1. Which is the most reactive metal?i. copperii. Goldiii. Silveriv. IronAns: iv. Iron 2. Which of the following statement is correct ?i. Bauxite is an ore of aluminiumii. Haematite is an ore of silver.iii. Pyrite is an ore of iron.iv. Alluvial soil is an ore of copper.Ans: i. Bauxite is an ore of aluminium 3….
1. Which gas is used in making the blue print of maps?i. co2ii. NH3iii. H₂iv. N2Ans: iv. N2 2. What are the necessary required conditions to manufacture ammonia by Haber’s process?i. heat, pressure and catalystii. heat, pressure and promoteriii. pressure, catalyst and promoteriv. heat, pressure, catalyst and promoterAns: i. heat, pressure and catalyst 3. Which…
1). In which chemical reaction, does the exchange of ions or groups between two substances takes place?i. Combinationii. Double displacementiii. Additioniv. NeutralizationAns: ii. Double displacement 2). What happens when dilute hydrochloric acid is added to an iron nail?i. No reaction takes place.ii. Hydrogen gas and iron chloride are produced.iii. Chlorine gas and iron hydroxide are…
1). Which of the following is correct about the modern periodic law?i. It is based on atomic size.ii. It is based on atomic number.iii. It is based on valence electron.iv. It is based on atomic mass.Ans: ii. It is based on atomic number. 2). Which of the following do alkali metals belong to?i. S-block elementsii….
1). Which type of information is referred to as digital data?i. Continuousii. Discreteiii. Bitiv. BytesAns:iii. Bit 2). What is a digital footprint?i. A collection of data from someone’s online activity that can be traced back to themii. A list of websites where a person has gone onlineiii. Tracking someone’s physical location through an appiv. All…
1.What is the condition of the matter of the universe for an open universe in the future?i. Equal density to critical densityii. More density than critical densityiii. Less density than critical densityiv. Less or more density than critical densityAns: iii. Less density than critical density 2.What percent of the universe is visible to us?i. 15ii….
1).Who discovered the magnetic effect of electric current?i. Flemingii. Daltoniii. Oerstediv. FaradayAns: iii. Oersted 2).Which instrument changes lower a. c. voltage into higher a. c. voltage and vice- versa?i. Transformerii. Dynamoiii. Inverteriv. AdaptorAns: i. Transformer 3). Which instrument provides electricity in a large scale but causes pollution?i. Hydroelectric power plantii. Thermal power plantiii. Wind power…
1).What is the speed of light in vacuum.i. 3×10 km/sii. 2.25 x10 m/siii. 3×10 m/siv. 3×10 cm/sAns: iii. 3×10 m/s 2). Which colour of light has the highest speed in a medium?i. blueii. Violetiii. Orangeiv.RedAns: iv.Red 3). Absorption of which ray causes hotness?i. UV raysii. Infrared rayiii. X-rayiv. Gamma rayAns: ii. Infrared ray 4). Which…
1). What is the average kinetic energy of the molecules contained in a body?i. heatii. temperatureiii. thermal energyiv. internal energyAns: ii. temperature 2).Which of the following is equivalent to 1 calorie heat?i. 1.2 J ii. 2.2J iii. 3.2 j iv 4.2JAns: iv. 4.2 J 3).Which of the following is the SI unit of temperature?i.kelvinii. degree…
1). Which law is given by the statement, “Any pressure applied on an enclosed liquid is transmitted equally to all parts.”i. Pascal’s law ii. Archimedes’ principle iii. Principle of floatation iv. Boyle’s lawAns: Pascal’s law 2). Which formula shows the ratio of the cross sectional area of two pistons and the forces applied on them…
