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Which of the following tissues does not possess a vacuole?a)Cambium b)Apical meristem c)Both Cambium and Apical d)Neither Cambium or Apical

Both Cambium and Apical meristem... View Article

An object of mass, m is moving with a constant velocity, v. how much work should be done on the object in order to bring the object to rest?

Answer: The kinetic energy of an object of mass m, moving with a velocity, v is given by the expression, K.E = 1/2 mv2 In order to bring it to... View Article

The velocity of a body of mass 15 kg increases from 5 m/s to 10 m/s when a force acts on it for 2 s. What is the gain in momentum per second?

Mass of the body, m = 15 kg Initial velocity, u = 5 m/s Final velocity, v = 10 m/s Time, t = 2s Initial Momentum, p1 = mu = 15 × 5 = 75 kg... View Article

Does the transfer of energy take place when you push a huge rock with all your might and fail to move it? Where is the energy you spend going?

When we push a huge rock, there is no transfer of muscular energy to the stationary rock. Also, there is no loss of energy because muscular... View Article

Which one acts as both oxidising as well as reducing agent? a.CH₂O₂ b.HNO₂ c.KNO₃ d.O₂

Answer : (b) HNO2 Nitrous acid is unstable and weakly acidic compound. It exists in the solution of nitrate salts only. Nitrous acid is a... View Article

Which of the following reasons does not lead to water scarcity? a. Deforestation b. Green House Gases c. Droughts d. Construction of Large Dams

Answer Option (d) Construction of Large Dams Water is one of the basic necessities for every living being and we cannot imagine a life without... View Article

An electric heater of resistance 8Ω draws 15 A from the service mains for 2 hours. Calculate the rate at which heat is developed in the heater.

Answer: Given parameters The resistance of the electric heater (R) = 8 Ω Current drawn (I) = 15 A Time = 2 hrs T = 120 min x 60 Time (T) =... View Article

Which of the following heart tissues is known as the pacemaker? (1) Sinoatrial node (2) Atrioventricular node (3) Purkinje fibres (4) His bundle

Answer: (1) Sinoatrial node The sinoatrial node or SA node is called the natural pacemaker of the heart. The impulse initiates in a small... View Article

Which of the following can be used to see atoms? a.Scanning tunneling microscope b.Compound Microscope c.Stereo Microscope d.Confocal Microscope

Answer Option (a) Scanning tunneling microscope A scanning tunnelling microscope is the most advanced type of electron microscope which enables... View Article

Choose the correct option for which is not the structure of C4H9Br: i) 1-Bromobutane ii) 2-Bromobutane iii) 1-Bromo-2-methylpropane iv) Isobutane

The correct option for which is not the structure of C4H9Br: iv) Isobutane Bromobutane appears as a clear colourless liquid. Flash point 65°F.... View Article

Choose the miroorganisms that are involved in yoghurt production: i) Streptococcus thermophilus ii) Lactobacillus bulgaricus iii) E.coli iv) Vibrio

The correct options are i) Streptococcus thermophilus ii) Lactobacillus bulgaricus. These are the microorganisms that are involved in yoghurt... View Article

Why do you think there should be equitable distribution of resources? What forces would be working against an equitable distribution of our resources?

Equitable distribution of resources empowers every human to receive their share of the resources and makes sure that everyone has the essential... View Article

Which of the following is not a part of rapid movement? i) Sudden propulsion of spores. ii) Creep iii) Explosive spore dispersal iv) None of the above

Creep... View Article

Which of the following can be used as manure for plants? i) Kitchen waste ii) Waste from the industries iii) Wastes from hospitals iv) Wastes from schools

Answer Option (a) Kitchen waste Waste is defined as unwanted and unusable materials and is regarded as a substance that is of no use. Waste... View Article

Which one of the following is the use of concave lens? a. Used in Optical Instruments b. Used as a camera lens c. Used in a projector d. Used in telescopes

Concave lens is used in optical instruments. In other mentioned options, concave lens is not used.... View Article

A merchant had Rs78,592 with her. She placed an order for purchasing 40 radio sets at Rs1,200 each. How much money will remain with her after the purchase?

Given that A merchant had Rs78,592 Cost of one radio Set = Rs. 1200 She placed orders for 40 radio sets. Find out Money left with her after... View Article

Two circular coils A and B are placed closed to each other. If the current in the coil A is changed, will some current be induced in the coil B? Give reason.

Answer: Two circular coils, A and B, are placed close to each other. When the current in coil A is changed, the magnetic field associated with... View Article

In which of the following reaction can equilibrium be attained? (a) Reversible reaction (b) Irreversible reaction (c) Redox Reaction (d) Single Displacement Reaction

Equilibrium can be attained in (a) reversible reaction. A reversible reaction is defined as a chemical reaction where the reactants and the... View Article

An athlete completes one round of a circular track of diameter 200 m in 40 s. what will be the distance covered and the displacement at the end of 2 minutes 20s?

Given that diameter = 200m time = 40 s radius = 200/2 = 100 m Find out The distance covered and the displacement at the end of 2 minutes 20s... View Article

The length, breadth and height of a room are 825 cm, 675 cm and 450 cm respectively. The longest tape which can measure the three dimensions of the room exactly.

Answer: To find the length of the longest tape which can measure the three dimensions of the room, we need to find the H.C.F of length, breadth... View Article

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