Question

21Mercury level in a clinical thermometer does not fall when taken out of the mouth because of the ___________________.
(1 Point)
Room temperature
bulb
kink
glass body
22The range of laboratory thermometer is generally between ____________.
(1 Point)
0℃ to 100℃
35℃ to 42℃
10℃ to 110℃
-10℃ to 110℃
23Air conditioners in our house work on the principle of _____________.
(1 Point)
conduction
radiation
convection
insulation
24Identify the given thermometer:
(1 Point)
Digital thermometer
Laboratory thermometer
Maximum minimum thermometer
Normal thermometer
25When a clinical thermometer is kept in the Sun or near a flame, it will ______________.
(1 Point)
measure the temperature
break
melt
remain unchanged
26A plastic spoon is dipped in a cup of hot water. After some time, its other end ___________________.
(1 Point)
remains unaffected
becomes hot due to conduction
becomes hot due to convection
becomes hot due to radiation
27The correct temperature shown in the given temperature is ___________.
(1 Point)
100°F
80°F
70°F
35°F
28Statement 1- Land breeze blows during day.
Statement 2- Light coloured clothes are preferred during summer.
(1 Point)
both statement 1 and statement 2 are correct
both statement 1 and statement 2 are incorrect
statement 1 is correct but statement 2 is incorrect
statement 1 is incorrect but statement 2 is correct
29No medium is required for transfer of heat by the process of __________.
(1 Point)
radiation
insulation
conduction
convection
30Rohan wanted to test the nature of the solution given in the beaker. He used blue litmus paper to find out the nature of the solution and observed the change as shown in the picture. He concluded that ________________________________.
(1 Point)
the solution in the beaker is either basic or neutral
the solution in the beaker is neutral
the solution in the beaker is acidic
the solution in the beaker is basic​

Answer 1

Answer:

21 Room temperature

22. -10 degree Celsius to 110 degree Celsius