Download App

Heat — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceHeat1 Mark
MCQ
Who Invented Thermos Flask?
  • ✓
    Sir James Dewar.
  • B
    Sir Isaac Newton.
  • C
    Sir Thomas Alva Edison.
  • D
    Sir Antoine Lavoisier.
✓

Answer

Correct option: A.
Sir James Dewar.

Thermo flask is a special kind of flask for keeping liquids. It prevents loss or gain of heat by any of the three methods. It keeps liquid warm or cold for a long time. It was invented by Sir James Dewar in $1893.$ He was a Scottish chemist and physicist.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "MCQ (1 Marks)" from Heat→Heat — all question types→Science STD 7 question papers→Gujarat Board STD 7 question papers→Gujarat Board question paper generator→

Similar questions

The time interval between one sunrise and next sunrise is called a:
→
What percentage of the earth’s surface is covered with water?
→
An average person has a pulse rate:
→
Which Of The Following Statements Is Or Are Incorrect?
→
If the number of turns in the coil of an electromagnet is more, the strength of the electromagnet will be
→
The Department which prepares weather report is:
→
How long does Earth take to complete one revolution?
→
Which of the following oxides would turn red litmus paper blue, indicating a basic nature?
→
Boojho Wants To Know That When A Cold Steel Spoon Is Dipped In A Cup Of Hot Milk. It Transfer Heat To Its Other End By The Process Of:
→
While playing cricket, Anant got an injury on his knee. The blood oozed out from the injured site, but after some time a dark red coloured clot formed there. Which component of the blood is responsible for the formation of clot?
→