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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... 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... 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... 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... 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... 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... 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... 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... 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... 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)... 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)

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... View Article

What happens when a piece of silver metal is added to copper sulphate solution? (A) Silver sulphate is formed (B) Silver displaces copper sulphate (C) Oxygen gas is evolved (D) No reaction

No reaction There is no reaction when silver Ag metal is added to copper sulphate CuSO4. Since silver is less... View Article

Vascular tissues that transport water and minerals in plants are called as ___________ (A) Phloem (B) Xylem (C) Sclerenchyma (D) Cambium

Xylem In plants, minerals and water are transported through the xylem cells from soil to the leaves. The xylem cells... View Article

The side faces of a pyramid are (A) Triangles (B) Squares (C) Trapeziums (D) Polygons

Triangles The side faces of a pyramid are triangles. They are also called its lateral faces Hence, the correct option... View Article

If a bimetallic strip is heated it will (A) Bend towards the metal with higher thermal expansion (B) Not bend at all (C) Twist itself into a helix (D) Bend towards the metal with lower thermal expansion

Bend towards the metal with lower thermal expansion On heating, the bimetallic strip starts bending. Bending will be higher towards... View Article

Rainbow is an example for continuous spectrum. Explain

A rainbow is regarded as one of the most spectacular light shows observed on the earth. Rainbow is a multicoloured... View Article

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