket is in the form of a circular cylinder closed at the lower end with a cone of the same radius attached to the top. The cylinder is of radius 2.5 m and height 21 m and the cone has the slant height 8 m. Calculate the total surface area and the volume of the rocket.

Given, Radius of the cylindrical portion of the rocket (R) = 2.5 m Height of the cylindrical portion of the rocket (H) = 21 m Slant Height of the... View Article

Depreciation is always charged on ___________assets (A) Current (B) Fixed (C) Fictitious (D) Intangible

Fixed assets Any fixed asset that is acquired by a business is subjected to wear and tear and obsolescence over a time. This decrease in... View Article

The point which divides line segment joining the points (7, -6) and (3, 4) in ratio 1:2 internally lies in the(A) I quadrant (B) II quadrant(C) III quadrant(D) IV quadrant

The correct answer is (d) IV quadrant From the section formula, we know that The coordinates of the point A(x, y) which divides the line... View Article

Embryo sac is to ovule as ____________ is to an anther (A) Stamen (B) Filament (C) Pollen grain (D) Androecium

The embryo sac is to ovule as pollen grain is to an anther. Hence, the correct option is (C)... View Article

Write Arrhenius Equation and explain the terms involved in it

The Arrhenius equation is an expression that provides a relationship between the rate constant (of a chemical reaction), the absolute... View Article

There are two radioactive substances A and B. Decay constant of B is two times that of A. Initially both have equal number of nuclei. After n half lives of A, rate of disintegration of both are equal. The value of n is (A) 4 (B) 2 (C) 1 (D) 5

Let us consider λA = λ Therefore, λB = 2λ If N0 is the number of atoms in A and B at t = 0, then initial rate of... View Article

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