List of top Science & Technology Questions

What is done to prevent rusting of iron door of your house?
Name and state the principle used to measure the specific heat capacity of a substance.
While going from left to right within a period, the size of the atom decreases.
In some countries, ethanol is used as an additive to increase the efficiency of petrol.
For electric power transmission, copper or aluminium wire is used.
Match the columns: Column ‘A’ Column ‘B’ Simple microscope used to observe minute objects
used to see distant objects
used for watch repair
Name the behaviour of water between its temperature from 0°C to 4°C.
What is the reason for twinkling of stars?
Find the odd one out:
Loudspeaker, microphone, electric motor, magnet.
State whether true or false:
A redox reaction takes place during cellular respiration.
CaO + H$_2$O $\rightarrow$ Ca(OH)$_2$ + Heat is an example of ................. reaction.
Light changes its direction when going from one transparent medium to another transparent medium. This process is called ...................... .
.................... is used to make a solenoid type coil in an electric bulb.
The reaction in which ions in the reactants are exchanged to form a precipitate is called as ...................... reaction.
Choose the correct alternative:
Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in .................... .
Shukrapeshi Konyatya Peshivibhajan Paddhatidvare Tayar Hotat ?शुक्रपेशी कोणत्या पेशीविभाजन पद्धतीद्वारे तयार होतात ?
Purush Prajanan Sansthetil Jodi Nasanyarya Konyatyahi Don Avayavanchi Nave Liha. पुरुष प्रजनन संस्थेतील जोडी नसणाऱ्या कोणत्याही दोन अवयवांची नावे लिहा.
Shukravahiniche Kary Liha.शुक्रवाहिनीचे कार्य लिहा.

Takta Purn Kara : (Table image)तक्ता पूर्ण करा :

Purushamadhye Konyatya Avayavat Shukranunchi Nirmiti Hote ? पुरुषांमध्ये कोणत्या अवयवात शुक्राणूंची निर्मिती होते ?
Manavi Shariratil Konyatyahi Don Avasheshanganchi Nave : मानवी शरीरातील कोणत्याही दोन अवशेषांगांची नावे :
Eka Shukranuchi Lambi Kiti Asate ? एका शुक्राणूची लांबी किती असते ?
Avasheshange Mhanje Kay ? अवशेषांगे म्हणजे काय ?
Maje Sharir Donhi Tokanna Nimumlate Ahe. Mi Kallyandvare Shwasan Kart. Maja Varg Olakhun Ek Udaharan Liha. माझे शरीर दोन्ही टोकांना निमुळते आहे. मी कल्ल्यांद्वारे श्वसन करतो. माझा वर्ग ओळखून एक उदाहरण लिहा.
Mi Tumchya Lahan Atadyat Rahato. Majhya Dhagyasarakhe Sharirramadhye Abhasi Dehguh Ahe. Maja Samavesh Konyatya Sanghat Hoto Te Sangun Ek Udaharan Liha. मी तुमच्या लहान आतड्यात राहतो. माझ्या धाग्यासारख्या शरीरामध्ये आभासी देहगुहा आहे. माझा समावेश कोणत्या संघात होतो ते सांगून एक उदाहरण लिहा.