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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

Which of the following represents the correct composition of sweat?a)Water, Salts, Urea b)Water, Salt, Calcium c)Salt, Calcium, Phosphorous d)Water, Urea, Calcium

Answer Option (a)Water, Salts, Urea The skin of mammals comprises around four million sweat glands. They secrete fluids called sweat. They are... View Article

How will you separate a mixture containing kerosene and petrol (difference in their boiling points is more than 25ºC), which are miscible with each other? Solution

Answer: A mixture of two miscible liquids having a difference in their boiling points of more than 25 °C can be separated by simple... View Article

A hammer of mass 500 g, moving at 50 m/s, strikes a nail. The nail stops the hammer in a very short time of 0.01 s. What is the force of the nail on the hammer?

Answer: Mass of the hammer (m) = 500 g = 0.5 kg The initial velocity of the hammer (u) = 50 m/s The nail takes time to stop the hammer (t) =... View Article

The distance between the school and the house of a student’s house is 1 km 875 m. Every day she walks both ways. Find the total distance covered by her in six days.

Given that Distance between school and home = 1875m Find out We have to find out the total distance covered by her in six days Solution To... View Article

Majority of the reactions of alkynes are the examples of _____. a. Addition reaction b. Redox Reaction c. Single Replacement Reaction d. Double Replacement Reaction

The majority of the reactions of alkynes are examples of (a) Addition reaction The chemistry connected with carbon-carbon triple bonds can be... View Article

An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be Option A: 100 W Option B: 75 W Option C: 50 W Option D: 25 W

Answer Correct option: D 25 W Given that An electric bulb is rated 220 V and 100 W Find out The power consumed when it is operated on 110 V... View Article

The valence shell of the element X contains 2 electrons in a 5s sub shell. Below that shell, element X has a partially filled 4d sub shell. What type of element is X?

Element X is a 5th-period transition element. Given that the element X contains 2 electrons in a 5s subshell. This implies 5s orbital is... View Article

Which of the following is a major aspect of personal hygiene? i) Physical exercise ii) Washing hands after having food iii) Cleaning rooms everyday iv) None of the above

Answer option (i) Physical exercise Hygiene can be described as the practice of a few habits in order to maintain good health, overall.... View Article

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