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Shares of ___________ company are freely transferable (a) Private Company (b) Public Company (c) Both (a) and (b) (d) None of these

The shares of a public limited company are freely transferable. Hence, the answer is Public Company. So, the correct option is (b)... View Article

The angle of elevation of a jet plane from a point a on the ground is 60^0. After a flight of 20 seconds at the speed of 432 km/hour, the angle of elevation changes to 30^0. If the jet plane is flying at a constant height, then its height is: (a) 1200 √3 m (b) 1800 √3 m (c) 3600 √3 m (d) 2400 √3 m

v = (432 x 1000) / (60 x 60) m/sec v = 120 m/sec Distance PQ = v x 20 PQ = 120 x 20 PQ = 2400 m In △PAC tan 600 = h/AC ⇒ AC = h/√3 In... View Article

Chromatography is a technique based on (a) adsorption and then dispersion of solute (b) absorption of solute (c) hydration of solute (d) evaporation of solute

Chromatography is a technique based on adsorption and then dispersion of solute. Hence, the correct option is (a) Learn more: Chromatography... View Article

Binary fission is oblique in (A) Ceratium (B) Noctiluca (C) Fuligo (D) Vorticella

Binary fission is a form of asexual reproduction in which an organism divides into two, each part carrying one copy of genetic material.”... View Article

A car is accelerated on a levelled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car (a) does not change (b) becomes twice to that of initial (c) becomes 4 times that of initial (d) becomes 16 times that of initial

Answer is 'does not change' Potential energy is the product of height, mass and gravity. Hence height is a factor in determining potential... View Article

Which one of the following is not a pythagorean triples? (a) 11, 60, 61 (b) 16, 63, 65 (c) 28, 45, 53 (d) 30, 80, 89

Applying Pythagorean triples rule a2 + b2 = c2 Option (a) 112 + 602 = 612 121 + 3600 = 3721 3721 = 3721 Option (b) 162 + 632 = 652 256 + 3969 =... View Article

Biuret test is not given by: (A) Carbohydrates (B) Polypeptides (C) Urea (D) Proteins

Biuret test is the characteristic test for the amide linkage. We know that it is present is urea, polypeptides and proteins. Since, carbohydrates... View Article

State three differences between direct current and alternating current

The three differences between direct current and alternating current are as follows: Alternating current 1. AC is safe to transfer longer... View Article

Give two different examples of pair of (i) Similar figures (ii) Non-similar figures

Similar figures are two figures having the same shape. The objects which are of exactly the same shape and size are known as congruent objects.... View Article

Represent the following numbers on a number line: (a) +5 (b) -10 (c) +8 (d) -1 (e) -6

The given numbers on a number line are shown below (a) +5 (b) -10 (c) +8 (d) -1 (e) -6... View Article

In a potentiometer experiment, the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of 2 Ω, the balancing length becomes 120 cm. The internal resistance of the cell is (a) 1 Ω (b) 0.5 Ω (c) 4 Ω (d) 2 Ω

Internal resistance of the cell r, is given by r = R [(l1/l2) - 1] r = R [(l1 - l2)/ l2] r = 2 [(240 - 120)/120] On calculating further, we... View Article

The sum of the digits of a two digit number is 12. The number obtained by interchanging its digits exceed the given number by 18. Find the number

Let x be the digit at tens place and y be the digit at units place Then, x + y = 12 ..... (1) Required number = (10x + y) Number obtained on... View Article

Find any ten rational numbers between -5/6 and 5/8

Given Two rational numbers -5/6 and 5/8 Making denominators same -5/6 x 4/4 = -20/24 5/8 x 3/3 = 15/24 Hence, Ten rational numbers between... View Article

In triangle PQR, right angled at Q, PR + QR = 25 cm and PQ = 5 cm. Find all the sides.

Given PQ = 5 cm PR + QR = 25 cm Now, let us assume, QR = x PR = 25 - QR PR = 25 - x As per the Pythagoras theorem PR2 = PQ2 + QR2 Substitute the... View Article

What characteristic property of light is responsible for the blue colour of the sky? (A) Interference (B) Diffraction (C) Scattering (D) Dispersion

Scattering The sunlight that reaches the earth’s atmosphere is scattered in all directions by the gases and dust particles present in the... View Article

Addition of pentavalent impurity to a semiconductor creates many (A) Free electron (B) Holes (C) Valence electrons (D) Bound electrons

Addition of pentavalent impurity to a semiconductor creates many 'free electron'. Hence, the correct option is (A) ... View Article

A person on tour has Rs 360 for his expenses. If he extends his tour for 4 days, he has to cut down his daily expenses by Rs 3. Find the original duration of the tour.

Let x days be the original duration of the tour Total expenditure on tour = Rs 360 Expenditure per day = Rs 360/x Duration of the extended tour =... View Article