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The radius of a hemispherical balloon increases from 6 cm to 12 cm as air is being pumped into it. The ratio of the surface areas of the balloon in the two cases are a) 1:2 b) 4:2 c) 2:3 d) 1:4

Option d) 1:4 Total surface area of a Hemisphere =2πr2+πr2=3πr2When... View Article

In a collection of H-atoms, all the electrons jump from n=5 to ground level finally (directly or indirectly), without emitting any line in the Balmer series. The number of possible different radiation is: a) 2 b) 4 c) 6 d) 8

Option c) 6.... View Article

What a silly mistake has been done by you. Synonym for silly will be a) Absurd b) Accessory c) Abundant d) Abstain

Option a) Absurd. The synonym for silly is absurd.... View Article

We all love to eat pizzas of which country is pizza a traditional dish a) India b) Italy c) France d) China

Option b) Italy. Pizza is a traditional dish of Italy.... View Article

Which of the following statements are true (a) Water expands on heating from 4∘C to 40∘C (b) Rubber contracts on heating (c) Water contracts on heating from 0∘C to 4∘C (d) Water expands on freezing i) b) is correct ii) c) and a) are false iii) only a) is correct iv) all are correct

Option iv) all are correct.... View Article

A compound used as pistachio flavour in ice cream is a) acetophenone b) butyraldehyde c) muscone d) vanillin

Option a) acetophenone. Acetophenone is a methyl ketone that is used as a flavoring agent in foods, fragrances in soaps as well as perfumes, and... View Article

WHO was established in a) 1978 b) 1998 c) 1989 d) 1948

Option d) 1948. World Health Organisation (WHO ) is a specialized agency of the United Nations Organisation (UNO) established in 1948.... View Article

The upper limit of the fifth class a) 50 b) 52 c) 54 d) 56

Option c) 54. The fifth class is in the interval, 50−54. Hence, the upper limit is 54, and 50 is the lower limit.... View Article

What was the computer conceived by babbage a) Arithmetic Machine b) Donald Knuth c) Analytical Engine d) None of the options

Option c) Analytical Engine. In the 19th century, the first computer, designed and developed partly by the English inventor Charles Babbage is... View Article

The mode of nutrition in Rhizopus is a) Saprophytic b) Parasitic c) Autotrophic d) Symbiotic

Option a) Saprophytic. The living organisms that live and feed on dead and decaying organisms are known as saprophytes.... View Article

What is water gas used for?

Uses of water gas:<ul><li>Water gas is used to remove carbon dioxide from fuel cells.</li><li>Water gas is used in... View Article

Option a) Self-government for India within the British Common-wealth. The Home Rule was started during World War I in April 1916 and lasted till 1918. It was started by Bal Gangadhar Tilak and Annie Besant.

Option a) Metabolic waste products. Excretion is the process of removal of metabolic waste products from the body. Excretory products include... View Article

Excretion is the removal of a) Metabolic waste products b) Carbon dioxide c) Extra water d) Harmful and useless ingredients

Option a) Metabolic waste products. Excretion is the process of removal of metabolic waste products from the body. Excretory products include... View Article

The refractive index of glass is 1.520 for red light and 1.525 for blue light. Let D1 and D2 be angles of minimum deviation for red and blue light respectively in a prism of this glass. Then : a) D1>D2 b) D1=D2 c) D1

Option c) D1<D2. We know that angle of minimum deviation is given by D=(μ−1)A. μblue>μred Hence, D2>D1... View Article

Fresh fruit contains 68% water and dry fruit contains 20% water How much dry fruit can be obtained from 100 kg of fresh fruits? a) 30 Kg b) 50 Kg c) 42 Kg d) 80 kg

Given: Quantity of pulp in 100kg of fresh fruits=(100-68)% =32kg. Let x be the quantity of dry fruit obtained. then (100-20)% of x=32 80x/100=32... View Article

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