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Browse complete papersWhich condition is required for a displacement reaction between a metal and salt solution?
Metal must be same as salt constituent
Metal must be higher in reactivity series
Reaction must be endothermic
Salt must be insoluble in water
Correct answer
Metal must be same as salt constituent
According to the Article 75 of the Indian Constitution, the total number of ministers (including the Prime Minister) in the Council of Ministers shall NOT exceed what percentage of the total members of the House of the People, i.e., Lok Sabha?
25%
20%
15%
10%
Correct answer
25%
A construction worker needs to lift a heavy metal beam using a lever but has a limited length of plank. Which adjustment would allow the worker to lift the beam with the least effort if the position of the fulcrum can be changed but the plank length remains constant?
Keep the fulcrum fixed at any point
Move the fulcrum closer to the beam
Place the fulcrum at the center of the plank
Move the fulcrum closer to the worker
Correct answer
Keep the fulcrum fixed at any point
What file extension is used to save an MS PowerPoint 2021 presentation?
.docx
.xlsx
.pptx
Correct answer
.docx
According to Thomson’s model, how are electrons arranged in an atom?
Randomly placed inside the nucleus
Orbiting around neutrons in elliptical paths
Embedded in a positively charged sphere like seeds in a watermelon
Moving in fixed orbits around the nucleus
Correct answer
Randomly placed inside the nucleus
A student pushes a heavy box that is already moving across a rough floor. If the force applied by the student is exactly equal to the frictional force opposing the motion, what will happen to the box?
The box will move at a constant speed
The box will move at increasing speed
The box will gradually come to rest
The box will accelerate forward
Correct answer
The box will move at a constant speed
What is the main reason sulfur dioxide irritates the upper respiratory mucous membrane?
It dissolves in moisture in upper respiratory tract and forms irritant
It combines with other pollutants and polymerizes in the lungs
It combines with haemoglobin and effect the oxygen transport
It oxidizes to sulphur trioxide and inhaled deep into lung
Correct answer
It dissolves in moisture in upper respiratory tract and forms irritant
Which type of computer virus attaches itself to executable files and gets activated when the file is run?
Worm
Macro Virus
Boot Sector Virus
File Infector Virus
Correct answer
Worm
Which of the following statements is true about the Outbox?
It is used to receive incoming emails.
It contains emails that are currently being drafted.
It temporarily stores emails that are queued for sending.
It holds emails that have been successfully sent.
Correct answer
It is used to receive incoming emails.
Which experimental discovery contradicted Thomson's model of the atom and led to its rejection?
Discovery of the neutron by James Chadwick
Alpha particle scattering showing deflection at large angles
Measurement of atomic radius using X-ray diffraction
Observation of line spectra of hydrogen by Bohr
Correct answer
Discovery of the neutron by James Chadwick