Difference Between List and ArrayList in Java
Both of these are members of the Collection framework, but there is a major difference between List and ArrayList in... View Article
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Difference Between Software and Application
Software Vs. Application: Find the Difference Between Software and Application Both of these help a user in performing tasks on... View Article
Meristematic tissue in vascular bundle is (A) Phellem (B) Procambium (C) Interfascicular cambium (D) Fascicular cambium
Fascicular cambium The cambium present between the xylem and phloem of vascular bundle is known as vascular cambium. It is... View Article
A mineral is called ore if (A) the metal extracted is costly (B) the metal can be extracted from it (C) a metal can be profitably extracted from it (D) a metal can not be extracted from it
A mineral is called ore if a metal can be profitably extracted from it. Therefore, the correct option is (C)
A body of mass m moving along a straight line covers half the distance with a speed of 2ms^-1. The remaining half of the distance is covered in two equal time intervals with a speed of 3 ms^-1 and 5 ms^-1 respectively. The average speed of the particle for the entire journey is (A) 3/8 ms^-1 (B) 8/3 ms^-1 (C) 4/3 ms^-1 (D) 16/3 ms^-1
Let the total distance travelled by the body = 2S If t1 is the time taken by the body to... View Article
A pump is used to lift 500 kg of water from a depth of 80 m in 10 s. Calculate the power rating of the pump if its efficiency is 40% (A) 100k W (B) 40k W (C) 16k W (D) None of the above
Force = m x g F = 500 x 10 = 5000 N Work = F x s W =... View Article
Electrode potential of hydrogen electrode is 18 mv then [H^+] is: (A) 0.2 (B) 1 (C) 2 (D) 5
Given \(\begin{array}{l}E_{H^{+}/H_{2}}=18 \times 10^{-3}V\end{array} \) [H+] =? Applying Nernst equation, \(\begin{array}{l}E_{H^{+}/H_{2}}= E_{H^{+}/H_{2}}^{0} – \frac{0.0591}{1}log\frac{1}{\left [ H^{+} \right ]}\end{array} \) 18... View Article
Distinguish between desire and demand
Desire 1. Desire simply refers to the mere wish of a person to have a particular commodity, irrespective of the... View Article
A refrigerator whose coefficient of performance K = 5, extracts heat from the cooling compartment at the rate of 250 J/cycle. What is the work done per cycle to operate the refrigerator? How much heat is discharged per cycle to the room which acts as the high temperature reservoir? (A) 50 J (B) 200 J (C) 300 J (D) None
Work done per cycle W = Q2/K Given Q2 = 250 J On substituting, we get, W = 250/5 W... View Article
A 100 mL solution of 0.1 N HCl was titrated with 0.2 N NaOH solution. The titration was discontinued after adding 30 ml of NaOH solution. The titration was completed by adding 0.25 N KOH solution. The volume of KOH required for completing the titration is: (a) 70 mL (b) 32 mL (c) 35 mL (d) 16 mL
In the neutralization of acid and base N x V of both must be equivalent N x V of HCl... View Article
Which of the following secretions does not contain enzymes? (a) Bile (b) Pancreatic juice (c) Intestinal juice (d) Saliva
Bile Bile does not contain any enzymes like other secretions from the gastrointestinal tract but is very essential in the... View Article
Three rigid rods are joined to form an equilateral triangle ABC of side 1 m. Three particles carrying charges 20μC each are attached to the vertices of the triangle. The whole system is at rest in an inertial frame. The resultant force on the charged particle at A has the magnitude. (a) zero (b) 3.6 N (c) 3.6 √3 N (d) 7.2 N
zero We know that, Fnet = ma a = acceleration of the charged particle at A is zero Hence, we... View Article
To increase the range of a voltmeter we need to connect a suitable (A) high resistance in series (B) high resistance in parallel (C) low resistance in series (D) low resistance in parallel
High resistance in series The range of the voltmeter can be increased by increasing the resistance. This can be done... View Article
The direction of acceleration due to gravity is always vertically downward. State whether true or false (A) True (B) False
True Acceleration due to gravity (g = 9.8 m/s2)always acts in the downward direction. Therefore, the given statement is true... View Article
The additive inverse of 17 is (A) -17 (B) 17 (C) 1/17 (D) -1/17
-17 Since 17 + (-17) = 0 where 0 is the additive identity Therefore, the additive inverse of 17 is... View Article
Inflating a balloon seems to violate Boyle’s law. Why?
Boyle’s law states that the volume of a given mass of a dry gas is inversely proportional to its pressure... View Article
State three differences between water and air
Water 1. The components of water are hydrogen and oxygen which are chemically combined in a fixed ratio of 1:8... View Article
How do you find the exact value of cos (-2π/3)?
We know that, cos (-θ) = cos θ Hence, cos (-2π/3) = cos (2π/3) = cos [π – (π/3)] =... View Article
Turpentine oil in paints is used as a (a) Thinner (b) Vehicle (c) Base (d) Drier
Thinner Turpentine is a substance characteristic of pine trees and other conifers, is composed of a mixture of resins and... View Article
Find out the wrong term 3, 2, 8, 9, 13, 22, 18, 32, 23, 42 (a) 8 (b) 9 (c) 13 (d) 22
The given sequence is a combination of two series as shown below First: 1, 3, 8, 13, 18, 23 Second:... View Article
