What is the mass of carbon dioxide which contains the same number of molecules as are contained in 40 g of oxygen? (A) 40 g (B) 55 g (C) 32 g (D) 44 g
Molar mass of O2 = 2 x 16 = 32 g 32 g of O2 = 6.023 x 1023 molecules... View Article
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Brass gets discoloured in air because of the presence of which of the following gases in air? (A) Oxygen (B) Hydrogen Sulphide (C) Carbon dioxide (D) Nitrogen
Hydrogen Sulphide Due to the presence of hydrogen sulphide, brass gets discoloured in air Hence, the correct option is (B)
A person on tour has rupees 4200 for his expenses. If he extends his tour for 3 days, he has to cut down daily expenses by rupees 70. Find the original duration of the tour.
Given Total money a person has = Rs 4200 Let the duration of tour = x days Expense in a... View Article
The edible portion in a fresh onion comprises (a) modified leaves (b) buds and leaf bases (c) swollen stem (d) disc-like stem
The edible portion in a fresh onion comprises modified leaves Hence, the correct option is (a)
Find the equation of a line passing through the point (2, 3) and parallel to the line 3x – 4y + 5 = 0. (a) 4x – 3y + 6 = 0 (b) 3x – 4y + 6 = 0 (c) 3x + 3y – 6 = 0 (d) None of these
Any line parallel to 3x – 4y + 5 = 0 will be of the form 3x – 4y +... View Article
What is the IUPAC name of succinic acid?
The IUPAC name of succinic acid is ‘Butanedioic acid’
Which one is not a source of carbohydrates? (a) Wheat (b) Gram (c) Rice (d) Sorghum
Gram is not a source of carbohydrates whereas wheat, rice and sorghum are sources of carbohydrates Hence, the correct option... View Article
The term that is used for the mode of nutrition in yeast, mushroom and bread-mould is (a) autotrophic (b) insectivorous (c) saprophytic (d) parasitic
Answer is ‘saprophytic’ These are all fungi. They absorb the nutrients from the dead and decaying matter. They secrete digestive... View Article
Answer the following questions in a few words or a couple of sentences each. (i) How old was Evelyn when she went to the Royal Academy of Music? (ii) When was her deafness first noticed? When was it confirmed?
(i) Evelyn was sixteen years old when she went to the Royal Academy of Music (ii) Her deafness was first... View Article
What is the action of chlorine on excess NH3?
Chlorine when reacted with excess of ammonia give ammonium chloride and nitrogen gas. The reaction can be given as below... View Article
The temperature of the system decreases in the process of (A) free- expansion (B) adiabatic expansion (C) isothermal expansion (D) isothermal compression
The temperature of the system decreases in the process of an ‘Adiabatic expansion’ Adiabatic expansion is defined as an ideal... View Article
What is ‘AGMARK’? (a) Name of Brand (b) A Marketing Research Organisation (c) Eggs supplied by Government-run cooperative (d) Agriculture marking on Agro products
Agriculture marking on Agro products A certification mark to assure the quality of agricultural products in India is known as... View Article
What was Apartheid?
Apartheid was a system, which existed in some parts of South Africa from 1948 until the early 1990s. Apartheid refers... View Article
Solve: 3x + 4y = 25, 5x – 6y = -9 by elemination method
Given 3x + 4y = 25 ……….. (1) 5x – 6y = -9 …………(2) Multiplying equation (1) by 3 and... View Article
The Buddha attained nirvana at ________ (a) Bodh Gaya (b) Sarnath (c) Sanchi (d) Kusinagara
Answer is Bodh Gaya Buddha attained Nirvana/enlightenment at Gaya, Magadha (Bihar) under a peepal tree (Bodhi tree), on the banks... View Article
Explain why:(a) Air is used to inflate tyres (b) Steel is used to make railway lines
(a) When air is blown the particles in air pushes the tyre walls from inside and exerts a pressure on... View Article
A body crosses the topmost point of a vertical circle with critical speed. What will be its centripetal acceleration when the string is horizontal. (A) g (B) 2g (C) 3g (D) 6g
Consider the formula v2 = u2+2gh v2 = (√gl)2 + 2gl v2 = gl + 2gl v2 = 3gl v... View Article
One hormone hastens maturity period in juvenile conifers, a second hormone controls xylem differentiation, while the third increases the tolerance of plants to various stresses. They are respectively (a) Auxin, Gibberellins, Cytokinin (b) Auxin, Gibberellins, ABA (c) Gibberellin, Auxin, Cytokinin (d) Gibberelin, Auxin, ABA
Answer is Gibberellin, Auxin, ABA (1) Gibberellin is a plant hormone i.e. involved in a wide range of physiological responses... View Article
The n rows each contaning in cells in series are joined in parallel. Maximum current is taken from this combination across an external resistance of 3Ω. If the total number of cells used is 24 and internal resistance of each cell is 0.5Ω, then (a) m = 8, n = 3 (b) m = 6, n = 4 (c) m = 12, n = 2 (d) m = 2, n = 12
Total number of cells = m x n = 24 …… (1) When equivalent resistance is equal to external resistance... View Article
Colloidal solution of a liquid dispersed in solid is called gel (A) True (B) False
True Colloidal solution of a liquid dispersed in solid is called gel. Gels are a type of sols in which... View Article
